reinnovating/hide_admin_bar.php

## hide_admin_bar.php
<?php
/**
 * Plugin Name: "Hide Admin Bar"-Button
 * Plugin URI: http://unserkaiser.com
 * Description: Easier debugging when the error message is hidden behind the admin bar.
 * Version: 0.1
 * Author: Franz Josef Kaiser
 * Author URI: http://unserkaiser.com
 */
// Prevent loading this file directly - Busted!
! defined( 'ABSPATH' ) AND exit;


/**
 * Adds a button to the admin bar to allow collapsing the admin bar
 * Else some error messages that are output in the html <head> can not be read
 *
 * @version 0.3
 *
 * @return void
 */
function oxo_admin_bar_extd()
{
	global $wp_admin_bar;

	if ( ! is_admin_bar_showing() )
		return;

	// YOU HAVE TO ADJUST THIS TO FIT YOUR THEME
	$title = '<div style="cursor: pointer; margin-bottom: 0;">&DoubleLeftArrow;<div></div></div>';

	is_admin() AND $title = '<div id="collapse-button" class="ab-icon" style="cursor: pointer; margin-bottom: 0;"><div></div></div>';

	$wp_admin_bar->add_node( array(
		 'id'		=> 'collapse'
		,'title'	=> $title
		,'parent'	=> false
		,'meta'		=> array(
			 'title'	=> 'collapse'
		 )
	) );

	// Add the scripts
	add_action( 'admin_footer', 'oxo_admin_bar_extd_cb', 9999 );
}
add_action( 'admin_bar_menu', 'oxo_admin_bar_extd' );


/**
 * Callback that builds the needed script for the admin bar button
 *
 * @since 0.3
 *
 * @return void
 */
function oxo_admin_bar_extd_cb()
{
	?>
	<script type="text/javascript">
	jQuery( document ).ready( function($)
	{
		clicked = 0;
		$( '#wp-admin-bar-collapse div' ).click( function()
		{
			if ( 0 == clicked ) {
				clicked = 1;
				$( '#wpadminbar' ).animate( { width: 35  }, 0 );
				$( '#wpadminbar' ).css( 'min-width', 35 );
				$( '#wp-admin-bar-root-default' ).children().not( '#wp-admin-bar-collapse' ).hide();
				$( '#wp-admin-bar-top-secondary' ).hide();
			} else {
				clicked = 0;
				$( '#wpadminbar' ).animate( { width: '100%'  }, 0 );
				$( '#wpadminbar' ).css( 'min-width', 600 );
				$( '#wp-admin-bar-root-default' ).children().not( '#wp-admin-bar-collapse' ).show();
				$( '#wp-admin-bar-top-secondary' ).show();
			}
		} );
	} );
	</script>
	<?php
}
	<?php
	/**
	* Plugin Name: "Hide Admin Bar"-Button
	* Plugin URI: http://unserkaiser.com
	* Description: Easier debugging when the error message is hidden behind the admin bar.
	* Version: 0.1
	* Author: Franz Josef Kaiser
	* Author URI: http://unserkaiser.com
	*/
	// Prevent loading this file directly - Busted!
	! defined( 'ABSPATH' ) AND exit;



	/**
	* Adds a button to the admin bar to allow collapsing the admin bar
	* Else some error messages that are output in the html <head> can not be read
	*
	* @version 0.3
	*
	* @return void
	*/
	function oxo_admin_bar_extd()
	{
	global $wp_admin_bar;

	if ( ! is_admin_bar_showing() )
	return;

	// YOU HAVE TO ADJUST THIS TO FIT YOUR THEME
	$title = '<div style="cursor: pointer; margin-bottom: 0;">&DoubleLeftArrow;<div></div></div>';

	is_admin() AND $title = '<div id="collapse-button" class="ab-icon" style="cursor: pointer; margin-bottom: 0;"><div></div></div>';

	$wp_admin_bar->add_node( array(
	'id' => 'collapse'
	,'title' => $title
	,'parent' => false
	,'meta' => array(
	'title' => 'collapse'
	)
	) );

	// Add the scripts
	add_action( 'admin_footer', 'oxo_admin_bar_extd_cb', 9999 );
	}
	add_action( 'admin_bar_menu', 'oxo_admin_bar_extd' );


	/**
	* Callback that builds the needed script for the admin bar button
	*
	* @since 0.3
	*
	* @return void
	*/
	function oxo_admin_bar_extd_cb()
	{
	?>
	<script type="text/javascript">
	jQuery( document ).ready( function($)
	{
	clicked = 0;
	$( '#wp-admin-bar-collapse div' ).click( function()
	{
	if ( 0 == clicked ) {
	clicked = 1;
	$( '#wpadminbar' ).animate( { width: 35 }, 0 );
	$( '#wpadminbar' ).css( 'min-width', 35 );
	$( '#wp-admin-bar-root-default' ).children().not( '#wp-admin-bar-collapse' ).hide();
	$( '#wp-admin-bar-top-secondary' ).hide();
	} else {
	clicked = 0;
	$( '#wpadminbar' ).animate( { width: '100%' }, 0 );
	$( '#wpadminbar' ).css( 'min-width', 600 );
	$( '#wp-admin-bar-root-default' ).children().not( '#wp-admin-bar-collapse' ).show();
	$( '#wp-admin-bar-top-secondary' ).show();
	}
	} );
	} );
	</script>
	<?php
	}