khoand0000 · September 11, 2014 15:41
diff --git a/validate_email.php b/validate_email.php
 <?php 

 $regex = "/([a-z0-9_]+|[a-z0-9_]+\.[a-z0-9_]+)@(([a-z0-9]|[a-z0-9]+\.[a-z0-9]+)+\.([a-z]{2,4}))/i"; 

 // usage 

 if(!preg_match($regex, $email)) { 
    echo "Invalid email address"; 
 } 
 else { 
    echo "email is valid"; 
 }
	<?php

	$regex = "/([a-z0-9_]+\|[a-z0-9_]+\.[a-z0-9_]+)@(([a-z0-9]\|[a-z0-9]+\.[a-z0-9]+)+\.([a-z]{2,4}))/i";

	// usage

	if(!preg_match($regex, $email)) {
	echo "Invalid email address";
	}
	else {
	echo "email is valid";
	}