FunctionAvailabilityCheck - Code Metrics - tenside/core - Measure and Improve Code Quality continuously with Scrutinizer

FunctionAvailabilityCheck A
last analyzed 2017-04-24 14:24 UTC

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Complexity

Total Complexity

Size/Duplication

Total Lines	113
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	0

Importance

Changes

Metric	Value
wmc	14
lcom	1
cbo	0
dl	0
loc	113
rs	10
c	0
b	0
f	0

6 Methods

Rating	Name	Size	Complexity
B	isFunctionEnabled()	8	5
A	isFunctionDefined()	4	1
A	isFunctionBlacklistedInSuhosin()	12	3
A	isFunctionBlacklistedInPhpIni()	8	2
A	isFunctionsMentionedInList()	8	2
A	prepareList()	4	1

<?php

/**
 * This file is part of tenside/core.
 *
 * (c) Christian Schiffler <[email protected]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 *
 * This project is provided in good faith and hope to be usable by anyone.
 *
 * @package    tenside/core
 * @author     Christian Schiffler <[email protected]>
 * @copyright  2015 Christian Schiffler <[email protected]>
 * @license    https://github.com/tenside/core/blob/master/LICENSE MIT
 * @link       https://github.com/tenside/core
 * @filesource
 */

namespace Tenside\Core\Util;

/**
 * This class provides methods to check if certain functions have been disabled in PHP or are callable.
 */
class FunctionAvailabilityCheck
{
    /**
     * Cache.
     *
     * @var string[]
     */
    private static $blackListSuhosin;

    /**
     * Cache.
     *
     * @var string[]
     */
    private static $blackListPhpIni;


    /**
     * Check if function is defined.
     *
     * @param string      $function  The function to test.
     *
     * @param string|null $extension The optional name of an php extension providing said function.
     *
     * @return bool
     */
    public static function isFunctionEnabled($function, $extension = null)
    {
        return
            (null === $extension || extension_loaded($extension))
            && !static::isFunctionBlacklistedInPhpIni($function)
            && !static::isFunctionBlacklistedInSuhosin($function)
            && static::isFunctionDefined($function);
    }

    /**
     * Check if function is defined.
     *
     * @param string $function The function to test.
     *
     * @return bool
     */
    public static function isFunctionDefined($function)
    {
        return function_exists($function);
    }

    /**
     * Check if function is blacklisted in Suhosin.
     *
     * @param string $function The function to test.
     *
     * @return bool
     */
    public static function isFunctionBlacklistedInSuhosin($function)
    {
        if (!extension_loaded('suhosin')) {
            return false;
        }

        if (!isset(self::$blackListSuhosin)) {
            self::$blackListSuhosin = static::prepareList(ini_get('suhosin.executor.func.blacklist'));
class YourClass
{
    private static function getTemperature() {
        return "3422 °C";
}

public static function getSomeVariable()
{
    return static::getTemperature();
}
        }

        return static::isFunctionsMentionedInList($function, self::$blackListSuhosin);
    }

    /**
     * Check if method is blacklisted in Suhosin.
     *
     * @param string $function The function to test.
     *
     * @return bool
     */
    public static function isFunctionBlacklistedInPhpIni($function)
    {
        if (!isset(self::$blackListPhpIni)) {
            self::$blackListPhpIni = static::prepareList(ini_get('disable_functions'));
class YourClass
{
    private static function getTemperature() {
        return "3422 °C";
}

public static function getSomeVariable()
{
    return static::getTemperature();
}
        }

        return static::isFunctionsMentionedInList($function, self::$blackListPhpIni);
    }

    /**
     * Check if a function is mentioned in the passed (comma separated) list.
     *
     * @param string   $function The function to test.
     *
     * @param string[] $list     The function list.
     *
     * @return bool
     */
    public static function isFunctionsMentionedInList($function, $list)
    {
        if (empty($list)) {
            return false;
        }

        return (false !== array_search($function, $list));
    }

    /**
     * Explode a list.
     *
     * @param string $list The list.
     *
     * @return string[]
     */
    private static function prepareList($list)
    {
        return array_map('strtolower', array_map('trim', explode(',', $list, -1)));
    }
}


