php - Validate email and ban certain domains


I have this code I currently use to validate emails:

return (bool) preg_match('/^([a-z0-9\+\_\-\.]+)@([a-z0-9\+\_\-\.]{2,})(\.[a-z]{2,4})$/i', $arg0);

How can I modify that code so I can ban several domains? I don't want any extra files to add, just to modify this code.

Thank you.




The easiest way would be to have an array with banned providers:

$providers = Array ( '', '' );

and then just loop trough that array and check if provided email contains'@' . $provider.

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