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Advanced Administration Handbook

Source: https://developer.wordpress.org/advanced-administration/

Welcome to the WordPress Advanced Administration Handbook! Here you will find WordPress advanced documentation. Use the “Contents” menu on the left to navigate topics.

Why Advanced Administration?

Not all users who use WordPress have to know about technology, and therefore in its documentation should not appear either, and developers do not have to know certain advanced system configurations.

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// cleverreach api
$cleverreach = (object) [
    'api_url' => 'https://rest.cleverreach.com',
    'client_id' => 'xxxxxxxxxx',
    'client_secret' => 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx',
    'list_id' => 1337,
    'form_id' => 1337,
    'access_token' => null,
    'email' => '[email protected]',
    'source' => 'tld.com',

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<?php 
/*
 * Display posts only from today and in the future:
 * http://old.support.advancedcustomfields.com/discussion/6000/how-to-sort-posts-by-acf-date-and-display-only-future-posts
 * by Pasnon
 */


$date_args = array(
        'post_type'   => 'events',

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<?php 

// Hook 	

add_action('admin_menu', 'add_tutorial_cpt_submenu_example');

//Callback function 

function add_tutorial_cpt_submenu_example(){
	

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// Adds the Payment Request button (Apple Pay) on the checkout page then moves it to after the customer details.
// Replace `woocommerce_checkout_after_customer_details` with wherever you want to 

add_filter( 'wc_stripe_show_payment_request_on_checkout', '__return_true' );

remove_action( 'woocommerce_checkout_before_customer_details', array( WC_Stripe_Payment_Request::instance(), 'display_payment_request_button_html' ), 1 );
remove_action( 'woocommerce_checkout_before_customer_details', array( WC_Stripe_Payment_Request::instance(), 'display_payment_request_button_separator_html' ), 2 );

add_action( 'woocommerce_checkout_after_customer_details', array( WC_Stripe_Payment_Request::instance(), 'display_payment_request_button_html' ), 1 );
add_action( 'woocommerce_checkout_after_customer_details', array( WC_Stripe_Payment_Request::instance(), 'display_payment_request_button_separator_html' ), 2 );

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/** Move Stripe Payment Request Button on product page **/

remove_action( 'woocommerce_after_add_to_cart_quantity', array( WC_Stripe_Payment_Request::instance(), 'display_payment_request_button_html' ), 1 );
remove_action( 'woocommerce_after_add_to_cart_quantity', array( WC_Stripe_Payment_Request::instance(), 'display_payment_request_button_separator_html' ), 2 );

add_action( 'woocommerce_after_add_to_cart_button', array( WC_Stripe_Payment_Request::instance(), 'display_payment_request_button_html' ), 2 );
add_action( 'woocommerce_after_add_to_cart_button', array( WC_Stripe_Payment_Request::instance(), 'display_payment_request_button_separator_html' ), 1 );

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<?php

$args = array(
  'label' => '', // Text in Label
  'class' => '',
  'style' => '',
  'wrapper_class' => '',
  'value' => '', // if empty, retrieved from post meta where id is the meta_key
  'id' => '', // required
  'name' => '', //name will set from id if empty

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/*
 * Add our Custom Fields to simple products
 */
function mytheme_woo_add_custom_fields() {

	global $woocommerce, $post;

	echo '<div class="options_group">';

 	// Text Field

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Oxygen 'Child Theme' Support

This function is for developers, which use Oxygen and still want to override plugin-files when it reads in their documentation such as

1. Create a folder in your theme folder called search-filter.
2. Copy the file wp-content\plugins\search-filter\templates\results.php from the templates folder in to the newly created folder in your theme – wp-content\themes\your-theme-name\search-filter\results.php

Where to put such files, if Oxygen is not a theme and won't uses themes ?

Usage

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<?php
/**
 * Export Data to CSV file
 * Could be used in WordPress plugin or theme
 */

// A sample link to Download CSV, could be placed somewhere in plugin settings page
?>
<a href="<?php echo admin_url( 'admin.php?page=myplugin-settings-page' ) ?>&action=download_csv&_wpnonce=<?php echo wp_create_nonce( 'download_csv' )?>" class="page-title-action"><?php _e('Export to CSV','my-plugin-slug');?></a>