1			<?php
2
3			/**
4			* This file is part of tenside/core.
5			*
6			* (c) Christian Schiffler <[email protected]>
7			*
8			* For the full copyright and license information, please view the LICENSE
9			* file that was distributed with this source code.
10			*
11			* This project is provided in good faith and hope to be usable by anyone.
12			*
13			* @package tenside/core
14			* @author Christian Schiffler <[email protected]>
15			* @copyright 2015 Christian Schiffler <[email protected]>
16			* @license https://github.com/tenside/core/blob/master/LICENSE MIT
17			* @link https://github.com/tenside/core
18			* @filesource
19			*/
20
21			namespace Tenside\Core\Util;
22
23			/**
24			* This class provides methods to check if certain functions have been disabled in PHP or are callable.
25			*/
26			class FunctionAvailabilityCheck
27			{
28			/**
29			* Cache.
30			*
31			* @var string[]
32			*/
33			private static $blackListSuhosin;
34
35			/**
36			* Cache.
37			*
38			* @var string[]
39			*/
40			private static $blackListPhpIni;
41
42
43			/**
44			* Check if function is defined.
45			*
46			* @param string $function The function to test.
47			*
48			* @param string\|null $extension The optional name of an php extension providing said function.
49			*
50			* @return bool
51			*/
52			public static function isFunctionEnabled($function, $extension = null)
53			{
54			return
55			(null === $extension \|\| extension_loaded($extension))
56			&& !static::isFunctionBlacklistedInPhpIni($function)
57			&& !static::isFunctionBlacklistedInSuhosin($function)
58			&& static::isFunctionDefined($function);
59			}
60
61			/**
62			* Check if function is defined.
63			*
64			* @param string $function The function to test.
65			*
66			* @return bool
67			*/
68			public static function isFunctionDefined($function)
69			{
70			return function_exists($function);
71			}
72
73			/**
74			* Check if function is blacklisted in Suhosin.
75			*
76			* @param string $function The function to test.
77			*
78			* @return bool
79			*/
80			public static function isFunctionBlacklistedInSuhosin($function)
81			{
82			if (!extension_loaded('suhosin')) {
83			return false;
84			}
85
86			if (!isset(self::$blackListSuhosin)) {
87			self::$blackListSuhosin = static::prepareList(ini_get('suhosin.executor.func.blacklist'));
			0 ignored issues – show Bug introduced 2015-11-24 04:55 UTC by Report Bug Copy Issue Report Since `prepareList()` is declared private, calling it with `static` will lead to errors in possible sub-classes. You can either use `self`, or increase the visibility of `prepareList()` to at least protected. Let’s assume you have a class which uses late-static binding: class YourClass { private static function getTemperature() { return "3422 °C"; } public static function getSomeVariable() { return static::getTemperature(); } } The code above will run fine in your PHP runtime. However, if you now create a sub-class and call the `getSomeVariable()` on that sub-class, you will receive a runtime error: class YourSubClass extends YourClass { private static function getTemperature() { return "-182 °C"; } } print YourSubClass::getSomeVariable(); // Will cause an access error. In the case above, it makes sense to update `SomeClass` to use `self` instead: class YourClass { private static function getTemperature() { return "3422 °C"; } public static function getSomeVariable() { return self::getTemperature(); } } Loading history...
88			}
89
90			return static::isFunctionsMentionedInList($function, self::$blackListSuhosin);
91			}
92
93			/**
94			* Check if method is blacklisted in Suhosin.
95			*
96			* @param string $function The function to test.
97			*
98			* @return bool
99			*/
100			public static function isFunctionBlacklistedInPhpIni($function)
101			{
102			if (!isset(self::$blackListPhpIni)) {
103			self::$blackListPhpIni = static::prepareList(ini_get('disable_functions'));
			0 ignored issues – show Bug introduced 2015-11-24 04:55 UTC by Report Bug Copy Issue Report Since `prepareList()` is declared private, calling it with `static` will lead to errors in possible sub-classes. You can either use `self`, or increase the visibility of `prepareList()` to at least protected. Let’s assume you have a class which uses late-static binding: class YourClass { private static function getTemperature() { return "3422 °C"; } public static function getSomeVariable() { return static::getTemperature(); } } The code above will run fine in your PHP runtime. However, if you now create a sub-class and call the `getSomeVariable()` on that sub-class, you will receive a runtime error: class YourSubClass extends YourClass { private static function getTemperature() { return "-182 °C"; } } print YourSubClass::getSomeVariable(); // Will cause an access error. In the case above, it makes sense to update `SomeClass` to use `self` instead: class YourClass { private static function getTemperature() { return "3422 °C"; } public static function getSomeVariable() { return self::getTemperature(); } } Loading history...
104			}
105
106			return static::isFunctionsMentionedInList($function, self::$blackListPhpIni);
107			}
108
109			/**
110			* Check if a function is mentioned in the passed (comma separated) list.
111			*
112			* @param string $function The function to test.
113			*
114			* @param string[] $list The function list.
115			*
116			* @return bool
117			*/
118			public static function isFunctionsMentionedInList($function, $list)
119			{
120			if (empty($list)) {
121			return false;
122			}
123
124			return (false !== array_search($function, $list));
125			}
126
127			/**
128			* Explode a list.
129			*
130			* @param string $list The list.
131			*
132			* @return string[]
133			*/
134			private static function prepareList($list)
135			{
136			return array_map('strtolower', array_map('trim', explode(',', $list, -1)));
137			}
138			}
139

tenside / core

FunctionAvailabilityCheck A last analyzed 2017-04-24 14:24 UTC

Complexity

Size/Duplication

Coupling/Cohesion

Importance

6 Methods

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FunctionAvailabilityCheck A
last analyzed 2017-04-24 14:24 UTC