mirror of
https://github.com/phpbb/phpbb.git
synced 2025-06-07 06:55:25 +02:00
dfe674ffa1
- changed the way we decide if a DB gets multi value support. Old method uses switch/case, new method assumes a DB can't unless the DB says it can via a property I hope nothing is broken :P git-svn-id: file:///svn/phpbb/trunk@7466 89ea8834-ac86-4346-8a33-228a782c2dd0
744 lines
18 KiB
PHP
744 lines
18 KiB
PHP
<?php
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/**
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*
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* @package dbal
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* @version $Id$
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* @copyright (c) 2005 phpBB Group
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* @license http://opensource.org/licenses/gpl-license.php GNU Public License
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*
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*/
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/**
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* Database Abstraction Layer
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* @package dbal
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*/
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class dbal
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{
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var $db_connect_id;
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var $query_result;
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var $return_on_error = false;
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var $transaction = false;
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var $sql_time = 0;
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var $num_queries = array();
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var $open_queries = array();
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var $curtime = 0;
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var $query_hold = '';
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var $html_hold = '';
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var $sql_report = '';
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var $persistency = false;
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var $user = '';
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var $server = '';
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var $dbname = '';
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// Set to true if error triggered
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var $sql_error_triggered = false;
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// Holding the last sql query on sql error
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var $sql_error_sql = '';
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// Supports multi inserts?
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var $multi_insert = false;
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/**
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* Current sql layer
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*/
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var $sql_layer = '';
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/**
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* Constructor
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*/
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function dbal()
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{
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$this->num_queries = array(
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'cached' => 0,
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'normal' => 0,
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'total' => 0,
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);
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// Fill default sql layer based on the class being called.
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// This can be changed by the specified layer itself later if needed.
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$this->sql_layer = substr(get_class($this), 5);
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}
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/**
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* return on error or display error message
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*/
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function sql_return_on_error($fail = false)
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{
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$this->sql_error_triggered = false;
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$this->sql_error_sql = '';
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$this->return_on_error = $fail;
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}
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/**
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* Return number of sql queries and cached sql queries used
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*/
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function sql_num_queries($cached = false)
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{
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return ($cached) ? $this->num_queries['cached'] : $this->num_queries['normal'];
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}
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/**
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* Add to query count
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*/
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function sql_add_num_queries($cached = false)
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{
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$this->num_queries['cached'] += ($cached) ? 1 : 0;
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$this->num_queries['normal'] += ($cached) ? 0 : 1;
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$this->num_queries['total'] += 1;
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}
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/**
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* DBAL garbage collection, close sql connection
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*/
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function sql_close()
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{
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if (!$this->db_connect_id)
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{
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return false;
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}
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if ($this->transaction)
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{
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$this->sql_transaction('commit');
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}
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foreach ($this->open_queries as $query_id)
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{
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$this->sql_freeresult($query_id);
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}
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return $this->_sql_close();
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}
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/**
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* Build LIMIT query
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* Doing some validation here.
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*/
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function sql_query_limit($query, $total, $offset = 0, $cache_ttl = 0)
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{
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if (empty($query))
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{
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return false;
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}
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// Never use a negative total or offset
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$total = ($total < 0) ? 0 : $total;
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$offset = ($offset < 0) ? 0 : $offset;
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return $this->_sql_query_limit($query, $total, $offset, $cache_ttl);
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}
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/**
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* Fetch all rows
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*/
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function sql_fetchrowset($query_id = false)
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{
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if ($query_id === false)
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{
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$query_id = $this->query_result;
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}
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if ($query_id !== false)
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{
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$result = array();
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while ($row = $this->sql_fetchrow($query_id))
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{
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$result[] = $row;
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}
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return $result;
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}
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return false;
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}
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/**
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* Fetch field
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* if rownum is false, the current row is used, else it is pointing to the row (zero-based)
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*/
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function sql_fetchfield($field, $rownum = false, $query_id = false)
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{
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global $cache;
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if ($query_id === false)
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{
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$query_id = $this->query_result;
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}
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if ($query_id !== false)
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{
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if ($rownum !== false)
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{
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$this->sql_rowseek($rownum, $query_id);
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}
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if (!is_object($query_id) && isset($cache->sql_rowset[$query_id]))
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{
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return $cache->sql_fetchfield($query_id, $field);
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}
