function cmp($a,$b){
            return strtotime($a['PROPERTY_DATER_VALUE'])<strtotime($b['PROPERTY_DATER_VALUE']);
        }
usort($item_happ,"cmp");

Character	Meaning	Example
.	Matches any single character	– c.t will match cat, cot, cut, etc.
+	Repeats the previous match one or more times – a+ matches a, aa, aaa, etc
*	Repeats the previous match zero or more times. – a* matches all the same things a+ matches, but will also match an empty string.
?	Makes the match optional.	colou?r will match color and colour.
^	Called an anchor, matches the beginning of the string	^a matches a string that begins with a
$	The other anchor, this matches the end of the string.	a$ matches a string that ends with a.
( )	Groups several characters into a single unit, and captures a match for use in a backreference.	(ab)+ matches ababab - that is, the + applies to the group. For more on backreferences see below.
[ ]	A character class - matches one of the characters	c[uoa]t matches cut, cot or cat.
[^ ]	Negative character class - matches any character not specified	c[^/]t matches cat or c=t but not c/t

setlocale( LC_ALL, "ru_RU.UTF-8" ); strftime("%A %e %B %Y", mktime(0, 0, 0, 1, 1, 2016));

$text = iconv(mb_detect_encoding($det, mb_detect_order(), true), "UTF-8", $det);

function rus2translit($string) {
$converter = array(
		'а' => 'a',   'б' => 'b',   'в' => 'v',
		'г' => 'g',   'д' => 'd',   'е' => 'e',
		'ё' => 'e',   'ж' => 'zh',  'з' => 'z',
		'и' => 'i',   'й' => 'y',   'к' => 'k',
		'л' => 'l',   'м' => 'm',   'н' => 'n',
		'о' => 'o',   'п' => 'p',   'р' => 'r',
		'с' => 's',   'т' => 't',   'у' => 'u',
		'ф' => 'f',   'х' => 'h',   'ц' => 'c',
		'ч' => 'ch',  'ш' => 'sh',  'щ' => 'sch',
		'ь' => 'j',   'ы' => 'y',   'ъ' => 'j',
		'э' => 'e',   'ю' => 'yu',  'я' => 'ya',

		'А' => 'A',   'Б' => 'B',   'В' => 'V',
		'Г' => 'G',   'Д' => 'D',   'Е' => 'E',
		'Ё' => 'E',   'Ж' => 'Zh',  'З' => 'Z',
		'И' => 'I',   'Й' => 'Y',   'К' => 'K',
		'Л' => 'L',   'М' => 'M',   'Н' => 'N',
		'О' => 'O',   'П' => 'P',   'Р' => 'R',
		'С' => 'S',   'Т' => 'T',   'У' => 'U',
		'Ф' => 'F',   'Х' => 'H',   'Ц' => 'C',
		'Ч' => 'Ch',  'Ш' => 'Sh',  'Щ' => 'Sch',
		'Ь' => 'j',   'Ы' => 'Y',   'Ъ' => 'j',
		'Э' => 'E',   'Ю' => 'Yu',  'Я' => 'Ya',
		' ' => '_',   '№' => 'No'
	);
        return strtr($string, $converter);
}
function str2url($str) {
$str = rus2translit($str);
$str = strtolower($str);
$str = preg_replace('~[^-a-z0-9_]+~u', '-', $str);
$str = trim($str, "-");
return $str;
}