PHP用连字符替换所有空格

Question

I replace all spaces with hyphens in my script like this: 我在我的脚本中用连字符替换所有空格，如下所示：

$final = str_replace(' ','-',$final); The - is the only thing I replace.

What I'm replacing are Band Name - Song Name So in this case, if I had something like: 我正在取代的是Band Name - Song Name所以在这种情况下，如果我有类似的东西：

Metallica - Hero of the Day

I end up with: 我最终得到：

 Metallica---Hero-of-the-Day

Notice the 3 --- there? 请注意3 ---那里？

Can you suggest an elegant way of ending up with just one - instead of 3. 你能建议一种优雅的方式，只用一个-而不是3个。

I can keep doing str_replace until it's done, but that doesn't see right. 我可以继续做str_replace直到它完成，但那看起来不对。

Answer 1

使用正则表达式使用一个连字符更改多个空格或连字符：

$final = preg_replace('#[ -]+#', '-', $text);