Release new version 2.0.0

= 2.0.0 - 2019/11/19 =
* This feature release has a lot. PHP is upgraded to Composer PHP Dependency Manager, Compatibility with Jetpack Accelerator, a full security review, and compatibility with with WordPress 5.3.0
* Feature - Plugin fully refactored to Composer for cleaner and faster PHP code
* Feature - Add Jetpack Accelerator (Proton CDN images) compatibility. Props [@ KZeni](https://github.com/KZeni)
* Tweak - Define new option box so that you can turn ON|OFF Jetpack Compatibility
* Tweak - Remove the hard coded PHP error_reporting display errors false from compile sass to css
* Tweak - Test for compatibility with WordPress 5.3.0
* Tweak - Support for backward compatibility for 3rd party plugin use some functions from old class A3_Lazy_Load
* Tweak - Allow the "skip" class to have single or double quotes. Props [@joneslloyd](https://github.com/joneslloyd)
* Dev - Support new filter tag 'a3_lazy_load_placeholder_url' for change value of placeholder_url Props [@joneslloyd](https://github.com/joneslloyd)
* Dev - Support new filter tag 'a3_lazy_load_iframe_placeholder_url' for change value of iframe_placeholder_url
* Dev - Replace file_get_contents with HTTP API wp_remote_get
* Dev - Ensure that all inputs are sanitized and all outputs are escaped

Author: alextuan

a3-lazy-load.php

@@ -2,15 +2,15 @@
 /*
 Plugin Name: a3 Lazy Load
 Description: Speed up your site and enhance frontend user's visual experience in PC's, Tablets and mobile with a3 Lazy Load.
-Version: 1.9.3
+Version: 2.0.0
 Author: a3rev Software
 Author URI: https://a3rev.com/
 Requires at least: 4.0
-Tested up to: 5.2.2
+Tested up to: 5.3.0
 Text Domain: a3-lazy-load
 Domain Path: /languages
 WC requires at least: 2.0.0
-WC tested up to: 3.6.4
+WC tested up to: 3.8.0
 License: GPLv2 or later
 	Copyright © 2011 a3 Revolution Software Development team
 	a3 Revolution Software Development team
@@ -32,9 +32,19 @@
 define('A3_LAZY_LOAD_IMAGES_URL', A3_LAZY_LOAD_URL . '/assets/images');
 
 define( 'A3_LAZY_LOAD_KEY', 'a3_lazy_load' );
-define( 'A3_LAZY_VERSION', '1.9.3' );
+define( 'A3_LAZY_VERSION', '2.0.0' );
 define( 'A3_LAZY_LOAD_G_FONTS', false );
 
+if ( version_compare( PHP_VERSION, '5.6.0', '>=' ) ) {
+	require __DIR__ . '/vendor/autoload.php';
+
+	global $a3_lazy_load_excludes;
+	$a3_lazy_load_excludes = new \A3Rev\LazyLoad\Excludes();
+	
+} else {
+	return;
+}
+
 /**
  * Load Localisation files.
  *
@@ -60,13 +70,12 @@ function a3_lazy_load_plugin_textdomain() {
 
 include( 'admin/admin-pages/admin-settings-page.php' );
 
+// Backwards compatibility for 3rd party plugin use functions from this plugin
+include( 'classes/classes-backwards-compatibility.php' );
+
 include( 'admin/admin-init.php' );
 include( 'admin/less/sass.php' );
 
-include( 'classes/class-a3-lazy-load-excludes.php' );
-include( 'classes/class-a3-lazy-load.php' );
-include( 'classes/class-a3-lazy-load-filter.php' );
-
 include( 'admin/a3-lazy-load-admin.php' );
 
 // Defined this function for check Lazy Load is enabled that 3rd party plugins or theme can use to check
@@ -91,5 +100,3 @@ function a3_lazy_load_video_enable() {
  * Call when the plugin is activated
  */
 register_activation_hook(__FILE__, 'a3_lazy_load_activated');
-
-?>

admin/a3-lazy-load-admin.php

@@ -31,22 +31,45 @@ function a3_lazy_load_init() {
 $a3_lazy_load_admin_init->init();
 
