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<?php $datasets = array( // Returns (bool) false. 'an index containing the delimiter' => array( 'permalink_structure' => '/index.php', 'index' => 'index.php#', ), // Returns (int) 1. 'empty index' => array( 'permalink_structure' => '/index.php', 'index' => '', ), // Returns (int) 0. 'an array for index' => array( 'permalink_structure' => '/index.php', 'index' => array( 'index.php' ), ), // Produces a Fatal Error. // 'an object for index' => array( // 'permalink_structure' => '/index.php', // 'index' => (object) array( 'index.php' ), // ), '(int) -1 for index' => array( 'permalink_structure' => '/index.php', 'index' => -1, ), '(int) 0 for index' => array( 'permalink_structure' => '/index.php', 'index' => 0, ), '(int) 1 for index' => array( 'permalink_structure' => '/index.php', 'index' => 1, ), '(float) -1.0 for index' => array( 'permalink_structure' => '/index.php', 'index' => -1.0, ), '(float) 0.0 for index' => array( 'permalink_structure' => '/index.php', 'index' => 0.0, ), '(float) 1.0 for index' => array( 'permalink_structure' => '/index.php', 'index' => 1.0, ), '(bool) true for index' => array( 'permalink_structure' => '/index.php', 'index' => true, ), '(bool) false for index' => array( 'permalink_structure' => '/index.php', 'index' => true, ), // Produces a Fatal Error. // 'an array for permalink structure' => array( // 'permalink_structure' => array( '/index.php' ), // 'index' => 'index.php', // ), // Produces a Fatal Error. // 'an object for permalink structure' => array( // 'permalink_structure' => (object) array( '/index.php' ), // 'index' => 'index.php', // ), '(int) -1 for permalink structure' => array( 'permalink_structure' => -1, 'index' => 'index.php', ), '(int) 0 for permalink structure' => array( 'permalink_structure' => 0, 'index' => 'index.php', ), '(int) 1 for permalink structure' => array( 'permalink_structure' => 1, 'index' => 'index.php', ), '(float) -1.0 for permalink structure' => array( 'permalink_structure' => -1.0, 'index' => 'index.php', ), '(float) 0.0 for permalink structure' => array( 'permalink_structure' => 0.0, 'index' => 'index.php', ), '(float) 1.0 for permalink structure' => array( 'permalink_structure' => 1.0, 'index' => 'index.php', ), '(bool) true for permalink structure' => array( 'permalink_structure' => true, 'index' => 'index.php', ), '(bool) false for permalink structure' => array( 'permalink_structure' => false, 'index' => 'index.php', ), ); foreach ( $datasets as $name => $data ) { $result = preg_match( '#^/*' . $data['index'] . '#', $data['permalink_structure'] ); echo "preg_match() with $name: ", is_int( $result ) ? $result : 'false', "\n"; }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.31, 8.2.0 - 8.2.27, 8.3.0 - 8.3.15, 8.4.1 - 8.4.2
Warning: preg_match(): Unknown modifier '#' in /in/M94EH on line 104 preg_match() with an index containing the delimiter: false preg_match() with empty index: 1 Warning: Array to string conversion in /in/M94EH on line 104 preg_match() with an array for index: 0 preg_match() with (int) -1 for index: 0 preg_match() with (int) 0 for index: 0 preg_match() with (int) 1 for index: 0 preg_match() with (float) -1.0 for index: 0 preg_match() with (float) 0.0 for index: 0 preg_match() with (float) 1.0 for index: 0 preg_match() with (bool) true for index: 0 preg_match() with (bool) false for index: 0 preg_match() with (int) -1 for permalink structure: 0 preg_match() with (int) 0 for permalink structure: 0 preg_match() with (int) 1 for permalink structure: 0 preg_match() with (float) -1.0 for permalink structure: 0 preg_match() with (float) 0.0 for permalink structure: 0 preg_match() with (float) 1.0 for permalink structure: 0 preg_match() with (bool) true for permalink structure: 0 preg_match() with (bool) false for permalink structure: 0
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: preg_match(): Unknown modifier '#' in /in/M94EH on line 104 preg_match() with an index containing the delimiter: false preg_match() with empty index: 1 Notice: Array to string conversion in /in/M94EH on line 104 preg_match() with an array for index: 0 preg_match() with (int) -1 for index: 0 preg_match() with (int) 0 for index: 0 preg_match() with (int) 1 for index: 0 preg_match() with (float) -1.0 for index: 0 preg_match() with (float) 0.0 for index: 0 preg_match() with (float) 1.0 for index: 0 preg_match() with (bool) true for index: 0 preg_match() with (bool) false for index: 0 preg_match() with (int) -1 for permalink structure: 0 preg_match() with (int) 0 for permalink structure: 0 preg_match() with (int) 1 for permalink structure: 0 preg_match() with (float) -1.0 for permalink structure: 0 preg_match() with (float) 0.0 for permalink structure: 0 preg_match() with (float) 1.0 for permalink structure: 0 preg_match() with (bool) true for permalink structure: 0 preg_match() with (bool) false for permalink structure: 0
Output for 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Warning: preg_match(): Unknown modifier '#' in /in/M94EH on line 104 preg_match() with an index containing the delimiter: false preg_match() with empty index: 1 preg_match() with an array for index: 0 preg_match() with (int) -1 for index: 0 preg_match() with (int) 0 for index: 0 preg_match() with (int) 1 for index: 0 preg_match() with (float) -1.0 for index: 0 preg_match() with (float) 0.0 for index: 0 preg_match() with (float) 1.0 for index: 0 preg_match() with (bool) true for index: 0 preg_match() with (bool) false for index: 0 preg_match() with (int) -1 for permalink structure: 0 preg_match() with (int) 0 for permalink structure: 0 preg_match() with (int) 1 for permalink structure: 0 preg_match() with (float) -1.0 for permalink structure: 0 preg_match() with (float) 0.0 for permalink structure: 0 preg_match() with (float) 1.0 for permalink structure: 0 preg_match() with (bool) true for permalink structure: 0 preg_match() with (bool) false for permalink structure: 0
Output for 4.3.0 - 4.3.10
Warning: Unknown modifier '#' in /in/M94EH on line 104 preg_match() with an index containing the delimiter: false preg_match() with empty index: 1 preg_match() with an array for index: 0 preg_match() with (int) -1 for index: 0 preg_match() with (int) 0 for index: 0 preg_match() with (int) 1 for index: 0 preg_match() with (float) -1.0 for index: 0 preg_match() with (float) 0.0 for index: 0 preg_match() with (float) 1.0 for index: 0 preg_match() with (bool) true for index: 0 preg_match() with (bool) false for index: 0 preg_match() with (int) -1 for permalink structure: 0 preg_match() with (int) 0 for permalink structure: 0 preg_match() with (int) 1 for permalink structure: 0 preg_match() with (float) -1.0 for permalink structure: 0 preg_match() with (float) 0.0 for permalink structure: 0 preg_match() with (float) 1.0 for permalink structure: 0 preg_match() with (bool) true for permalink structure: 0 preg_match() with (bool) false for permalink structure: 0
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