想描红所有123但是返回的结果却是008,而不是预想的0560708,是哪里出的有关问题呢

$subject=1235612371238;

$word=123;

$pattern="#.*($word).*#sUi";

echo preg_replace($pattern, "0", $subject);

?>

$subject=1235612371238;

$word=123;

$pattern="/.*($word).*/sUi";

//echo preg_replace($pattern, "0", $subject);

var_dump(Strtr($subject,Array('123'=>'0')));