PHP str_replace（）-用空格替代吗？

Question

I came across a need today to use str_replace() to replace all hyphens in a string with spaces. Easy enough:

$string = "Some-test-string";
$string = str_replace('-', ' ', $string);

The thing is, using ' ' (string with empty space) in the "replacement" part of str_replace() just feels so dirty. Also seems brittle... Looks ugly too.

Is there no better option? I tried using a regex pattern in the "replacement" section but that didn't work, it came out literal.

Ideally, something like this would be great if possible:

$string = "Some-test-string";
$string = str_replace('-', '/\s/', $string);

Thanks!

Edited: Replaced all preg_replace() calls with str_replace() per suggestion.

Answer 1

I see no reason to use regular expressions in this case. Why not use a simpler function, eg strtr() ?

$string = "Some-test-string";
$string = strtr($string, '-', ' ');