php正規問題

Question

$dsnStr='mysql://root:root@127.0.0.1:3306/test';
preg_match('/^(.?)://(.?):(.?)@(. ?):([0-9]{1, 6})/(.*?)$/',trim($dsnStr),$matches);
想請教一下這個為啥匹配不出來,$natches是空數組，該怎麼改才能配對出來

Answer 1

雷雷

Answer 2