3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function is_valid_date($value, $format = 'dd.mm.yyyy'){ if(strlen($value) >= 6 && strlen($format) == 10){ // find separator. Remove all other characters from $format $separator_only = str_replace(array('m','d','y'),'', $format); $separator = $separator_only[0]; // separator is first character if($separator && strlen($separator_only) == 2){ // make regex $regexp = str_replace('mm', '(0?[1-9]|1[0-2])', $format); $regexp = str_replace('dd', '(0[1-9]|[12][0-9]|3[01])', $regexp); $regexp = str_replace('yyyy', '((?:19|20)\d\d)', $regexp); $regexp = str_replace($separator, "\\" . $separator, $regexp); echo ($regexp."<br>\n"); if($regexp != $value && preg_match('/'.$regexp.'\z/', $value)){ echo ("-----------------------------"); // check date $arr=explode($separator,$value); $day=$arr[0]; $month=$arr[1]; $year=$arr[2]; if(@checkdate($month, $day, $year)) return true; } } } return false; } var_dump(is_valid_date('22.22.2222', 'mm.dd.yyyy')); // returns false var_dump(is_valid_date('11/30/2008', 'mm/dd/yyyy')); // returns true var_dump(is_valid_date('30-01-2008', 'dd-mm-yyyy')); // returns true var_dump(is_valid_date('2008 01 30', 'yyyy mm dd')); // returns true
Output for 4.3.0 - 5.0.5, 5.1.1 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
(0?[1-9]|1[0-2])\.(0[1-9]|[12][0-9]|3[01])\.((?:19|20)\d\d)<br> bool(false) (0?[1-9]|1[0-2])\/(0[1-9]|[12][0-9]|3[01])\/((?:19|20)\d\d)<br> -----------------------------bool(false) (0[1\-9]|[12][0\-9]|3[01])\-(0?[1\-9]|1[0\-2])\-((?:19|20)\d\d)<br> -----------------------------bool(true) ((?:19|20)\d\d)\ (0?[1-9]|1[0-2])\ (0[1-9]|[12][0-9]|3[01])<br> -----------------------------bool(false)
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/VH5Mn on line 34
Process exited with code 255.