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@ 2014-03-10T23:30:38Z

<?php
function validateDateA($date, $format = 'Y-m-d')
{
    $dt = DateTime::createFromFormat($format, $date);
    return $dt && $dt->format($format) == $date;
}

function validateDateB($date, $format = 'Y-m-d')
{
    DateTime::createFromFormat($format, $date);
	$a = DateTime::getLastErrors();
	return !$a['warning_count'] && !$a['error_count'];
}

var_dump(validateDateA('Tue, 27 Feb 2012 12:12:12 +0200', DateTime::RSS)); # false
var_dump(validateDateA('Mon, 29 Feb 2012 12:12:12 +0200', DateTime::RSS)); # true
var_dump(validateDateB('Tue, 27 Feb 2012 12:12:12 +0200', DateTime::RSS)); # true
var_dump(validateDateB('Fri, 27 Feb 2012 12:12:12 +0200', DateTime::RSS)); # true
var_dump(validateDateB('Xxx, 27 Feb 2012 12:12:12 +0200', DateTime::RSS)); # false
var_dump(validateDateB('Aaa, 27 Feb 2012 12:12:12 +0200', DateTime::RSS)); # false

Output for git.master, git.master_jit: bool(false) bool(false) Warning: Trying to access array offset on value of type bool in /in/soYQa on line 12 Warning: Trying to access array offset on value of type bool in /in/soYQa on line 12 bool(true) Warning: Trying to access array offset on value of type bool in /in/soYQa on line 12 Warning: Trying to access array offset on value of type bool in /in/soYQa on line 12 bool(true) bool(false) bool(false)
Output for rfc.property-hooks: bool(false) bool(false) Warning: Trying to access array offset on false in /in/soYQa on line 12 Warning: Trying to access array offset on false in /in/soYQa on line 12 bool(true) Warning: Trying to access array offset on false in /in/soYQa on line 12 Warning: Trying to access array offset on false in /in/soYQa on line 12 bool(true) bool(false) 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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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