sabrina-zeidan

class MyTracker {

  static $hooks;

  static function track_hooks( ) {
    $filter = current_filter();
    if ( ! empty($GLOBALS['wp_filter'][$filter]) ) {
      foreach ( $GLOBALS['wp_filter'][$filter] as $priority => $tag_hooks ) {
        foreach ( $tag_hooks as $hook ) {
          if ( is_array($hook['function']) )  {

sabrina-zeidan

function sz_defer_all_css_but( $tag, $handle ) {
	if (is_admin()) { return $tag; }
	$handlestoexclude = [];
    if ( !in_array($handle, $handlestoexclude ) ){  
		$dom = new \DOMDocument();
        $dom->loadHTML($tag);
        $csstag = $dom->getElementById($handle . '-css');
        $csstag->setAttribute('media', 'print');
        $csstag->setAttribute('onload', "this.media='all'");
        $csstag->removeAttribute('type');

sabrina-zeidan

//if not using rocket_lazyload_excluded_attributes filter, class remove-lazy should be added to WP Rocket settings in admin!
// + there is a helper plugin to do so in case we HAVE unique attribute to refer to https://github.com/wp-media/wp-rocket-helpers/blob/master/lazyload/wp-rocket-exclude-x-first-images-by-attribute/p

add_filter ('the_content', 'sz_add_class_to_first_img');
function sz_add_class_to_first_img($content){
	if (!is_admin() && !is_user_logged_in()){ //do only on frontend for not logged-in 
	if ( is_singular('post') ) { //do on single posts only
			$content = mb_convert_encoding($content, 'HTML-ENTITIES', "UTF-8"); 
			$document = new DOMDocument();
			libxml_use_internal_errors(true);

sabrina-zeidan

// Intercom plugin adds Intercom script to critical render path, sets it to be not defered
// And adds the script in WordPress in a way it doesn't leave much options to alter it in order to delay Intercom execution and prevent it to be render blocking
// Altering buffer in WP generally in not a great idea, but since we have no choice, let's make sure we are altering it in a way it doesn't break things
// If you use WP Rocket -- use 'rocket_buffer' filter instead

add_action( 'init', 'sz_buffer_process_post' ); //we use 'init' action to use ob_start()
function sz_buffer_process_post() {
    ob_start();
}

sabrina-zeidan

//For example we need to modify all <img> tags in the templates that use ACF img fields. 
//To locate them in the theme we need to know their names.
//This snippet will list the names of all ACF fields of image type used on the site, so that we'll be able to search for them in the theme files

			$field_groups = acf_get_field_groups();
			$all_fields = array();
			foreach ($field_groups as $field_group){
				$fields = acf_get_fields($field_group['key']);
				$all_fields = array_merge($all_fields, $fields);
			}		

sabrina-zeidan

class Alter_WP_Scripts extends WP_Scripts{
    //also $deps method!
    function do_item( $handle, $group = false ){       
    	if( 'handle_here' == $handle ){
    		$handle = false;
    	}
        return parent::do_item( $handle, $group );    	
    }
}
if( !is_admin() ){

sabrina-zeidan

//add_action( 'wp_print_scripts', 'sz_enqueue_scripts', 10); //run later or via wp_print_scripts ot catch all scripts
	add_action( 'wp_enqueue_scripts', 'sz_enqueue_scripts', 999); 
	function sz_enqueue_scripts(){
		global $wp_scripts;
		//change dependency to load earlier
		$handles_to_filter = array('dt-above-fold');
		$dependency_handle_to_add = 'wpb_composer_front_js';  //TODO: accept array
		foreach ($handles_to_filter as $handle_to_filter){
			foreach( $wp_scripts->registered as $script_object) { //find script in registered by handle
				if ($script_object->handle == $handle_to_filter){ 

sabrina-zeidan

<?php
/**
 * Plugin Name: SZ WP REST API Tutorial
 * Description: It's an example of WP REST API usage for search with autocomplete with vanilla JS
 * Plugin URI:  
 * Author:      Sabrina Zeidan
 * Author URI:  https://sabrinazeidan.com
 * License:     GNU General Public License v2 or later
 * License URI: http://www.gnu.org/licenses/gpl-2.0.html
 *

sabrina-zeidan

//This filters display, but CSS and JS are still loaded
add_filter( 'addtoany_script_disabled', 'addtoany_disable_display' );
function addtoany_disable_display($script_disabled) {
    if ( is_front_page() || is_archive() ) {		
        return true;
    } else {
	    return $script_disabled;
    }
}

sabrina-zeidan

//If both changed at the same time - custom field value will be applied as it fires later, set 30 to change it add_action( 'profile_update', array($this, 'update_acf_fields'), 30, 2 );
class Sync_ACF_with_User_Profile_Class {
	static public $sync_pair = array(
									array(	'acf' => 'member_name', 'profile_field' => 'first_name'), //add acf field name according to your setup
									array(	'acf' => 'member_lastname', 'profile_field' => 'last_name')// add more rows to sync any other fields as well
									);
    public function __construct() {
		 add_action( 'profile_update', array($this, 'update_acf_fields'), 10, 2 ); //when profile is updated -> update ACF
		 add_action('updated_user_meta',  array($this, 'update_user_profile_fields'),10,4); // when ACF is updated -> update profile
		 add_action('added_user_meta', array($this, 'update_user_profile_fields'),10,4); // when ACF is added -> update profile