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if(isset($_REQUEST['']) && !empty($_REQUEST['']))
{
$_REQUEST[''] = trim($_REQUEST['']);
if(substr_count($_REQUEST[''],"@") != 1 || stristr($_REQUEST['']," ") || stristr($_REQUEST[''],"\\") || stristr($_REQUEST[''],":")){$errors[] = "Email address is invalid";}else{$exploded_ = explode("@",$_REQUEST['']);if(empty($exploded_[0]) || strlen($exploded_[0]) > 64 || empty($exploded_[1])){$errors[] = "Email address is invalid";}else{if(substr_count($exploded_[1],".") == 0){$errors[] = "Email address is invalid";}else{$exploded_domain = explode(".",$exploded_[1]);if(in_array("",$exploded_domain)){$errors[] = "Email address is invalid";}else{foreach($exploded_domain as $value){if(strlen($value) > 63 || !preg_match('/^[a-z0-9-]+$/i',$value)){$errors[] = "Email address is invalid"; break;}}}}}}
}