public static function genRandomStr($l) {
		$p = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
		$s = '';
		for ($i = 0; $i < $l; $i++) {
			$s .= $p[mt_rand(0, (mb_strlen($p) - 1))];
		}
		return $s;
	}
public static function genRandomStr($l) {
		$p = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
		$s = '';
		for ($i = 0; $i < $l; $i++) {
			$s .= $p[mt_rand(0, (mb_strlen($p) - 1))];
		}
		return $s;
	}
public static function genRandomStr ( $ l ) { $ p = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ' ; $ s = '' ; for ( $ i = 0 ; $ i < $ l ; $ i ++ ) { $ s .= $ p [ mt_rand ( 0 , ( mb_strlen ( $ p ) - 1 ) ) ] ; } return $ s ; }
Generate a random string of letters and numbers of a specific length.

@param int $l The desired length of the string.
@return string The generated string.
Generate a random string of letters and numbers of a specific length .