Removing the Forgetmenot-checkbox on the WordPress login screen.

readme.txt

README

Install
Donwload the zip-archive, uncompress it into a folder, upload the folder to your WordPress plugin-folder. Activate the plugin on the plugin screen.

!!!ATTENTION!!!
If you are using PHP5.2, delete or rename the file 'index.php' BEFORE upload/activate the plugin. Then rename the file 'index_php52.php' into 'index.php'

functions-php.part.php

<?php

/**
 * Remove forgetmenot-checkbox on login screen
 * Uses the hook 'after_theme_setup' instead of 'plugins_loaded' because
 * first the theme have to be setup for get_template_directory_uri()
 *
 * @uses add_action()
 * @hook after_setup_theme
 */
add_action(
  'after_setup_theme',
	'WPSE77581_remove_forgetmenot',
	10,
	0
);

/**
 * Hook up all actions and filters
 *
 * @uses add_action()
 * @hook login_enqueue_scripts
 * @hook login_head
 * @hook login_footer
 */
function WPSE77581_remove_forgetmenot() {

	// add JavaScript
	add_action( 'login_enqueue_scripts', 'WPSE77581_enqueue_script', 10, 0 );

	// plain PHP with outputbuffering
	add_action( 'login_head', 'WPSE77581_start_outputbuffer', 1, 0 );
	add_action( 'login_footer', 'WPSE77581_end_outputbuffer', 1, 0 );

}

/**
 * Enqueueing needed JavaScripts
 * JS is stored in the folder 'js' inside the theme folder
 *
 * @uses wp_enqueue_script
 * @uses get_template_directory_uri()
 */
function WPSE77581_enqueue_script() {

	wp_enqueue_script(
		'WPSE77581-remove-forgetmenot',
		get_template_directory_uri() . '/js/wpse77581.js',
		array( 'jquery' ),
		false,
		true
	);

}

/**
 * Start outputbuffering
 * Buffers the DOM for later manipulation
 */
function WPSE77581_start_outputbuffer() {

	ob_start();

}

/**
 * End outputbuffering
 * Get the content from outputbuffer and remove the paragraph with checkbox
 */
function WPSE77581_end_outputbuffer() {

	$html = ob_get_clean();

	$search = '#<p class="forgetmenot">.+</p>#Uuis';

	$html = preg_replace( $search, '', $html );

	echo $html;

}

index.php

<?php
/**
 * WordPress-Plugin Remove Forgetmenot
 *
 * PHP version 5.3
 *
 * @category   PHP
 * @package    WordPress
 * @subpackage Remove Forgetmenot
 * @author     Ralf Albert <me@neun12.de>
 * @license    GPLv3 http://www.gnu.org/licenses/gpl-3.0.txt
 * @version    0.1
 * @date	   20112-12-29
 * @link       http://wordpress.com
 */

/**
 * Plugin Name:	Remove Forgetmenot
 * Plugin URI:	http://yoda.neun12.de
 * Description:	Removes the 'forgetmenot' checkbox from the login screen
 * Version: 	0.1
 * Author: 		Ralf Albert
 * Author URI: 	http://yoda.neun12.de
 * Text Domain:
 * Domain Path:
 * Network:
 * License:		GPLv3
 */

/*
 This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/


namespace WPSE77581;

/**
 * Start the plugin when plugins was loaded
 */
add_action(
	'plugins_loaded',
	'WPSE77581\remove_forgetmenot',
	10,
	0
);

/**
 * Initialize the plugin. Hook up all actions and filters
 */
function remove_forgetmenot() {

	// add JavaScript
	add_action( 'login_enqueue_scripts', 'WPSE77581\enqueue_script', 10, 0 );

	// plain PHP with outputbuffering
	add_action( 'login_head', 'WPSE77581\start_outputbuffer', 1, 0 );
	add_action( 'login_footer', 'WPSE77581\end_outputbuffer', 1, 0 );

}

/**
 * Enqueueing needed JavaScripts
 */
function enqueue_script() {

	wp_enqueue_script(
	'WPSE77581-remove-forgetmenot',
	plugins_url( 'wpse77581.js', __FILE__ ),
	array( 'jquery' ),
	false,
	true
	);

}

/**
 * Start outputbuffering
 * Buffers the DOM for later manipulation
 */
function start_outputbuffer() {

	ob_start();

}

/**
 * End outputbuffering
 * Get the content from outputbuffer and remove the paragraph with checkbox
 */
function end_outputbuffer() {

	$html = ob_get_clean();

	$search = '#<p class="forgetmenot">.+</p>#Uuis';

	$html = preg_replace( $search, '', $html );

	echo $html;

}

index_php52.php

<?php
/**
 * WordPress-Plugin Remove Forgetmenot
*
* PHP version 5.2
*
* @category   PHP
* @package    WordPress
* @subpackage Remove Forgetmenot
* @author     Ralf Albert <me@neun12.de>
* @license    GPLv3 http://www.gnu.org/licenses/gpl-3.0.txt
* @version    0.1
* @date	   	  20112-12-29
* @link       http://wordpress.com
*/

/**
* Plugin Name:	Remove Forgetmenot
* Plugin URI:	http://yoda.neun12.de
* Description:	Removes the 'forgetmenot' checkbox from the login screen
* Version: 		0.1
* Author: 		Ralf Albert
* Author URI: 	http://yoda.neun12.de
* Text Domain:
* Domain Path:
* Network:
* License:		GPLv3
*/

/*
 This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/


/**
 * Start the plugin when plugins was loaded
 */
add_action(
	'plugins_loaded',
	'WPSE77581_remove_forgetmenot',
	10,
	0
);

/**
 * Initialize the plugin. Hook up all actions and filters
*/
function WPSE77581_remove_forgetmenot() {

	// add JavaScript
	add_action( 'login_enqueue_scripts', 'WPSE77581_enqueue_script', 10, 0 );

	// plain PHP with outputbuffering
	add_action( 'login_head', 'WPSE77581_start_outputbuffer', 1, 0 );
	add_action( 'login_footer', 'WPSE77581_end_outputbuffer', 1, 0 );

}

/**
 * Enqueueing needed JavaScripts
 */
function WPSE77581_enqueue_script() {

	wp_enqueue_script(
		'WPSE77581-remove-forgetmenot',
		plugins_url( 'wpse77581.js', __FILE__ ),
		array( 'jquery' ),
		false,
		true
	);

}

/**
 * Start outputbuffering
 * Buffers the DOM for later manipulation
 */
function WPSE77581_start_outputbuffer() {

	ob_start();

}

/**
 * End outputbuffering
 * Get the content from outputbuffer and remove the paragraph with checkbox
 */
function WPSE77581_end_outputbuffer() {

	$html = ob_get_clean();

	$search = '#<p class="forgetmenot">.+</p>#Uuis';

	$html = preg_replace( $search, '', $html );

	echo $html;

}

wpse77581.js

/**
 * JavaScript (jQuery)
 * Removes all paragraphs with class '.forgetmenot'
 */
jQuery( document ).ready(
    function ( $ ) {
        $( '.forgetmenot' ).remove();
    }
);