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$row = $this->sql_fetchrow($query_id);
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return (isset($row[$field])) ? $row[$field] : false;
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}
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return false;
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}
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/**
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* SQL Transaction
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* @access private
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*/
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function sql_transaction($status = 'begin')
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{
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switch ($status)
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{
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case 'begin':
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// Commit previously opened transaction before opening another transaction
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if ($this->transaction)
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{
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$this->_sql_transaction('commit');
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}
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$result = $this->_sql_transaction('begin');
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$this->transaction = true;
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break;
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case 'commit':
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$result = $this->_sql_transaction('commit');
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$this->transaction = false;
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if (!$result)
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{
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$this->_sql_transaction('rollback');
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}
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break;
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case 'rollback':
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$result = $this->_sql_transaction('rollback');
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$this->transaction = false;
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break;
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default:
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$result = $this->_sql_transaction($status);
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break;
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}
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return $result;
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}
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/**
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* Build sql statement from array for insert/update/select statements
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*
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* Idea for this from Ikonboard
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* Possible query values: INSERT, INSERT_SELECT, MULTI_INSERT, UPDATE, SELECT
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*
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*/
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function sql_build_array($query, $assoc_ary = false)
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{
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if (!is_array($assoc_ary))
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{
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return false;
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}
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$fields = $values = array();
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if ($query == 'INSERT' || $query == 'INSERT_SELECT')
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{
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foreach ($assoc_ary as $key => $var)
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{
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$fields[] = $key;
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if (is_array($var) && is_string($var[0]))
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{
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// This is used for INSERT_SELECT(s)
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$values[] = $var[0];
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}
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else
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{
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$values[] = $this->_sql_validate_value($var);
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}
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}
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$query = ($query == 'INSERT') ? ' (' . implode(', ', $fields) . ') VALUES (' . implode(', ', $values) . ')' : ' (' . implode(', ', $fields) . ') SELECT ' . implode(', ', $values) . ' ';
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}
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else if ($query == 'MULTI_INSERT')
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{
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$ary = array();
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foreach ($assoc_ary as $id => $sql_ary)
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{
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// If by accident the sql array is only one-dimensional we build a normal insert statement
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if (!is_array($sql_ary))
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{
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return $this->sql_build_array('INSERT', $assoc_ary);
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}
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$values = array();
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foreach ($sql_ary as $key => $var)
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{
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$values[] = $this->_sql_validate_value($var);
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}
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$ary[] = '(' . implode(', ', $values) . ')';
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}
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$query = ' (' . implode(', ', array_keys($assoc_ary[0])) . ') VALUES ' . implode(', ', $ary);
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}
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else if ($query == 'UPDATE' || $query == 'SELECT')
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{
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$values = array();
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foreach ($assoc_ary as $key => $var)
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{
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$values[] = "$key = " . $this->_sql_validate_value($var);
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}
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$query = implode(($query == 'UPDATE') ? ', ' : ' AND ', $values);
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}
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return $query;
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}
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/**
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* Build IN or NOT IN sql comparison string, uses <> or = on single element
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* arrays to improve comparison speed
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*
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* @access public
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* @param string $field name of the sql column that shall be compared
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* @param array $array array of values that are allowed (IN) or not allowed (NOT IN)
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* @param bool $negate true for NOT IN (), false for IN () (default)
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* @param bool $allow_empty_set If true, allow $array to be empty, this function will return 1=1 or 1=0 then. Default to false.
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*/
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function sql_in_set($field, $array, $negate = false, $allow_empty_set = false)
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{
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if (!sizeof($array))
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{
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if (!$allow_empty_set)
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{
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// Print the backtrace to help identifying the location of the problematic code
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$this->sql_error('No values specified for SQL IN comparison');
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}
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else
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{
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// NOT IN () actually means everything so use a tautology
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if ($negate)
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{
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return '1=1';
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}
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// IN () actually means nothing so use a contradiction
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else
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{
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return '1=0';
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}
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}
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}
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if (!is_array($array))
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{
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$array = array($array);
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}
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if (sizeof($array) == 1)
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{
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@reset($array);
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$var = current($array);
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return $field . ($negate ? ' <> ' : ' = ') . $this->_sql_validate_value($var);
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}
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else
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{
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return $field . ($negate ? ' NOT IN ' : ' IN ') . '(' . implode(', ', array_map(array($this, '_sql_validate_value'), $array)) . ')';
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}
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}
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/**
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* Run more than one insert statement.
