Issues in ElggStaticVariableCache.php (master) - Issues in master - gctools-outilsgc/gcconnex - Measure and Improve Code Quality continuously with Scrutinizer

Issues (2473)

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Cross-Site Scripting

Cross-Site Scripting enables an attacker to inject code into the response of a web-request that is viewed by other users. It can for example be used to bypass access controls, or even to take over other users' accounts.

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Response Splitting can be used to send arbitrary responses.

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XPath Injection

XPath Injection enables an attacker to modify the parts of XML document that are read. If that XML document is for example used for authentication, this can lead to further vulnerabilities similar to SQL Injection.

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Header Injection

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XML Injection enables an attacker to read files on your local filesystem including configuration files, or can be abused to freeze your web-server process.

Variable Injection

Variable Injection enables an attacker to overwrite program variables with custom data, and can lead to further vulnerabilities.

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engine/classes/ElggStaticVariableCache.php (1 issue)

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<?php
/**
 * \ElggStaticVariableCache
 * Dummy cache which stores values in a static array. Using this makes future
 * replacements to other caching back ends (eg memcache) much easier.
 *
 * @package    Elgg.Core
 * @subpackage Cache
 */
class ElggStaticVariableCache extends \ElggSharedMemoryCache {
	/**
	 * The cache.
	 *
	 * @var array
	 */
	private static $__cache;

	/**
	 * Create the variable cache.
	 *
	 * This function creates a variable cache in a static variable in
	 * memory, optionally with a given namespace (to avoid overlap).
	 *
	 * @param string $namespace The namespace for this cache to write to.
	 * @warning namespaces of the same name are shared!
	 */
	public function __construct($namespace = 'default') {
		$this->setNamespace($namespace);
		$this->clear();
	}

	/**
	 * Save a key
	 *
	 * @param string $key  Name
	 * @param string $data Value
	 *
	 * @return boolean
	 */
	public function save($key, $data) {
		$namespace = $this->getNamespace();

		\ElggStaticVariableCache::$__cache[$namespace][$key] = $data;

		return true;
	}

	/**
	 * Load a key
	 *
	 * @param string $key    Name
	 * @param int    $offset Offset
	 * @param int    $limit  Limit
	 *
	 * @return string
	 */
	public function load($key, $offset = 0, $limit = null) {
		$namespace = $this->getNamespace();

		if (isset(\ElggStaticVariableCache::$__cache[$namespace][$key])) {
			return \ElggStaticVariableCache::$__cache[$namespace][$key];
		}

		return false;
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
	}

	/**
	 * Invalidate a given key.
	 *
	 * @param string $key Name
	 *
	 * @return bool
	 */
	public function delete($key) {
		$namespace = $this->getNamespace();

		unset(\ElggStaticVariableCache::$__cache[$namespace][$key]);

		return true;
	}

	/**
	 * Clears the cache for a particular namespace
	 *
	 * @return void
	 */
	public function clear() {
		$namespace = $this->getNamespace();

		if (!isset(\ElggStaticVariableCache::$__cache)) {
			\ElggStaticVariableCache::$__cache = array();
		}

		\ElggStaticVariableCache::$__cache[$namespace] = array();
	}
}


1		<?php
2		/**
3		* \ElggStaticVariableCache
4		* Dummy cache which stores values in a static array. Using this makes future
5		* replacements to other caching back ends (eg memcache) much easier.
6		*
7		* @package Elgg.Core
8		* @subpackage Cache
9		*/
10		class ElggStaticVariableCache extends \ElggSharedMemoryCache {
11		/**
12		* The cache.
13		*
14		* @var array
15		*/
16		private static $__cache;
17
18		/**
19		* Create the variable cache.
20		*
21		* This function creates a variable cache in a static variable in
22		* memory, optionally with a given namespace (to avoid overlap).
23		*
24		* @param string $namespace The namespace for this cache to write to.
25		* @warning namespaces of the same name are shared!
26		*/
27	2	public function __construct($namespace = 'default') {
28	2	$this->setNamespace($namespace);
29	2	$this->clear();
30	2	}
31
32		/**
33		* Save a key
34		*
35		* @param string $key Name
36		* @param string $data Value
37		*
38		* @return boolean
39		*/
40		public function save($key, $data) {
41		$namespace = $this->getNamespace();
42
43		\ElggStaticVariableCache::$__cache[$namespace][$key] = $data;
44
45		return true;
46		}
47
48		/**
49		* Load a key
50		*
51		* @param string $key Name
52		* @param int $offset Offset
53		* @param int $limit Limit
54		*
55		* @return string
56		*/
57		public function load($key, $offset = 0, $limit = null) {
58		$namespace = $this->getNamespace();
59
60		if (isset(\ElggStaticVariableCache::$__cache[$namespace][$key])) {
61		return \ElggStaticVariableCache::$__cache[$namespace][$key];
62		}
63
64		return false;
		0 ignored issues – show Bug Best Practice introduced 2017-09-27 16:16 UTC by Report Bug Copy Issue Report Show Similar Issues like this The return type of `return false;` (`false`) is incompatible with the return type documented by `ElggStaticVariableCache::load` of type `string`. If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design. Let’s take a look at an example: class Author { private $name; public function __construct($name) { $this->name = $name; } public function getName() { return $this->name; } } abstract class Post { public function getAuthor() { return 'Johannes'; } } class BlogPost extends Post { public function getAuthor() { return new Author('Johannes'); } } class ForumPost extends Post { /* ... */ } function my_function(Post $post) { echo strtoupper($post->getAuthor()); } Our function `my_function` expects a `Post` object, and outputs the author of the post. The base class `Post` returns a simple string and outputting a simple string will work just fine. However, the child class `BlogPost` which is a sub-type of `Post` instead decided to return an `object`, and is therefore violating the SOLID principles. If a `BlogPost` were passed to `my_function`, PHP would not complain, but ultimately fail when executing the `strtoupper` call in its body. Loading history...
65		}
66
67		/**
68		* Invalidate a given key.
69		*
70		* @param string $key Name
71		*
72		* @return bool
73		*/
74		public function delete($key) {
75		$namespace = $this->getNamespace();
76
77		unset(\ElggStaticVariableCache::$__cache[$namespace][$key]);
78
79		return true;
80		}
81
82		/**
83		* Clears the cache for a particular namespace
84		*
85		* @return void
86		*/
87	4	public function clear() {
88	4	$namespace = $this->getNamespace();
89
90	4	if (!isset(\ElggStaticVariableCache::$__cache)) {
91	1	\ElggStaticVariableCache::$__cache = array();
92	1	}
93
94	4	\ElggStaticVariableCache::$__cache[$namespace] = array();
95	4	}
96		}
97

gctools-outilsgc / gcconnex

Issues (2473)

Security Analysis no vulnerabilities found

engine/classes/ElggStaticVariableCache.php (1 issue)

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