Why is this regex str_replace not working? [closed]

问题

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Closed 8 years ago.

I am trying to use a regular expression to replace any domain in a string with another domain but it isn't working yet.

I tested the RegEx part on regexpal.com and it seems to be working.

Here is my code:

$itemdesc = str_replace("([a-z0-9\-]+).(com|net|org|co|cm|info|cc)\s\i","Example.com",$itemdesc);

Please Help! Thanks in advance

回答1:

You need delimiters and preg_replace:

$itemdesc = preg_replace("/([a-z0-9\-]+)\.(com|net|org|co|cm|info|cc)/si","Example.com",$itemdesc);

Note the slashes at either end - the modifiers following the last delimiter

Also note, the delimiters can be any character - try to use a character that isn't used in your regular expression, otherwise it'll need to be escaped everywhere.

回答2:

str_replace does not take a regular expression as parameter, you have to use preg_replace

来源：https://stackoverflow.com/questions/11972695/why-is-this-regex-str-replace-not-working