Online PHP editor | rfc for vvXqN

@ 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 git.master, git.master_jit, rfc.property-hooks: 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.

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