T5 Extend Email Checks

t5-extend-email-checks.php

<?php # -*- coding: utf-8 -*-
/*
Plugin Name: T5 Extend Email Checks
Description: Overrides the results of the functions <code>is_email()</code> and <code>sanitize_email()</code>. Allows for example <code>me@localhost</code> or punycode encoded email adresses by using PHP’s internal filter function.
Version:     2012.08.29
Plugin URI:  http://toscho.de/?p=2195
Author:      Thomas Scholz
Author URI:  http://toscho.de
License:     MIT
*/
! defined( 'ABSPATH' ) and exit;

if ( ! function_exists( 't5_extend_email_checks' ) )
{
	add_filter( 'is_email',       'extend_email_checks', 10, 2 );
	add_filter( 'sanitize_email', 'extend_email_checks', 10, 2 );

	function t5_extend_email_checks( $result, $email )
	{
		return filter_var( $email, FILTER_VALIDATE_EMAIL );
	}
}

no, no parse error, but the address is still rejected.

does the PHP filter not allow apostrophes ?

The filter allows apostrophes, at least the fake apostrophe '. Hm, the WordPress functions should allow it too. I’m not sure what happens here.

They, dont, its a logged issue in WP Trac. Im trying to find the easiest workaround...

Are we going to get this change pushed into a future release ?

https://wordpress.org/support/topic/writing-a-plugin-to-amend-the-core-possible?replies=9#post-2769861

It would be handy to support email address's properly...

There is an open ticket: http://core.trac.wordpress.org/ticket/17433

Go, vote for it, add Unit tests. Then it may become part of the core.

That's not quite the same issue, but i appreciate it needs to be voted up.. Can we add the apostrophe issue to the same core change maybe ? Thanks Ben

…

On Mon, Apr 23, 2012 at 11:32 AM, Thomas Scholz < ***@***.*** > wrote: There is an open ticket: http://core.trac.wordpress.org/ticket/17433 Go, vote for it, add Unit tests. Then it may become part of the core. --- Reply to this email directly or view it on GitHub: https://gist.github.com/972837

Ask on Trac. I have no influence to core development.

The callback functions need the t5_ prefix - have forked a working example.

Note that apostrophes are escaped by WordPress, so they are still invalid.