This project does not seem to handle request data directly as such no vulnerable execution paths were found.
include
, or for example
via PHP's auto-loading mechanism.
These results are based on our legacy PHP analysis, consider migrating to our new PHP analysis engine instead. Learn more
1 | <?php |
||
2 | |||
3 | /** |
||
4 | * position-calculator.php. |
||
5 | * |
||
6 | * This file implements the calculator for the position elements of |
||
7 | * the output of the PHPSQLParser. |
||
8 | * |
||
9 | * Copyright (c) 2010-2012, Justin Swanhart |
||
10 | * with contributions by André Rothe <[email protected], [email protected]> |
||
11 | * |
||
12 | * All rights reserved. |
||
13 | * |
||
14 | * Redistribution and use in source and binary forms, with or without modification, |
||
15 | * are permitted provided that the following conditions are met: |
||
16 | * |
||
17 | * * Redistributions of source code must retain the above copyright notice, |
||
18 | * this list of conditions and the following disclaimer. |
||
19 | * * Redistributions in binary form must reproduce the above copyright notice, |
||
20 | * this list of conditions and the following disclaimer in the documentation |
||
21 | * and/or other materials provided with the distribution. |
||
22 | * |
||
23 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY |
||
24 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
||
25 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
||
26 | * SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
27 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED |
||
28 | * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
||
29 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
||
30 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
||
31 | * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH |
||
32 | * DAMAGE. |
||
33 | */ |
||
34 | namespace SQLParser; |
||
35 | |||
36 | /** |
||
37 | * This class calculates the positions |
||
38 | * of base_expr within the original SQL statement. |
||
39 | * |
||
40 | * @author arothe |
||
41 | */ |
||
42 | class PositionCalculator extends PHPSQLParserUtils |
||
43 | { |
||
44 | private static $allowedOnOperator = array("\t", "\n", "\r", ' ', ',', '(', ')', '_', "'", '"'); |
||
45 | private static $allowedOnOther = array("\t", "\n", "\r", ' ', ',', '(', ')', '<', '>', '*', '+', '-', '/', '|', |
||
46 | '&', '=', '!', ';', ); |
||
47 | |||
48 | private function printPos($text, $sql, $charPos, $key, $parsed, $backtracking) |
||
0 ignored issues
–
show
Unused Code
introduced
by
![]() printPos uses the super-global variable $_ENV which is generally not recommended.
Instead of super-globals, we recommend to explicitly inject the dependencies of your class. This makes your code less dependent on global state and it becomes generally more testable: // Bad
class Router
{
public function generate($path)
{
return $_SERVER['HOST'].$path;
}
}
// Better
class Router
{
private $host;
public function __construct($host)
{
$this->host = $host;
}
public function generate($path)
{
return $this->host.$path;
}
}
class Controller
{
public function myAction(Request $request)
{
// Instead of
$page = isset($_GET['page']) ? intval($_GET['page']) : 1;
// Better (assuming you use the Symfony2 request)
$page = $request->query->get('page', 1);
}
}
![]() |
|||
49 | { |
||
50 | if (!isset($_ENV['DEBUG'])) { |
||
51 | return; |
||
52 | } |
||
53 | |||
54 | $spaces = ''; |
||
55 | $caller = debug_backtrace(); |
||
56 | $i = 1; |
||
57 | while ($caller[$i]['function'] === 'lookForBaseExpression') { |
||
58 | $spaces .= ' '; |
||
59 | ++$i; |
||
60 | } |
||
61 | $holdem = substr($sql, 0, $charPos).'^'.substr($sql, $charPos); |
||
62 | echo $spaces.$text.' key:'.$key.' parsed:'.$parsed.' back:'.serialize($backtracking).' ' |
||
63 | .$holdem."\n"; |
||
64 | } |
||
65 | |||
66 | public function setPositionsWithinSQL($sql, $parsed) |
||
67 | { |
||
68 | $charPos = 0; |
||
69 | $backtracking = array(); |
||
70 | $this->lookForBaseExpression($sql, $charPos, $parsed, 0, $backtracking); |
||
71 | |||
72 | return $parsed; |
||
73 | } |
||
74 | |||
75 | private function findPositionWithinString($sql, $value, $expr_type) |
||
76 | { |
||
77 | $offset = 0; |
||
78 | $ok = false; |
||
0 ignored issues
–
show
$ok is not used, you could remove the assignment.
