我修饰符不适用于外语？

Question

我的字符串是外语.我使用以下正则表达式:

$str = '?? ???? ??? ??? ?????';
$word = '???';

$cont = preg_match_all("/.{0,80}[^\s]*?".preg_quote($word)."[^\s]*?.{0,80}/si",$str,$matched);
print_r($matched);//returns Array ( [0] => Array ( ) ) ..

.

......但如果我设定:

$word = "???";//returns Array ( [0] => Array ( [0] => ?? ???? ??? ??? ????? ) )  

我能做些什么才能在外语中使用I修饰符？

Answer 1

尝试添加u修饰符:

$cont = preg_match_all("/.{0,80}[^\s]*?".preg_quote($word)."[^\s]*?.{0,80}/siu",$str,$matched);