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<?php |
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/* |
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* This file is part of the league/commonmark package. |
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* |
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* (c) Colin O'Dell <[email protected]> |
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* |
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* Original code based on the CommonMark JS reference parser (https://bitly.com/commonmark-js) |
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* - (c) John MacFarlane |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace League\CommonMark\Util; |
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class UrlEncoder |
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{ |
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protected static $dontEncode = [ |
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'%21' => '!', |
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'%23' => '#', |
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'%24' => '$', |
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'%26' => '&', |
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'%27' => '\'', |
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'%28' => '(', |
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'%29' => ')', |
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'%2A' => '*', |
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'%2B' => '+', |
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'%2C' => ',', |
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'%2D' => '-', |
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'%2E' => '.', |
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'%2F' => '/', |
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'%3A' => ':', |
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'%3B' => ';', |
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'%3D' => '=', |
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'%3F' => '?', |
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'%40' => '@', |
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'%5F' => '_', |
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'%7E' => '~', |
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]; |
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/** |
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* @param string $uri |
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* |
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* @return string |
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*/ |
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public static function unescapeAndEncode($uri) |
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{ |
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$decoded = html_entity_decode($uri); |
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return self::encode(self::decode($decoded)); |
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} |
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/** |
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* Decode a percent-encoded URI |
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* |
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* @param string $uri |
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* |
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* @return string |
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*/ |
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private static function decode($uri) |
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{ |
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return preg_replace_callback('/%([0-9a-f]{2})/iu', function($matches) { |
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// Convert percent-encoded codes to uppercase |
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$upper = strtoupper($matches[0]); |
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// Keep excluded characters as-is |
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if (array_key_exists($upper, self::$dontEncode)) { |
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return $upper; |
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} |
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// Otherwise, return the character for this codepoint |
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return chr(hexdec($matches[1])); |
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}, $uri); |
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} |
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/** |
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* Encode a URI, preserving already-encoded and excluded characters |
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* |
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* @param string $uri |
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* |
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* @return string |
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*/ |
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private static function encode($uri) |
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{ |
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return preg_replace_callback('/(%[0-9a-f]{2})|./iu', function($matches){ |
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// Keep already-encoded characters as-is |
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if (count($matches) > 1) { |
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return $matches[0]; |
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} |
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// Keep excluded characters as-is |
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543 |
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if (in_array($matches[0], self::$dontEncode)) { |
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return $matches[0]; |
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} |
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// Otherwise, encode the character |
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return rawurlencode($matches[0]); |
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}, $uri); |
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} |
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} |
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thephpleague /
commonmark
