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Asked: 2026-06-05T07:34:13+00:00

I am trying to replace anything in the string that is not a letter,

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I am trying to replace anything in the string that is not a letter, number, or dash “-“.

How do I modify this line to include the dash?

$link = preg_replace('/[^a-z0-9]/', "", strtolower($_POST['link_name']));

Do I just insert it in there?

$link = preg_replace('/[^a-z0-9-]/', "", strtolower($_POST['link_name']));
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1 Answer

  1. Editorial Team

    You have to escape - since it’s a special character for regexes:

    $link = preg_replace('/[^a-z0-9\-]/', '', strtolower($_POST['link_name']));
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