Email Validation

Hello Programmers
Please help me on creating Javascript program on email validation using loops.

Thankyou

 

It is better to use regex: http://marketingtechblog.com/2007/10/28/javascript-regex-emailaddress/

 

you could also just use this:

$email = mysql_real_escape_string($_POST['email'])
if(!$email == "" && (!strstr($email,"@") || !strstr($email,".")))
{
echo '<h1>Invalid email address!</h1>';
die ("Go back! ");
}

 

^you could do that, but it'd be a pretty lazy validation. I think regular expressions is the way to go:
http://www.regular-expressions.info/javascriptexample.html

 

This is the email validation function wordpress uses for comments:

/**
 * Checks to see if the text is a valid email address.
 *
 * @since 0.71
 *
 * @param string $user_email The email address to be checked.
 * @return bool Returns true if valid, otherwise false.
 */
function is_email($user_email) {
	$chars = "/^([a-z0-9+_]|\\-|\\.)+@(([a-z0-9_]|\\-)+\\.)+[a-z]{2,6}\$/i";
	if (strpos($user_email, '@') !== false && strpos($user_email, '.') !== false) {
		if (preg_match($chars, $user_email)) {
			return true;
		} else {
			return false;
		}
	} else {
		return false;
	}
}

PHP:

 

here's another

	function valid_email($email){
		return ((preg_match("/[a-zA-Z0-9]+([._][a-zA-Z0-9]+)*@[^ ]+\.[a-zA-Z0-9]/", preg_quote($email))) ? true : false);
	}

Code (markup):

 

You can try this code: