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447 lines
9.3 KiB
PHP
447 lines
9.3 KiB
PHP
<?php
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/***************************************************************************
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* mssql.php
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* -------------------
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* begin : Saturday, Feb 13, 2001
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* copyright : (C) 2001 The phpBB Group
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* email : supportphpbb.com
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*
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* $Id$
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*
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***************************************************************************/
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/***************************************************************************
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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***************************************************************************/
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if(!defined("SQL_LAYER"))
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{
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define("SQL_LAYER","mssql");
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class sql_db
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{
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var $db_connect_id;
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var $result;
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var $next_id;
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var $in_transaction = 0;
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var $row = array();
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var $rowset = array();
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var $limit_offset;
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var $query_limit_success;
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var $num_queries = 0;
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function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $persistency = true)
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{
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$this->persistency = $persistency;
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$this->user = $sqluser;
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$this->password = $sqlpassword;
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$this->server = $sqlserver;
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$this->dbname = $database;
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$this->db_connect_id = ($this->persistency) ? @mssql_pconnect($this->server, $this->user, $this->password) : @mssql_connect($this->server, $this->user, $this->password);
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if($this->db_connect_id && $this->dbname != '')
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{
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if(!@mssql_select_db($this->dbname, $this->db_connect_id))
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{
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@mssql_close($this->db_connect_id);
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return false;
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}
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}
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return ($this->db_connect_id) ? $this->db_connect_id : $this->sql_error('');
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}
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function sql_return_on_error($fail = false)
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{
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$this->return_on_error = $fail;
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}
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function sql_num_queries()
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{
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return $this->num_queries;
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}
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//
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// Other base methods
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//
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function sql_close()
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{
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if($this->db_connect_id)
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{
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//
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// Commit any remaining transactions
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//
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if($this->in_transaction)
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{
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@mssql_query("COMMIT", $this->db_connect_id);
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}
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return @mssql_close($this->db_connect_id);
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}
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else
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{
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return false;
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}
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}
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//
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// Query method
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//
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function sql_query($query = "", $transaction = FALSE)
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{
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//
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// Remove any pre-existing queries
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//
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unset($this->result);
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unset($this->row);
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if ($query != "")
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{
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$this->num_queries++;
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if ($transaction == BEGIN_TRANSACTION && !$this->in_transaction)
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{
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if (!mssql_query("BEGIN TRANSACTION", $this->db_connect_id))
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{
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return false;
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}
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$this->in_transaction = TRUE;
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}
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//
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// Does query contain any LIMIT code? If so pull out relevant start and num_results
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// This isn't terribly easy with MSSQL, whatever you do will potentially impact
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// performance compared to an 'in-built' limit
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//
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// Another issue is the 'lack' of a returned true value when a query is valid but has
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// no result set (as with all the other DB interfaces). It seems though that it's
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// 'fair' to say that if a query returns a false result (ie. no resource id) then the
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// SQL was valid but had no result set. If the query returns nothing but the rowcount
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// returns something then there's a problem. This may well be a false assumption though
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// ... needs checking under Windows itself.
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//
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if(preg_match("/^SELECT(.*?)(LIMIT ([0-9]+)[, ]*([0-9]+)*)?$/s", $query, $limits))
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{
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$query = $limits[1];
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if(!empty($limits[2]))
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{
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$row_offset = ($limits[4]) ? $limits[3] : "";
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$num_rows = ($limits[4]) ? $limits[4] : $limits[3];
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$query = "TOP " . ($row_offset + $num_rows) . $query;
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}
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$this->result = mssql_query("SELECT $query", $this->db_connect_id);
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if($this->result)
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{
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$this->limit_offset[$this->result] = (!empty($row_offset)) ? $row_offset : 0;
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if($row_offset > 0)
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{
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mssql_data_seek($this->result, $row_offset);
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}
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}
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}
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else if(eregi("^INSERT ", $query))
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{
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if(mssql_query($query, $this->db_connect_id))
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{
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$this->result = time() + microtime();
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$result_id = mssql_query("SELECT @@IDENTITY AS id, @@ROWCOUNT as affected", $this->db_connect_id);
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if($result_id)
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{
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if($row = mssql_fetch_array($result_id))
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{
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$this->next_id[$this->db_connect_id] = $row['id'];
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$this->affected_rows[$this->db_connect_id] = $row['affected'];
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}
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}
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}
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}
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else
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{
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if(mssql_query($query, $this->db_connect_id))
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{
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$this->result = time() + microtime();
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$result_id = mssql_query("SELECT @@ROWCOUNT as affected", $this->db_connect_id);
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if($result_id)
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{
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if($row = mssql_fetch_array($result_id))
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{
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$this->affected_rows[$this->db_connect_id] = $row['affected'];
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}
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}
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}
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}
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if(!$this->result)
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{
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if($this->in_transaction)
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{
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mssql_query("ROLLBACK", $this->db_connect_id);
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$this->in_transaction = FALSE;
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}
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return false;
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}
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if($transaction == END_TRANSACTION && $this->in_transaction)
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{
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$this->in_transaction = FALSE;
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if(!@mssql_query("COMMIT", $this->db_connect_id))
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{
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@mssql_query("ROLLBACK", $this->db_connect_id);
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return false;
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}
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}
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return $this->result;
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}
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else
