tahirtaous

// Original Source : http://www.elftronix.com/add-css-class-directly-to-wordpress-menu-item-link/

// This is modified version of code from elftronix.com
// -1 will add custom CSS class to every menu item, while if you will use 1 ut will add Custom css classs to 1st link only.
// normally WordPress themes apply CSS classes to UL and li not a links, that's why you can use this code to add class to anchors.
// i used this code to apply .mdl-navigation__link class from Material Design Framework to anchors, when i was creating WordPress theme with material design.


//Step 1 :  Add this to register functions.php navigation menu

tahirtaous

#addthese two lines in the root folder of your old domain inside .htaccess file
RewriteEngine on
RewriteRule (.*) http://newdomain.com/$1 [R=301,L]

tahirtaous

// hide screen options and Help Buttons from WordPress Dashboard
// tested WP 4.1 Jan 25 2015
// https://wordpress.org/support/topic/remove-items-from-screen-options
// paste this code to functions.php file

add_action( 'admin_head', 'remove_wordpress_cfields' );
function remove_wordpress_cfields() {
echo '<style>#screen-meta-links { display: none; }</style>';
}

tahirtaous

// This code will show message only on mobile devices
// only mobile users will see this message
// Source: https://www.cms2cms.com/blog/6-useful-yet-relatively-unknown-wordpress-functions/
// Tested: WordPress 4.1 Jan 25 2015
<?php if( wp_is_mobile() ) : ?>
Visit our website on your desktop for a richer user experience
<?php endif ?>

tahirtaous

// Source: https://www.cms2cms.com/blog/6-useful-yet-relatively-unknown-wordpress-functions/
// This function will generate something like this
// This post was published 2 weeks ago
// Tested : WordPress 4.1
<?php 
echo 'This post was published ' . human_time_diff( get_the_time( 'U' ), current_time( 'timestamp' ) ) . ' ago';
?>

tahirtaous

// Reference : https://www.cms2cms.com/blog/6-useful-yet-relatively-unknown-wordpress-functions/
// add this code to sidebar.php or anywhere you want to display email addess
// remove <?php and ?> if you are going to paste this in functions.php
// Tested WordPress 4.1 Jan 25 2015

<?php 

$email = '[email protected]';
echo 'You can contact me at ' . antispambot( $email ) . ' any time';

tahirtaous

// Source http://wordpress.stackexchange.com/posts/28530/revisions
// Tested and worked on WordPress 4.1 Beta
//REMOVE VERSION STRING FROM HEADER
remove_action('wp_head', 'wp_generator');

//HIDE LOGIN ERROR MESSAGES (Wrong Password, No Such User etc.)
add_filter('login_errors',create_function('$a', "return null;"));

// Remove admin name in comments class
// Source: http://www.wprecipes.com/wordpress-hack-remove-admin-name-in-comments-class

tahirtaous

// Wordpress Custom Admin Footer
// customize admin footer text. Add this to functions.php
// Source http://wordpress.stackexchange.com/posts/6005/revisions
// Modified by Tahir Taous


// customize admin footer text Will be visible in Dashboard
function custom_admin_footer() {
        echo 'Created By <a href="//tahirtaous.com/contact">Tahir Taous</a> ';
} 

tahirtaous

// Source : http://wordpress.stackexchange.com/questions/1567/best-collection-of-code-for-your-functions-php-file
// unregister all default WP Widgets
function unregister_default_wp_widgets() {
    unregister_widget('WP_Widget_Pages');
    unregister_widget('WP_Widget_Calendar');
    unregister_widget('WP_Widget_Archives');
    unregister_widget('WP_Widget_Links');
    unregister_widget('WP_Widget_Meta');
    unregister_widget('WP_Widget_Search');
    unregister_widget('WP_Widget_Text');

tahirtaous

// Open you functions.php file and paste the following code:
// Save the file and open your blog homepage to run the code. Once done, there’s no need to keep the code snippet in your
// functions.php file, as it will always delete all post revisions. So simply remove it.
// http://www.wprecipes.com/easily-delete-wordpress-post-revisions-using-your-fuctions-php-file


$wpdb->query( "
DELETE FROM $wpdb->posts
WHERE post_type = 'revision'
" );