3v4l.org

run code in 300+ PHP versions simultaneously

@ 2014-02-25T10:15:49Z

<?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]|[1-2][0-9]|3[0-1])', $regexp); 
            $regexp = str_replace('yyyy', '(19|20)?[0-9][0-9]', $regexp); 
            $regexp = str_replace($separator, "\\" . $separator, $regexp); 
            if($regexp != $value && preg_match('/'.$regexp.'\z/', $value)){ 

                // 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_date('22.22.2222', 'mm.dd.yyyy')); // returns false 
var_dump(is_date('11/30/2008', 'mm/dd/yyyy')); // returns true 
var_dump(is_date('30-01-2008', 'dd-mm-yyyy')); // returns true 
var_dump(is_date('2008 01 30', 'yyyy mm dd')); // returns true

Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 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: Call to undefined function is_date() in /in/vvXqN:30 Stack trace: #0 {main} thrown in /in/vvXqN on line 30
Process exited with code 255.
Output for 5.0.0 - 5.0.5, 5.1.1 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28: Fatal error: Call to undefined function is_date() in /in/vvXqN on line 30
Process exited with code 255.
Output for 5.1.0: Fatal error: fatal flex scanner internal error--end of buffer missed in /in/vvXqN on line 33
Process exited with code 255.
Output for 4.4.5 - 4.4.9: Fatal error: Call to undefined function: is_date() in /in/vvXqN on line 30
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4: Fatal error: Call to undefined function: is_date() in /in/vvXqN on line 30
Process exited with code 255.
Output for 4.3.0 - 4.3.1: Fatal error: Call to undefined function: is_date() in /in/vvXqN on line 30

preferences:dark modelive preview

269.99 ms | 401 KiB | 345 Q