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Email validation

This function checks email for validity: check for '@', '.' characters and bad characters that you can define yourself.

<?php
#############################################################
# This function checks email for validity5:
# check for '@', '.' characters and bad characters that you
# can define yourself.
# Contact us at: This e-mail address is being protected from spam bots, you need JavaScript enabled to view it
# Welcome to our Web site at http://php.inc.ru
#############################################################
function check_email($email)
{
$emailArray = preg_split('//', $email);
$atSign = false;
$dotSign = false;
$badCharacter = false;
$validEmail = true;
if (in_array ("@", $emailArray))
{
$atSign = true;
}
if (in_array (".", $emailArray))
{
$dotSign = true;
}
$badCharactersArray = array('#', '$', '%', '(', ')', '&', '!'); // Add your own bad
// characters here;
for ($i = 0; $i < sizeof($badCharactersArray); $i++)
{
if (in_array ($badCharactersArray[$i], $emailArray))
{
$badCharacter = true;
}
}
if ((!$atSign) or (!$dotSign) or ($badCharacter))
{
$validEmail = false;
}
}
?>

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