Seperated out sql parsing functions into a new file.

git-svn-id: file:///svn/phpbb/trunk@1069 89ea8834-ac86-4346-8a33-228a782c2dd0
2025-07-30 05:20:56 +02:00 · 2001-09-24 17:26:36 +00:00
parent bc14000a95
commit 1871f5e2c0
2 changed files with 122 additions and 86 deletions
--- a/phpBB/includes/sql_parse.php
+++ b/phpBB/includes/sql_parse.php
@@ -0,0 +1,115 @@
+<?php
+/***************************************************************************
+*                             sql_parse.php
+*                              -------------------
+*     begin                : Thu May 31, 2001
+*     copyright            : (C) 2001 The phpBB Group
+*     email                : support@phpbb.com
+*
+*     $Id$
+*
+****************************************************************************/
+
+/***************************************************************************
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ ***************************************************************************/
+
+/***************************************************************************
+*
+*	These functions are mainly for use in the db_utilities under the admin
+*	however in order to make these functions available elsewhere, specifically
+*	in the installation phase of phpBB I have seperated out a couple of 
+*	functions into this file.  JLH
+*
+\***************************************************************************/
+
+//
+// remove_remarks will strip the sql comment lines out of an uploaded sql file
+//
+function remove_remarks($sql)
+{
+	$lines = explode("\n", $sql);
+	
+	// try to keep mem. use down
+	$sql = "";
+	
+	$linecount = count($lines);
+	$output = "";
+
+	for ($i = 0; $i < $linecount; $i++)
+	{
+		if (($i != ($linecount - 1)) || (strlen($lines[$i]) > 0))
+		{
+			if ($lines[$i][0] != "#")
+			{
+				$output .= $lines[$i] . "\n";
+			}
+			else
+			{
+				$output .= "\n";
+			}
+			// Trading a bit of speed for lower mem. use here.
+			$lines[$i] = "";
+		}
+	}
+	
+	return $output;
+	
+}
+
+//
+// split_sql_file will split an uploaded sql file into single sql statements.
+// Note: expects trim() to have already been run on $sql.
+//
+function split_sql_file($sql, $delimiter)
+{
+	// Split up our string into "possible" SQL statements.
+	$tokens = explode($delimiter, $sql);
+	// try to save memory.
+	$sql = "";
+	$output = array();
+	
+	// we don't actually care about the matches preg gives us.
+	$matches = array();
+	
+	// this is faster than calling count($oktens) every time thru the loop.
+	$token_count = count($tokens);
+	for ($i = 0; $i < $token_count; $i++)
+	{
+		// Don't wanna add an empty string as the last thing in the array.
+		if (($i != ($token_count - 1)) || (strlen($tokens[$i] > 0)))
+		{
+			// This is the total number of single quotes in the token.
+			$total_quotes = preg_match_all("/'/", $tokens[$i], $matches);
+			// Counts single quotes that are preceded by an odd number of backslashes, 
+			// which means they're escaped quotes.
+			$escaped_quotes = preg_match_all("/(?<!\\\\)(\\\\\\\\)*\\\\'/", $tokens[$i], $matches);
+			
+			$unescaped_quotes = $total_quotes - $escaped_quotes;
+			
+			// If the number of unescaped quotes is even, then the delimiter did NOT occur inside a string literal.
+			if (($unescaped_quotes % 2) == 0)
+			{
+				// It's a complete sql statement.
+				$output[] = $tokens[$i];
+				// save memory.
+				$tokens[$i] = "";
+			}
+			else
+			{
+				// it's not complete, so prepend it onto the next token and continue the loop as usual.
+				$tokens[$i + 1] = $tokens[$i] . ";" .  $tokens[$i + 1];
+				// save memory.
+				$tokens[$i] = "";
+			}
+		}
+	}
+
+	return $output;
+}
+?>