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1. swinhoe
   Member
   Posted 8 months ago #

   Hi Folks,
   Im struggling a bit with my first Plugin code and wondered if you clever folks might be able to show me the light.

   Im trying to write a plugin that amends the is_email function in includes/formatting.php to allow email addresses that use apostrophes.

   Fine in principle, but the more i read, the more i think that I cant by-pass that function, and I cant stop it from throwing the error mid-way through when it finds the apostrophe in question.

   Is there a way to preceed the function and skip the exiting function ?

   Im keen to get a handle on whats possible before i continue down this route...

   From what I have read its not really possible ?

   http://wordpress.org/support/topic/how-to-write-a-plugin-that-can-override-core-files?replies=8

   http://wordpress.org/support/topic/apostrophes-or-single-quote-support-in-user-registration-email-address?replies=5#post-2337601

   Thanks.

   b

2. Jackson
   Member
   Posted 8 months ago #

   The function has a filter which tells you where it failed you could use to catch the exit and run your own validation and return true instead of false.

   // LOCAL PART
   	// Test for invalid characters
   	if ( !preg_match( '/^[a-zA-Z0-9!#$%&\'*+\/=?^_{|}~\.-]+$/', $local ) ) {
   		return apply_filters( 'is_email', false, $email, 'local_invalid_chars' );
   	}

   Psuedo-code...
   

   add_filter( 'is_email', 'my_email_validation', 10, 3 );

   function my_email_validation( $return, $email, $context ) {
       if( 'local_invalid_chars' != $context ) {
           return $return;
       } else {
           // Validate $email however you please, return false or true
       }
   }

   If you think this should be part of core, head over to Trac and open a ticket. http://core.trac.wordpress.org/

   Hope that helps.

3. Jackson
   Member
   Posted 8 months ago #

   Also note, that if you do this you will skip the domain validation parts of the is_email function and will need to include that validation in your function.

4. swinhoe
   Member
   Posted 8 months ago #

   Hi Jackson, thanks for the response.

   Im hammering away at the code now.. will post-up what I have and look forward to comments.

   Cheers

5. swinhoe
   Member
   Posted 8 months ago #

   Am I correct i thinking that I will need to run all of the validation that follows the local part in the 'is_email' function ?

6. Jackson
   Member
   Posted 8 months ago #

   That's correct.

   Check this out: https://gist.github.com/972837

   Might do just what you want.

7. swinhoe
   Member
   Posted 8 months ago #

   Hmmm.. Ive tested it, and no-dice.. still errors - sadly.

   But it cant be far away from what I need..

   *keeps going*

8. _kb
   Member
   Posted 4 months ago #

   Ran up against this same problem a while ago, and this was the solution I came up with. Put the following code into your functions.php file. Pulling the email address from the post variable was the only way that would work.
   

   function email_validator($email_address='' ){
           //Validator will fail on apostrophes when is_email is called if we don't check the POST var instead of $email_address
           $user_email_address = ($_POST['email']) ? $_POST['email'] : $email_address;
           if(filter_var(stripslashes($user_email_address), FILTER_VALIDATE_EMAIL)){
               return stripslashes($user_email_address);
           } else {
               return false;
           }
   }
   add_filter('is_email', 'email_validator', 1, 1);
   add_filter( 'sanitize_email', 'email_validator', 1, 1 );

9. swinhoe
   Member
   Posted 1 month ago #

   Works a treat.

   Good stuff..thanks !
   :)

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