This file is indexed.

/usr/share/php/Twig/Extension/Escaper.php is in php-twig 2.4.6-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

 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
<?php

/*
 * This file is part of Twig.
 *
 * (c) Fabien Potencier
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

final class Twig_Extension_Escaper extends Twig_Extension
{
    private $defaultStrategy;

    /**
     * @param string|false|callable $defaultStrategy An escaping strategy
     *
     * @see setDefaultStrategy()
     */
    public function __construct($defaultStrategy = 'html')
    {
        $this->setDefaultStrategy($defaultStrategy);
    }

    public function getTokenParsers()
    {
        return array(new Twig_TokenParser_AutoEscape());
    }

    public function getNodeVisitors()
    {
        return array(new Twig_NodeVisitor_Escaper());
    }

    public function getFilters()
    {
        return array(
            new Twig_Filter('raw', 'twig_raw_filter', array('is_safe' => array('all'))),
        );
    }

    /**
     * Sets the default strategy to use when not defined by the user.
     *
     * The strategy can be a valid PHP callback that takes the template
     * name as an argument and returns the strategy to use.
     *
     * @param string|false|callable $defaultStrategy An escaping strategy
     */
    public function setDefaultStrategy($defaultStrategy)
    {
        if ('name' === $defaultStrategy) {
            $defaultStrategy = array('Twig_FileExtensionEscapingStrategy', 'guess');
        }

        $this->defaultStrategy = $defaultStrategy;
    }

    /**
     * Gets the default strategy to use when not defined by the user.
     *
     * @param string $name The template name
     *
     * @return string|false The default strategy to use for the template
     */
    public function getDefaultStrategy($name)
    {
        // disable string callables to avoid calling a function named html or js,
        // or any other upcoming escaping strategy
        if (!is_string($this->defaultStrategy) && false !== $this->defaultStrategy) {
            return call_user_func($this->defaultStrategy, $name);
        }

        return $this->defaultStrategy;
    }
}

/**
 * Marks a variable as being safe.
 *
 * @param string $string A PHP variable
 *
 * @return string
 */
function twig_raw_filter($string)
{
    return $string;
}

class_alias('Twig_Extension_Escaper', 'Twig\Extension\EscaperExtension', false);