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The easiest way to validate an email address in php and html

 The easiest way to validate an email address in php and html

<?php if (filter_var('email@myemail.it', FILTER_VALIDATE_EMAIL) === false) { echo ' wrong email'; } ?>

via html just use the type "email" for your input and the browser will do the rest if you don't have particular needs. Required will make your input mandatory.
 
<input type="email" name="email" required>

Never use only client side validations/checks.
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