Online PHP editor | rfc for v555V

@ 2014-02-25T10:17:06Z

<?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]', $regexp); 
            echo ($regexp);
            $regexp = str_replace($separator, "\\" . $separator, $regexp); 
            echo ($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_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 git.master, git.master_jit, rfc.property-hooks: (0?[1-9]|1[0-2]).(0?[1-9]|[1-2][0-9]|3[0-1]).(19|20)?[0-9][0-9](0?[1-9]|1[0-2])\.(0?[1-9]|[1-2][0-9]|3[0-1])\.(19|20)?[0-9][0-9]bool(false) (0?[1-9]|1[0-2])/(0?[1-9]|[1-2][0-9]|3[0-1])/(19|20)?[0-9][0-9](0?[1-9]|1[0-2])\/(0?[1-9]|[1-2][0-9]|3[0-1])\/(19|20)?[0-9][0-9]bool(false) (0?[1-9]|[1-2][0-9]|3[0-1])-(0?[1-9]|1[0-2])-(19|20)?[0-9][0-9](0?[1\-9]|[1\-2][0\-9]|3[0\-1])\-(0?[1\-9]|1[0\-2])\-(19|20)?[0\-9][0\-9]bool(false) (19|20)?[0-9][0-9] (0?[1-9]|1[0-2]) (0?[1-9]|[1-2][0-9]|3[0-1])(19|20)?[0-9][0-9]\ (0?[1-9]|1[0-2])\ (0?[1-9]|[1-2][0-9]|3[0-1])bool(false)

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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