 // Add upgrade notice to Dashboard pages
-add_filter( $a3_lazy_load_admin_init->plugin_name . '_plugin_extension_boxes', array( 'A3_Lazy_Load_Hook_Filter', 'plugin_extension_box' ) );
+add_filter( $a3_lazy_load_admin_init->plugin_name . '_plugin_extension_boxes', array( '\A3Rev\LazyLoad\Hook_Filter', 'plugin_extension_box' ) );
 
 // Add language
 add_action('init', 'a3_lazy_load_init', 105);
 
 // Add custom style to dashboard
-add_action( 'admin_enqueue_scripts', array( 'A3_Lazy_Load_Hook_Filter', 'a3_wp_admin' ) );
+add_action( 'admin_enqueue_scripts', array( '\A3Rev\LazyLoad\Hook_Filter', 'a3_wp_admin' ) );
 
 // Add extra link on left of Deactivate link on Plugin manager page
-add_action( 'plugin_action_links_'.A3_LAZY_LOAD_NAME, array( 'A3_Lazy_Load_Hook_Filter', 'settings_plugin_links' ) );
+add_action( 'plugin_action_links_'.A3_LAZY_LOAD_NAME, array( '\A3Rev\LazyLoad\Hook_Filter', 'settings_plugin_links' ) );
 
 // Add text on right of Visit the plugin on Plugin manager page
-add_filter( 'plugin_row_meta', array( 'A3_Lazy_Load_Hook_Filter', 'plugin_extra_links'), 10, 2 );
+add_filter( 'plugin_row_meta', array( '\A3Rev\LazyLoad\Hook_Filter', 'plugin_extra_links'), 10, 2 );
 
 // Add admin sidebar menu css
-add_action( 'admin_enqueue_scripts', array( 'A3_Lazy_Load_Hook_Filter', 'admin_sidebar_menu_css' ) );
+add_action( 'admin_enqueue_scripts', array( '\A3Rev\LazyLoad\Hook_Filter', 'admin_sidebar_menu_css' ) );
+
+// Init lazy load Instance
+add_action( 'wp', 'a3_lazy_load_instance', 10, 0 );
+function a3_lazy_load_instance() {
+	$allow_instance = true;
+
+	if ( is_feed() ) {
+		$allow_instance = false;
+	}
+
+	if ( function_exists( 'is_amp_endpoint' ) && is_amp_endpoint() ) {
+		$allow_instance = false;
+	}
+
+	// Compatibility with Better AMP plugin
+	if ( function_exists( 'is_better_amp' ) && is_better_amp() ) {
+		$allow_instance = false;
+	}
+
+	if ( $allow_instance ) {
+		\A3Rev\LazyLoad::_instance();
+	}
+}
 
 // Check upgrade functions
 function a3_lazy_load_upgrade_plugin() {
@@ -64,5 +87,3 @@ function a3_lazy_load_upgrade_plugin() {
 
     update_option('a3_lazy_load_version', A3_LAZY_VERSION );
 }
-
-?>

admin/admin-init.php

@@ -187,7 +187,7 @@ public function admin_settings_page( $page_data = array() ) {
 
 	    ?>
         <div class="wrap">
-            <div class="icon32 icon32-a3rev-ui-settings icon32-a3rev<?php echo $current_page; ?>" id="icon32-a3rev<?php echo $current_page; ?>"><br /></div>
+            <div class="icon32 icon32-a3rev-ui-settings icon32-a3rev<?php echo esc_attr( $current_page ); ?>" id="icon32-a3rev<?php echo esc_attr( $current_page ); ?>"><br /></div>
             <?php
 				$tabs = apply_filters( $this->plugin_name . '-' . $current_page . '_settings_tabs_array', array() );
 
@@ -299,7 +299,7 @@ public function admin_settings_tab( $current_page = '', $tab_data = array()  ) {
         <?php
 			foreach ( $subtabs as $subtab ) {
 		?>
-        	<div class="section" id="<?php echo trim( $subtab['name'] ); ?>">
+        	<div class="section" id="<?php echo trim( esc_attr( $subtab['name'] ) ); ?>">
             <?php if ( isset( $subtab['callback_function'] ) && !empty( $subtab['callback_function'] ) ) call_user_func( $subtab['callback_function'] ); ?>
             </div>
         <?php