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*
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* @param string $table table name to run the statements on
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* @param array &$sql_ary multi-dimensional array holding the statement data.
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*
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* @return bool false if no statements were executed.
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* @access public
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*/
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function sql_multi_insert($table, &$sql_ary)
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{
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if (!sizeof($sql_ary))
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{
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return false;
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}
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if ($this->multi_insert)
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{
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$this->sql_query('INSERT INTO ' . $table . ' ' . $this->sql_build_array('MULTI_INSERT', $sql_ary));
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}
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else
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{
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foreach ($sql_ary as $ary)
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{
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if (!is_array($ary))
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{
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return false;
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}
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$this->sql_query('INSERT INTO ' . $table . ' ' . $this->sql_build_array('INSERT', $ary));
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}
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}
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return true;
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}
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/**
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* Function for validating values
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* @access private
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*/
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function _sql_validate_value($var)
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{
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if (is_null($var))
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{
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return 'NULL';
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}
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else if (is_string($var))
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{
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return "'" . $this->sql_escape($var) . "'";
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}
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else
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{
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return (is_bool($var)) ? intval($var) : $var;
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}
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}
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/**
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* Build sql statement from array for select and select distinct statements
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*
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* Possible query values: SELECT, SELECT_DISTINCT
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*/
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function sql_build_query($query, $array)
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{
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$sql = '';
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switch ($query)
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{
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case 'SELECT':
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case 'SELECT_DISTINCT';
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$sql = str_replace('_', ' ', $query) . ' ' . $array['SELECT'] . ' FROM ';
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$table_array = array();
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foreach ($array['FROM'] as $table_name => $alias)
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{
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if (is_array($alias))
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{
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foreach ($alias as $multi_alias)
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{
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$table_array[] = $table_name . ' ' . $multi_alias;
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}
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}
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else
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{
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$table_array[] = $table_name . ' ' . $alias;
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}
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}
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$sql .= $this->_sql_custom_build('FROM', implode(', ', $table_array));
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if (!empty($array['LEFT_JOIN']))
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{
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foreach ($array['LEFT_JOIN'] as $join)
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{
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$sql .= ' LEFT JOIN ' . key($join['FROM']) . ' ' . current($join['FROM']) . ' ON (' . $join['ON'] . ')';
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}
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}
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if (!empty($array['WHERE']))
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{
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$sql .= ' WHERE ' . $this->_sql_custom_build('WHERE', $array['WHERE']);
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}
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if (!empty($array['GROUP_BY']))
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{
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$sql .= ' GROUP BY ' . $array['GROUP_BY'];
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}
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if (!empty($array['ORDER_BY']))
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{
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$sql .= ' ORDER BY ' . $array['ORDER_BY'];
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}
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break;
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}
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return $sql;
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}
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/**
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* display sql error page
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*/
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function sql_error($sql = '')
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{
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global $auth, $user, $config;
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// Set var to retrieve errored status
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$this->sql_error_triggered = true;
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$this->sql_error_sql = $sql;
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$error = $this->_sql_error();
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if (!$this->return_on_error)
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{
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$message = '<u>SQL ERROR</u> [ ' . $this->sql_layer . ' ]<br /><br />' . $error['message'] . ' [' . $error['code'] . ']';
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// Show complete SQL error and path to administrators only
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// Additionally show complete error on installation or if extended debug mode is enabled
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// The DEBUG_EXTRA constant is for development only!
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if (isset($auth) && ($auth->acl_get('a_') || defined('IN_INSTALL') || defined('DEBUG_EXTRA')))
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{
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// Print out a nice backtrace...
