1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
<?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_comments will strip the sql comment lines out of an uploaded sql file
// specifically for mssql and postgres type files in the install....
//
function remove_comments($sql)
{
$lines = explode("\n", $sql);
// try to keep mem. use down
$sql = "";
$linecount = count($lines);
$output = "";
$in_comment = false;
for($i = 0; $i < $linecount; $i++)
{
if(ereg("^\/\*", $lines[$i])
{
$in_comment = true;
}
if(ereg("\*\/$", $lines[$i])
{
$in_comment = false;
}
if(!$in_comment)
{
$output .= $lines[$i] . "\n";
}
$lines[$i] = '';
}
return $output;
}
//
// remove_remarks will strip the sql comment lines out of an uploaded sql file
//
function remove_remarks($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] . $delimiter . $tokens[$i + 1];
// save memory.
$tokens[$i] = "";
}
}
}
return $output;
}
?>
|
