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<?php function isString($value) { return is_string($value); } $vBase = [ 'date' => function($value) { return (bool)preg_match('/^\d{2}\.\d{2}\.\d{4}$/', $value); }, 'string' => isString, ]; $dateVal[] = date('d.m.Y'); $dateVal[] = date('Y-m-d'); foreach ($dateVal as $date) { var_dump( [ 'value' => $date, 'isValidFormat' => $vBase['date']($date), ] ); } var_dump($vBase['string'](1));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Undefined constant "isString" in /in/EGf5r:11 Stack trace: #0 {main} thrown in /in/EGf5r on line 11
Process exited with code 255.
Output for 7.2.6 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant isString - assumed 'isString' (this will throw an Error in a future version of PHP) in /in/EGf5r on line 11 array(2) { ["value"]=> string(10) "31.05.2013" ["isValidFormat"]=> bool(true) } array(2) { ["value"]=> string(10) "2013-05-31" ["isValidFormat"]=> bool(false) } bool(false)
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.37, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20
Notice: Use of undefined constant isString - assumed 'isString' in /in/EGf5r on line 11 array(2) { ["value"]=> string(10) "31.05.2013" ["isValidFormat"]=> bool(true) } array(2) { ["value"]=> string(10) "2013-05-31" ["isValidFormat"]=> bool(false) } bool(false)
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/EGf5r on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/EGf5r on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/EGf5r on line 7
Process exited with code 255.
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