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$backtrace = get_backtrace();
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$message .= ($sql) ? '<br /><br /><u>SQL</u><br /><br />' . htmlspecialchars($sql) : '';
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$message .= ($backtrace) ? '<br /><br /><u>BACKTRACE</u><br />' . $backtrace : '';
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$message .= '<br />';
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}
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else
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{
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// If error occurs in initiating the session we need to use a pre-defined language string
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// This could happen if the connection could not be established for example (then we are not able to grab the default language)
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if (!isset($user->lang['SQL_ERROR_OCCURRED']))
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{
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$message .= '<br /><br />An sql error occurred while fetching this page. Please contact an administrator if this problem persists.';
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}
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else
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{
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if (!empty($config['board_contact']))
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{
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$message .= '<br /><br />' . sprintf($user->lang['SQL_ERROR_OCCURRED'], '<a href="mailto:' . htmlspecialchars($config['board_contact']) . '">', '</a>');
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}
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else
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{
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$message .= '<br /><br />' . sprintf($user->lang['SQL_ERROR_OCCURRED'], '', '');
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}
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}
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}
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if ($this->transaction)
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{
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$this->sql_transaction('rollback');
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}
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if (strlen($message) > 1024)
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{
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// We need to define $msg_long_text here to circumvent text stripping.
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global $msg_long_text;
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$msg_long_text = $message;
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trigger_error(false, E_USER_ERROR);
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}
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trigger_error($message, E_USER_ERROR);
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}
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return $error;
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}
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/**
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* Explain queries
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*/
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function sql_report($mode, $query = '')
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{
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global $cache, $starttime, $phpbb_root_path, $user;
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if (empty($_REQUEST['explain']))
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{
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return false;
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}
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if (!$query && $this->query_hold != '')
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{
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$query = $this->query_hold;
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}
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switch ($mode)
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{
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case 'display':
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if (!empty($cache))
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{
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$cache->unload();
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}
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$this->sql_close();
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$mtime = explode(' ', microtime());
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$totaltime = $mtime[0] + $mtime[1] - $starttime;
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echo '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" dir="ltr">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
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<meta http-equiv="Content-Style-Type" content="text/css" />
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<meta http-equiv="imagetoolbar" content="no" />
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<title>SQL Report</title>