This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently. $myVar = 'Value';
$higher = false;
if (rand(1, 6) > 3) {
$higher = true;
} else {
$higher = false;
}
Both the ![]() |
|||
79 | while (true) { |
||
80 | $pos = strpos($sql, $value, $offset); |
||
81 | if ($pos === false) { |
||
82 | break; |
||
83 | } |
||
84 | |||
85 | $before = ''; |
||
86 | if ($pos > 0) { |
||
87 | $before = $sql[$pos - 1]; |
||
88 | } |
||
89 | |||
90 | $after = ''; |
||
91 | if (isset($sql[$pos + strlen($value)])) { |
||
92 | $after = $sql[$pos + strlen($value)]; |
||
93 | } |
||
94 | |||
95 | # if we have an operator, it should be surrounded by |
||
96 | # whitespace, comma, parenthesis, digit or letter, end_of_string |
||
97 | # an operator should not be surrounded by another operator |
||
98 | |||
99 | if ($expr_type === 'operator') { |
||
100 | $ok = ($before === '' || in_array($before, self::$allowedOnOperator, true)) |
||
101 | || (strtolower($before) >= 'a' && strtolower($before) <= 'z') |
||
102 | || ($before >= '0' && $before <= '9'); |
||
103 | $ok = $ok |
||
104 | && ($after === '' || in_array($after, self::$allowedOnOperator, true) |
||
105 | || (strtolower($after) >= 'a' && strtolower($after) <= 'z') |
||
106 | || ($after >= '0' && $after <= '9') || ($after === '?') || ($after === '@')); |
||
107 | |||
108 | if (!$ok) { |
||
109 | $offset = $pos + 1; |
||
110 | continue; |
||
111 | } |
||
112 | |||
113 | break; |
||
114 | } |
||
115 | |||
116 | # in all other cases we accept |
||
117 | # whitespace, comma, operators, parenthesis and end_of_string |
||
118 | |||
119 | $ok = ($before === '' || in_array($before, self::$allowedOnOther, true)); |
||
120 | $ok = $ok && ($after === '' || in_array($after, self::$allowedOnOther, true)); |
||
121 | |||
122 | if ($ok) { |
||
123 | break; |
||
124 | } |
||
125 | |||
126 | $offset = $pos + 1; |
||
127 | } |
||
128 | |||
129 | return $pos; |
||
0 ignored issues
–
show
The variable
$pos does not seem to be defined for all execution paths leading up to this point.
If you define a variable conditionally, it can happen that it is not defined for all execution paths. Let’s take a look at an example: function myFunction($a) {
switch ($a) {
case 'foo':
$x = 1;
break;
case 'bar':
$x = 2;
break;
}
// $x is potentially undefined here.
echo $x;
}
In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined. Available Fixes
![]() |
|||
130 | } |
||
131 | |||
132 | private function lookForBaseExpression($sql, &$charPos, &$parsed, $key, &$backtracking) |
||
133 | { |
||
134 | if (!is_numeric($key)) { |
||
135 | if (($key === 'UNION' || $key === 'UNION ALL') |
||
136 | || ($key === 'expr_type' && $parsed === ExpressionType::EXPRESSION) |
||
137 | || ($key === 'expr_type' && $parsed === ExpressionType::SUBQUERY) |
||
138 | || ($key === 'expr_type' && $parsed === ExpressionType::BRACKET_EXPRESSION) |
||
139 | || ($key === 'expr_type' && $parsed === ExpressionType::TABLE_EXPRESSION) |
||
140 | || ($key === 'expr_type' && $parsed === ExpressionType::RECORD) |
||
141 | || ($key === 'expr_type' && $parsed === ExpressionType::IN_LIST) |
||
142 | || ($key === 'expr_type' && $parsed === ExpressionType::MATCH_ARGUMENTS) |
||
143 | || ($key === 'alias' && $parsed !== false)) { |
||
144 | # we hold the current position and come back after the next base_expr |
||
145 | # we do this, because the next base_expr contains the complete expression/subquery/record |
||
146 | # and we have to look into it too |
||
147 | $backtracking[] = $charPos; |
||
148 | } elseif (($key === 'ref_clause' || $key === 'columns') && $parsed !== false) { |
||
149 | # we hold the current position and come back after n base_expr(s) |
||
150 | # there is an array of sub-elements before (!) the base_expr clause of the current element |
||
151 | # so we go through the sub-elements and must come at the end |
||
152 | $backtracking[] = $charPos; |
||
153 | View Code Duplication | for ($i = 1; $i < count($parsed); ++$i) { |
|
0 ignored issues
–
show
It seems like you are calling the size function
count() as part of the test condition. You might want to compute the size beforehand, and not on each iteration.
