当preg_replace按预期工作时，PHP mb_ereg_replace无法替换 [英] PHP mb_ereg_replace not replacing while preg_replace works as intended

问题描述

我正在尝试将字符串中所有非单词字符替换为空字符串(期望空格)，然后将所有多个空格放在一起作为一个空格.

I am trying to replace in a string all non word characters with empty string expect for spaces and the put together all multiple spaces as one single space.

下面的代码可以做到这一点.

Following code does this.

$cleanedString = preg_replace('/[^\w]/', ' ', $name);  
$cleanedString = preg_replace('/\s+/', ' ', $cleanedString);

但是当我尝试使用mb_ereg_replace时，什么也没发生.

But when I am trying to use mb_ereg_replace nothing happens.

$cleanedString = mb_ereg_replace('/[^\w]/', ' ', $name);  
$cleanedString = mb_ereg_replace('/\s+/', ' ', $cleanedString);

$ cleanedString与上述情况下的$ name相同.我在做什么错了?

$cleanedString is same as of that if $name in the above case. What am I doing wrong?

推荐答案

mb_ereg_replace不使用分隔符.您可能必须也可能不必之前指定编码.

mb_ereg_replace doesn't use separators. You may or may not also have to specify the encoding before.

mb_regex_encoding("UTF-8");
//regex could also be \W
$cleanedString = mb_ereg_replace('[^\w]', ' ', $name);
$cleanedString = mb_ereg_replace('\s+', ' ', $cleanedString);

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