How to validate an email address in PHP

In this article, different methods to validate an email address in PHP.It uses regular expressions and an inbuilt email validation function in PHP.

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Using: regular function preg_match() validates an e-mail address:

<?php
   function isValidEmail($str) {
         return (!preg_match("/^([a-z0-9\+_\-]+)(\.[a-z0-9\+_\-]+)*@([a-z0-9\-]+\.)+[a-z]{2,6}$/ix", $str)) ? FALSE : TRUE;
   }
   if(!isValidEmail("info@techarise.com")){
      echo("This is not a valid email address");
   }
   else{
      echo("This is a valid email address");
   }
?>

<?php

function isValidEmail($str) {

return (!preg_match("/^([a-z0-9\+_\-]+)(\.[a-z0-9\+_\-]+)*@([a-z0-9\-]+\.)+[a-z]{2,6}$/ix", $str)) ? FALSE : TRUE;

}

if(!isValidEmail("info@techarise.com")){

echo("This is not a valid email address");

}

else{

echo("This is a valid email address");

}

Using: FILTER_VALIDATE_EMAIL filter validates an e-mail address:

	<?php
	   $email = "admin@techarise.com";
	   // Validate e-mail
	   if (filter_var($email, FILTER_VALIDATE_EMAIL)) {
	      echo("$email is a valid email address");
	   }
	   else{
	      echo("$email is not a valid email address");
	   }
	?>

<?php

$email = "admin@techarise.com";

// Validate e-mail

if (filter_var($email, FILTER_VALIDATE_EMAIL)) {

echo("$email is a valid email address");

}

else{

echo("$email is not a valid email address");

}

You can use the filter_var() function, which gives you a lot of handy validation and sanitization options.

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