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<?php |
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/** |
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* Act as whitelist (or blacklist). |
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* |
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*/ |
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class CWhitelist |
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{ |
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/** |
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* Array to contain the whitelist options. |
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*/ |
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private $whitelist = array(); |
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/** |
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* Set the whitelist from an array of strings, each item in the |
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* whitelist should be a regexp without the surrounding / or #. |
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* |
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* @param array $whitelist with all valid options, |
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* default is to clear the whitelist. |
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* |
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* @return $this |
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*/ |
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public function set($whitelist = array()) |
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{ |
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if (!is_array($whitelist)) { |
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throw new Exception("Whitelist is not of a supported format."); |
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} |
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$this->whitelist = $whitelist; |
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return $this; |
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} |
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/** |
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* Check if item exists in the whitelist. |
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* |
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* @param string $item string to check. |
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* @param array $whitelist optional with all valid options, default is null. |
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* |
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* @return boolean true if item is in whitelist, else false. |
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*/ |
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public function check($item, $whitelist = null) |
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{ |
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if ($whitelist !== null) { |
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$this->set($whitelist); |
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} |
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if (empty($item) or empty($this->whitelist)) { |
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return false; |
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} |
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foreach ($this->whitelist as $regexp) { |
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if (preg_match("#$regexp#", $item)) { |
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return true; |
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} |
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} |
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return false; |
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} |
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} |
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mosbth /
cimage
