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<?php |
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/** |
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* |
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* This file is part of Aura for PHP. |
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* |
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* @license http://opensource.org/licenses/bsd-license.php BSD |
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* |
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*/ |
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namespace Aura\Filter\Rule\Validate; |
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/** |
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* |
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* Validates the value as a URL. |
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* |
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* @package Aura.Filter |
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* |
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*/ |
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class Url |
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{ |
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/** |
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* |
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* Validates the value as a URL. |
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* |
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* The value must match a generic URL format; for example, |
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* ``http://example.com``, ``mms://example.org``, and so on. |
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* |
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* @param object $subject The subject to be filtered. |
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* |
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* @param string $field The subject field name. |
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* |
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* @return bool True if valid, false if not. |
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* |
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*/ |
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public function __invoke($subject, $field) |
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{ |
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$value = $subject->$field; |
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if (! is_scalar($value)) { |
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return false; |
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} |
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// first, make sure there are no invalid chars, list from ext/filter |
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$other = "$-_.+" // safe |
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. "!*'()," // extra |
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. "{}|\\^~[]`" // national |
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. "<>#%\"" // punctuation |
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. ";/?:@&="; // reserved |
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$valid = 'a-zA-Z0-9' . preg_quote($other, '/'); |
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$clean = preg_replace("/[^$valid]/", '', $value); |
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if ($value != $clean) { |
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return false; |
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} |
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// now make sure it parses as a URL with scheme and host |
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$result = @parse_url($value); |
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if (empty($result['scheme']) || trim($result['scheme']) == '' || |
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empty($result['host']) || trim($result['host']) == '') { |
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// need a scheme and host |
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return false; |
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} else { |
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// looks ok |
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return true; |
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} |
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} |
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} |
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auraphp /
Aura.Filter
