使用Preg_match错误检查电子邮件是否有效？ [重复]

Question

This question already has an answer here:

• How to validate an Email in PHP? 6 answers

Hello I want to check if email is valid like [e-mail] and not like just plain text 'BLbalbalba'.

I have this function:

function VerifyEmail($address) 
{
   $Syntax='#^[w.-]+@[w.-]+.[a-zA-Z]{2,5}$#';
   if(preg_match($Syntaxe,$adrdess))
      return true;
   else
     return false;
}

And checking it like this:

    $email = htmlentities($_POST['email']);
if (!empty($email) && !empty($password) && !empty($message) && VerifyEmail($email) === true) {

Getting these errors:

Notice: Undefined variable: Syntaxe in C:\xampp\htdocsecover\inc\functions.inc.php on line 20

Notice: Undefined variable: adrdess in C:\xampp\htdocsecover\inc\functions.inc.php on line 20

Warning: preg_match() [function.preg-match]: Empty regular expression in C:\xampp\htdocsecover\inc\functions.inc.php on line 20

Notice: Undefined variable: Syntaxe in C:\xampp\htdocsecover\inc\functions.inc.php on line 20

Notice: Undefined variable: adrdess in C:\xampp\htdocsecover\inc\functions.inc.php on line 20

Warning: preg_match() [function.preg-match]: Empty regular expression in C:\xampp\htdocsecover\inc\functions.inc.php on line 20

Why is this happening? What did I do wrong? Is it a stable way of checking if email is valid? Thanks!

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Answer 1

some spelling mistakes here

should be

function VerifyEmail($address) 
{
   $Syntax='#^[w.-]+@[w.-]+.[a-zA-Z]{2,5}$#';
   if(preg_match($Syntax,$address))