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phpregexvalidationemail-validation

PHP error using the preg_match function

I'm was using PHP eregi function, but I get the notice that it is deprecated. Here's my code:

!eregi("^[A-Z0-9._%-]+@[A-Z0-9._%-]+\.[A-Z]{2,4}$", trim($_POST['email']))

Therefore I am trying to replace the function with the preg_match, but seems that I am unable to get the correct pattern for the preg_match, as I get error with the following code:

!preg_match("^[A-Z0-9._%-]+@[A-Z0-9._%-]+\.[A-Z]{2,4}$", trim($_POST['email']))

Here's the error I get from above code:

Warning: preg_match(): No ending delimiter '^' found in

Thanks for any help.

Solution

  • You need to use a delimiter at the beginning and end of your regex, commonly /:

    !preg_match("/^[A-Z0-9._%-]+@[A-Z0-9._%-]+\.[A-Z]{2,4}$/", trim($_POST['email']))

    Manual entry: PCRE introduction / delimiters