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Asked: 2026-05-24T16:53:04+00:00

I want to remove the domain extension .com from a string using preg_replace() ,

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I want to remove the domain extension .com from a string using preg_replace(), so for example, if the subject parameter is facebook.com, .com will be erased from the string.

I thought this would work, preg_replace(".com", "", $host);

Unfortunately it returned the error:Warning: preg_replace() [function.preg-replace]: No ending delimiter '.' found in.

I then attempted to escape the period with a backslash (thinking this was the problem), which returned:

Warning: preg_replace() [function.preg-replace]: Delimiter must not be alphanumeric or backslash

Any comments, answers or information would be greatly appreciated!! :).

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1 Answer

  1. Editorial Team

    You do have to escape the dot but also regular expressions have to be passed in the form of /pattern/ that is between slashes

    preg_replace("/\.com/", "", $host);

    Side note, there are better recommended ways to do this than using the almighty regular expressions. For example:

    $url = explode(".","http://static.facebook.com");   
echo $url[1]; // facebook
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