Thistutorial will teach you how to validate a e-mail id using regular
expression to control email Spam. In this tutorial I used ternary
operator to filter the values coming from the input box and avoid
errors.Complete Coding is here
<?php
$email=(isset($_POST['email']))?trim($_POST['email']):'';
function verify($email){
if(!preg_match('/^[_A-z0-9-]+((.|+)[_A-z0-9-]+)*@[A-z0-9-]+(.[A-z0-9-]+)*(.[A-z]{2,4})$/',$email)){
return false;
} else {
return $email;
}
}
if(isset($_POST['submit'])){
if(verify($email)){
echo $email." is a valid E-mail ID";
} else {
echo $email." is an invalid E-mail ID";
}
}
?>
<form action="" method="post">
<input type="text" name="email" value="<?php echo $email;?>"/><br/>
<input type="submit" name="submit" value="validate" />
</form>
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