If the size of the collection does not change during the iteration, it is generally a good practice to compute it beforehand, and not on each iteration: for ($i=0; $i<count($array); $i++) { // calls count() on each iteration
}
// Better
for ($i=0, $c=count($array); $i<$c; $i++) { // calls count() just once
}
![]() This code seems to be duplicated across your project.
Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. ![]() |
|||
154 | $backtracking[] = false; # backtracking only after n base_expr! |
||
155 | } |
||
156 | } elseif ($key === 'sub_tree' && $parsed !== false) { |
||
157 | # we prevent wrong backtracking on subtrees (too much array_pop()) |
||
158 | # there is an array of sub-elements after(!) the base_expr clause of the current element |
||
159 | # so we go through the sub-elements and must not come back at the end |
||
160 | View Code Duplication | for ($i = 1; $i < count($parsed); ++$i) { |
|
0 ignored issues
–
show
It seems like you are calling the size function
count() as part of the test condition. You might want to compute the size beforehand, and not on each iteration.
If the size of the collection does not change during the iteration, it is generally a good practice to compute it beforehand, and not on each iteration: for ($i=0; $i<count($array); $i++) { // calls count() on each iteration
}
// Better
for ($i=0, $c=count($array); $i<$c; $i++) { // calls count() just once
}
![]() This code seems to be duplicated across your project.
Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. ![]() |
|||
161 | $backtracking[] = false; |
||
162 | } |
||
163 | } else { |
||
164 | # move the current pos after the keyword |
||
165 | # SELECT, WHERE, INSERT etc. |
||
166 | if (in_array($key, parent::$reserved)) { |
||
167 | $charPos = stripos($sql, $key, $charPos); |
||
168 | $charPos += strlen($key); |
||
169 | } |
||
170 | } |
||
171 | } |
||
172 | |||
173 | if (!is_array($parsed)) { |
||
174 | return; |
||
175 | } |
||
176 | |||
177 | foreach ($parsed as $key => $value) { |
||
178 | if ($key === 'base_expr') { |
||
179 | |||
180 | #$this->printPos("0", $sql, $charPos, $key, $value, $backtracking); |
||
0 ignored issues
–
show
Unused Code
Comprehensibility
introduced
by
73% of this comment could be valid code. Did you maybe forget this after debugging?
Sometimes obsolete code just ends up commented out instead of removed. In this case it is better to remove the code once you have checked you do not need it. The code might also have been commented out for debugging purposes. In this case it is vital that someone uncomments it again or your project may behave in very unexpected ways in production. This check looks for comments that seem to be mostly valid code and reports them. ![]() |
|||
181 | |||
182 | $subject = substr($sql, $charPos); |
||
183 | $pos = $this->findPositionWithinString($subject, $value, |
||
184 | isset($parsed['expr_type']) ? $parsed['expr_type'] : 'alias'); |
||
185 | if ($pos === false) { |
||
186 | throw new UnableToCalculatePositionException($value, $subject); |
||
187 | } |
||
188 | |||
189 | $parsed['position'] = $charPos + $pos; |
||
190 | $charPos += $pos + strlen($value); |
||
191 | |||
192 | #$this->printPos("1", $sql, $charPos, $key, $value, $backtracking); |
||
0 ignored issues
–
show
Unused Code
Comprehensibility
introduced
by
73% of this comment could be valid code. Did you maybe forget this after debugging?
Sometimes obsolete code just ends up commented out instead of removed. In this case it is better to remove the code once you have checked you do not need it. The code might also have been commented out for debugging purposes. In this case it is vital that someone uncomments it again or your project may behave in very unexpected ways in production. This check looks for comments that seem to be mostly valid code and reports them. ![]() |
|||
193 | |||
194 | $oldPos = array_pop($backtracking); |
||
195 | if (isset($oldPos) && $oldPos !== false) { |
||
196 | $charPos = $oldPos; |
||
197 | } |
||
198 | |||
199 | #$this->printPos("2", $sql, $charPos, $key, $value, $backtracking); |
||
0 ignored issues
–
show
Unused Code
Comprehensibility
introduced
by
73% of this comment could be valid code. Did you maybe forget this after debugging?
Sometimes obsolete code just ends up commented out instead of removed. In this case it is better to remove the code once you have checked you do not need it. The code might also have been commented out for debugging purposes. In this case it is vital that someone uncomments it again or your project may behave in very unexpected ways in production. This check looks for comments that seem to be mostly valid code and reports them. ![]() |
|||
200 | } else { |
||
201 | $this->lookForBaseExpression($sql, $charPos, $parsed[$key], $key, $backtracking); |
||
202 | } |
||
203 | } |
||
204 | } |
||
205 | } |
||
206 |