Email validation with Regular Expressions
This is also case-insensitive,
so it will treat all characters as lower case. It is a really easy way
to check the syntax and format of an email address.
<html>
<body>
<?php
if (isset($_POST['posted'])) {
$email = $_POST['email'];
$theresults = ereg("^[^@ ]+@[^@ ]+\.[^@ \.]+$", $email, $trashed); //"\w+@\w+.\w+$"
if ($theresults) {
$isamatch = "Valid";
} else {
$isamatch = "Invalid";
}
echo "Email address validation says $email is " . $isamatch;
}
?>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="POST">
<input type="hidden" name="posted" value="true">
Enter your email address for validation:
<input type="text" name="email" value="name@example.com">
<input type="submit" value="Validate">
</form>
</body>
</html>
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