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{
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if($transaction == END_TRANSACTION && $this->in_transaction )
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{
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$this->in_transaction = FALSE;
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if(!@mssql_query("COMMIT", $this->db_connect_id))
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{
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@mssql_query("ROLLBACK", $this->db_connect_id);
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return false;
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}
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}
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return true;
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}
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}
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//
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// Other query methods
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//
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function sql_numrows($query_id = 0)
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{
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if(!$query_id)
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{
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$query_id = $this->result;
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}
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if($query_id)
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{
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return (!empty($this->limit_offset[$query_id])) ? mssql_num_rows($query_id) - $this->limit_offset[$query_id] : @mssql_num_rows($query_id);
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}
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else
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{
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return false;
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}
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}
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function sql_numfields($query_id = 0)
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{
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if(!$query_id)
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{
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$query_id = $this->result;
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}
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return ($query_id) ? mssql_num_fields($query_id) : false;
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}
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function sql_fieldname($offset, $query_id = 0)
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{
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if(!$query_id)
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{
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$query_id = $this->result;
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}
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return ($query_id) ? mssql_field_name($query_id, $offset) : false;
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}
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function sql_fieldtype($offset, $query_id = 0)
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{
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if(!$query_id)
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{
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$query_id = $this->result;
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}
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return ($query_id) ? mssql_field_type($query_id, $offset) : false;
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}
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function sql_fetchrow($query_id = 0)
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{
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if(!$query_id)
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{
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$query_id = $this->result;
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}
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if($query_id)
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{
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empty($row);
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$row = mssql_fetch_array($query_id);
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while(list($key, $value) = @each($row))
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{
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$row[$key] = stripslashes($value);
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}
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return $row;
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}
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else
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{
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return false;
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}
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}
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function sql_fetchrowset($query_id = 0)
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{
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if(!$query_id)
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{
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$query_id = $this->result;
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}
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if($query_id)
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{
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$i = 0;
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empty($rowset);
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while($row = mssql_fetch_array($query_id))
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{
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while(list($key, $value) = @each($row))
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{
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$rowset[$i][$key] = stripslashes($value);
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}
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$i++;
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}
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return $rowset;
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}
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else
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{
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return false;
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}
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}
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function sql_fetchfield($field, $row = -1, $query_id)
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{
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if(!$query_id)
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{
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$query_id = $this->result;
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}
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if($query_id)
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{
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if($row != -1)
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{
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if($this->limit_offset[$query_id] > 0)
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{
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$result = (!empty($this->limit_offset[$query_id])) ? mssql_result($this->result, ($this->limit_offset[$query_id] + $row), $field) : false;
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}
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else
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{
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$result = mssql_result($this->result, $row, $field);
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}
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}
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else
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{
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if(empty($this->row[$query_id]))
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{
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$this->row[$query_id] = mssql_fetch_array($query_id);
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$result = stripslashes($this->row[$query_id][$field]);
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}
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}
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return $result;
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}
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else
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{
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return false;
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}
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}
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function sql_rowseek($rownum, $query_id = 0)
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{
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if(!$query_id)
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{
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$query_id = $this->result;
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}
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if($query_id)
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{
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return (!empty($this->limit_offset[$query_id])) ? mssql_data_seek($query_id, ($this->limit_offset[$query_id] + $rownum)) : mssql_data_seek($query_id, $rownum);
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}
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else
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{
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return false;
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}
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}
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function sql_nextid()
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{
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return ($this->next_id[$this->db_connect_id]) ? $this->next_id[$this->db_connect_id] : false;
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}
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function sql_affectedrows()
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{
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return ($this->affected_rows[$this->db_connect_id]) ? $this->affected_rows[$this->db_connect_id] : false;
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}
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function sql_freeresult($query_id = 0)
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{
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if(!$query_id)
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{
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$query_id = $this->result;
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}
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return ($query_id) ? mssql_free_result($query_id) : false;
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}
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function sql_escape($msg)
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{
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return str_replace("'", "''", str_replace('\\', '\\\\', $msg));
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}
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function sql_error($sql = '')
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{
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if (!$this->return_on_error)
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{
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$this_page = (!empty($_SERVER['PHP_SELF'])) ? $_SERVER['PHP_SELF'] : $_ENV['PHP_SELF'];
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$this_page .= '&' . ((!empty($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : $_ENV['QUERY_STRING']);
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$message = '<u>SQL ERROR</u> [ ' . SQL_LAYER . ' ]<br /><br />' . @mssql_get_last_message() . '<br /><br /><u>CALLING PAGE</u><br /><br />' . htmlspecialchars($this_page) . (($sql != '') ? '<br /><br /><u>SQL</u><br /><br />' . $sql : '') . '<br />';
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if ($this->transaction)
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{
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$this->sql_transaction('rollback');
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}
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trigger_error($message, E_USER_ERROR);
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}
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$result = array(
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'message' => @mssql_get_last_message(),
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'code' => ''
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);
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return $result;
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}
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} // class sql_db
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} // if ... define
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?>
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