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<link href="' . $phpbb_root_path . 'adm/style/admin.css" rel="stylesheet" type="text/css" media="screen" />
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</head>
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<body id="errorpage">
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|
<div id="wrap">
|
|
<div id="page-header">
|
|
<a href="' . build_url('explain') . '">Return to previous page</a>
|
|
</div>
|
|
<div id="page-body">
|
|
<div id="acp">
|
|
<div class="panel">
|
|
<span class="corners-top"><span></span></span>
|
|
<div id="content">
|
|
<h1>SQL Report</h1>
|
|
<br />
|
|
<p><b>Page generated in ' . round($totaltime, 4) . " seconds with {$this->num_queries['normal']} queries" . (($this->num_queries['cached']) ? " + {$this->num_queries['cached']} " . (($this->num_queries['cached'] == 1) ? 'query' : 'queries') . ' returning data from cache' : '') . '</b></p>
|
|
|
|
<p>Time spent on ' . $this->sql_layer . ' queries: <b>' . round($this->sql_time, 5) . 's</b> | Time spent on PHP: <b>' . round($totaltime - $this->sql_time, 5) . 's</b></p>
|
|
|
|
<br /><br />
|
|
' . $this->sql_report . '
|
|
</div>
|
|
<span class="corners-bottom"><span></span></span>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div id="page-footer">
|
|
Powered by phpBB © ' . date('Y') . ' <a href="http://www.phpbb.com/">phpBB Group</a>
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html>';
|
|
exit;
|
|
break;
|
|
|
|
case 'stop':
|
|
$endtime = explode(' ', microtime());
|
|
$endtime = $endtime[0] + $endtime[1];
|
|
|
|
$this->sql_report .= '
|
|
|
|
<table cellspacing="1">
|
|
<thead>
|
|
<tr>
|
|
<th>Query #' . $this->num_queries['total'] . '</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr>
|
|
<td class="row3"><textarea style="font-family:\'Courier New\',monospace;width:99%" rows="5" cols="10">' . preg_replace('/\t(AND|OR)(\W)/', "\$1\$2", htmlspecialchars(preg_replace('/[\s]*[\n\r\t]+[\n\r\s\t]*/', "\n", $query))) . '</textarea></td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
|
|
' . $this->html_hold . '
|
|
|
|
<p style="text-align: center;">
|
|
';
|
|
|
|
if ($this->query_result)
|
|
{
|
|
if (preg_match('/^(UPDATE|DELETE|REPLACE)/', $query))
|
|
{
|
|
$this->sql_report .= 'Affected rows: <b>' . $this->sql_affectedrows($this->query_result) . '</b> | ';
|
|
}
|
|
$this->sql_report .= 'Before: ' . sprintf('%.5f', $this->curtime - $starttime) . 's | After: ' . sprintf('%.5f', $endtime - $starttime) . 's | Elapsed: <b>' . sprintf('%.5f', $endtime - $this->curtime) . 's</b>';
|
|
}
|
|
else
|
|
{
|
|
$error = $this->sql_error();
|
|
$this->sql_report .= '<b style="color: red">FAILED</b> - ' . $this->sql_layer . ' Error ' . $error['code'] . ': ' . htmlspecialchars($error['message']);
|
|
}
|
|
|
|
$this->sql_report .= '</p><br /><br />';
|
|
|
|
$this->sql_time += $endtime - $this->curtime;
|
|
break;
|
|
|
|
case 'start':
|
|
$this->query_hold = $query;
|
|
$this->html_hold = '';
|
|
|
|
$this->_sql_report($mode, $query);
|
|
|
|
$this->curtime = explode(' ', microtime());
|
|
$this->curtime = $this->curtime[0] + $this->curtime[1];
|
|
|
|
break;
|
|
|
|
case 'add_select_row':
|
|
|
|
$html_table = func_get_arg(2);
|
|
$row = func_get_arg(3);
|
|
|
|
if (!$html_table && sizeof($row))
|
|
{
|
|
$html_table = true;
|
|
$this->html_hold .= '<table cellspacing="1"><tr>';
|
|
|
|
foreach (array_keys($row) as $val)
|
|
{
|
|
$this->html_hold .= '<th>' . (($val) ? ucwords(str_replace('_', ' ', $val)) : ' ') . '</th>';
|
|
}
|
|
$this->html_hold .= '</tr>';
|
|
}
|
|
$this->html_hold .= '<tr>';
|
|
|
|
$class = 'row1';
|
|
foreach (array_values($row) as $val)
|
|
{
|
|
$class = ($class == 'row1') ? 'row2' : 'row1';
|
|
$this->html_hold .= '<td class="' . $class . '">' . (($val) ? $val : ' ') . '</td>';
|
|
}
|
|
$this->html_hold .= '</tr>';
|
|
|
|
return $html_table;
|
|
|
|
break;
|
|
|
|
case 'fromcache':
|
|
|
|
$this->_sql_report($mode, $query);
|
|
|
|
break;
|
|
|
|
case 'record_fromcache':
|
|
|
|
$endtime = func_get_arg(2);
|
|
$splittime = func_get_arg(3);
|
|
|
|
$time_cache = $endtime - $this->curtime;
|
|
$time_db = $splittime - $endtime;
|
|
$color = ($time_db > $time_cache) ? 'green' : 'red';
|
|
|
|
$this->sql_report .= '<table cellspacing="1"><thead><tr><th>Query results obtained from the cache</th></tr></thead><tbody><tr>';
|
|
$this->sql_report .= '<td class="row3"><textarea style="font-family:\'Courier New\',monospace;width:99%" rows="5" cols="10">' . preg_replace('/\t(AND|OR)(\W)/', "\$1\$2", htmlspecialchars(preg_replace('/[\s]*[\n\r\t]+[\n\r\s\t]*/', "\n", $query))) . '</textarea></td></tr></tbody></table>';
|
|
$this->sql_report .= '<p style="text-align: center;">';
|
|
$this->sql_report .= 'Before: ' . sprintf('%.5f', $this->curtime - $starttime) . 's | After: ' . sprintf('%.5f', $endtime - $starttime) . 's | Elapsed [cache]: <b style="color: ' . $color . '">' . sprintf('%.5f', ($time_cache)) . 's</b> | Elapsed [db]: <b>' . sprintf('%.5f', $time_db) . 's</b></p><br /><br />';
|
|
|
|
// Pad the start time to not interfere with page timing
|
|
$starttime += $time_db;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
$this->_sql_report($mode, $query);
|
|
|
|
break;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
*/
|
|
if (!defined('IN_PHPBB'))
|
|
{
|
|
exit;
|
|
}
|
|
|
|
/**
|
|
* This variable holds the class name to use later
|
|
*/
|
|
$sql_db = 'dbal_' . $dbms;
|
|
|
|
?>
|