petersplugins

<div class="container">

  <div id="primary">

    <div id="content">

      <?php 

        $pp404 = false;

petersplugins

<?php
// This code snippet forces login with email address and eliminates login with user name

// Remove the default authentication function and replace it by a custom function
remove_filter( 'authenticate', 'wp_authenticate_username_password', 20, 3 );
add_filter( 'authenticate', 'force_email_login', 20, 3 );

// Custom function to force email login
function force_email_login( $user, $username, $password ) {

petersplugins

<?php
// This code snippet removes the wrong password login screen shake

// Add a custom function to the login head
add_action( 'login_head', 'remove_login_shake' );

function remove_login_shake() {
  // remove the wp_shake JavaScript
  remove_action( 'login_head', 'wp_shake_js', 12 );
}

petersplugins

<?php
// This code snippet automatically deletes the thumbnail if a post is deleted

// Add a custom function that runs before a post is deleted
add_action( 'before_delete_post', 'remove_post_thumbnail', 10 );

// This function deletes the image assigned as thumbnail from the media library
function remove_post_thumbnail( $post_id ) {
  
  // First we have to check, of there's a thumbnail assigned to the post

petersplugins

<?php
// This code snippet forces a new created user to change his password on first login

// To identify if a user changed his password we'll add an user meta key named password-changed when a user changes his password

// A new created user does not have this meta - so we know, he has to changed his password yet
// To force an user again to change his password we'd only have to delete the meta key

// Add a custom function to current_screen which is an admin hook triggered after the necessary elements to identify a screen are set up
add_action( 'current_screen', 'check_password_changed' );

petersplugins

<?php
// This code snippet adds a meta box in the right sidebar of the post screen that lists all available shortcodes

// As we use a default WordPress admin meta box the box can be closed to save space and opened when needed

// Add a custom function to create the meta box
add_action( 'add_meta_boxes', 'add_shortcodes_metabox' );

// This function adds the meta box
function add_shortcodes_metabox() {

petersplugins

<?php
// This code snippet replaces the link to the locally hosted jQuery core with the link to the jQuery core hosted on jQuery CDN

// This reduces server load and page load time

// We do not use wp_deregister_script and wp_register_script but we directly access the global variable $wp_scripts
// because we want to replace the script with the correct version number

add_action( 'wp_print_scripts', 'replace_jquery' );

petersplugins

<?php
// This code snippet allows you to use shortcodes inside text widgets

// Some themes enable this feature, so maybe there's no need to do this yourself
// If your theme does not, this tiny code can do it

add_filter( 'widget_text', 'do_shortcode' );

?>

petersplugins

<?php
// This code snippet completely removes the admin bar from the front end

add_filter( 'show_admin_bar', '__return_false' );

?>

petersplugins

<?php
// This code snippet hides exclusive content if the user is not logged in

// To hide content you have to create a category with the slug 'only-for-members'
// All posts assigned to this category will be hidden from not logged in users

// Add a custom function to filter the content
add_filter( 'the_content', 'exclusive_content', 99 );

// If the user is not logged in, the excerpt will be displayed plus a message that the content is avialable only for registered users