bueltge

<?php
/*
Plugin Name: HowTo Plugin
Plugin URI: 
Description: This Plugin demonstrates how you can build your own plugin pages using the WordPress provided draggable metaboxes, requires WordPress 2.7 version, supports WordPress 2.8 changed boxing layout engine
Author: Heiko, Frank
Author URI: http://bueltge.de
Version: 0.1

License:

mikejolley

add_filter( 'woocommerce_billing_fields', 'custom_woocommerce_billing_fields' );

function custom_woocommerce_billing_fields( $fields ) {

   // Over-ride a single label
   $fields['billing_first_name']['label'] = 'Your label';
   
   // Over-ride a single required value
   $fields['billing_first_name']['required'] = false;

lancejpollard

Copied from http://code.lancepollard.com/complete-list-of-html-meta-tags/

Basic HTML Meta Tags

<meta name="keywords" content="your, tags"/>
<meta name="description" content="150 words"/>
<meta name="subject" content="your website's subject">
<meta name="copyright"content="company name">
<meta name="language" content="ES">

luetkemj

// This gist is now maintained on github at https://github.com/luetkemj/wp-query-ref

<?php
/**
* WordPress Query Comprehensive Reference
* Compiled by luetkemj - luetkemj.github.io
*
* CODEX: http://codex.wordpress.org/Class_Reference/WP_Query#Parameters
* Source: https://core.trac.wordpress.org/browser/tags/4.9.4/src/wp-includes/query.php
*/

zanematthew

<?php
/**
 *
 * This is used to regsiter a custom post type, custom taxonomy and provide template redirecting.
 *
 * This abstract class defines some base functions for using Custom Post Types. You should not have to
 * edit this abstract, only add additional methods if need be. You must use what is provided for you
 * in the interface.
 *
 */

turtlepod

<?php
/* Prevent loading this file directly and/or if the class is already defined */
if ( ! defined( 'ABSPATH' ) || class_exists( 'MYFX_Settings_Class' ) )
	return;


/**
 * Settings with Meta Boxes 
 * Helper class to easily create settings page for plugin or theme with Meta Box API.
 *

joeldbirch

/*
 * Supposition v0.3a - an optional enhancer for Superfish jQuery menu widget
 *
 * Copyright (c) 2013 Joel Birch - based on work by Jesse Klaasse - credit goes largely to him.
 * Special thanks to Karl Swedberg for valuable input.
 *
 * Dual licensed under the MIT and GPL licenses:
 *   http://www.opensource.org/licenses/mit-license.php
 * 	http://www.gnu.org/licenses/gpl.html
 */

rcotrina94

This code how to replace the traditional radio-buttons, for custom images. You can do the same with checkboxes.

• Demo: http://jsfiddle.net/La8wQ/10/
• A mod: http://jsfiddle.net/La8wQ/22/

hofmannsven

MySQL

Getting started

• http://www.sqlteaching.com/
• https://www.codecademy.com/learn/learn-sql
• https://www.codecademy.com/catalog/language/sql

Related tutorials

• MySQL-CLI
• Analyzing Business Metrics

jchamb

function direct_free_downloads_button($button)
{
    global $product;

    if( $product->is_downloadable() AND $product->get_price() == 0 )
    {
        $files = $product->get_files();
        $files = array_keys($files);

        $download_url = home_url('?download_file='.$product->id.'&key='.$files[0].'&free=1' );