<?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)\d\d)', $regexp);
echo ($regexp."<br>\n");
$regexp = str_replace($separator, "\\" . $separator, $regexp);
echo ($regexp."<br>\n");
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 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 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, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
- (0?[1-9]|1[0-2]).(0?[1-9]|[1-2][0-9]|3[0-1]).((?:19|20)\d\d)<br>
(0?[1-9]|1[0-2])\.(0?[1-9]|[1-2][0-9]|3[0-1])\.((?:19|20)\d\d)<br>
bool(false)
(0?[1-9]|1[0-2])/(0?[1-9]|[1-2][0-9]|3[0-1])/((?:19|20)\d\d)<br>
(0?[1-9]|1[0-2])\/(0?[1-9]|[1-2][0-9]|3[0-1])\/((?:19|20)\d\d)<br>
bool(false)
(0?[1-9]|[1-2][0-9]|3[0-1])-(0?[1-9]|1[0-2])-((?:19|20)\d\d)<br>
(0?[1\-9]|[1\-2][0\-9]|3[0\-1])\-(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]|[1-2][0-9]|3[0-1])<br>
((?:19|20)\d\d)\ (0?[1-9]|1[0-2])\ (0?[1-9]|[1-2][0-9]|3[0-1])<br>
bool(false)
- Output for 5.1.0
- Fatal error: fatal flex scanner internal error--end of buffer missed in /in/FurFm on line 35
Process exited with code 255.
preferences:
226.77 ms | 401 KiB | 310 Q