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‎readme.txt‎

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=== Super Light Cache Buster ===
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Contributors: mwalek
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Tags: asset version, cache, stop cache, cachebuster, cache busting
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Requires at least: 4.0
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Tested up to: 5.7.2
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Requires PHP: 5.2
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License: GPLv2 or later
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License URI: http://www.gnu.org/licenses/gpl-2.0.html
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Stable tag: 1.0.0.1
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Stop browser caching by randomizing asset version numbers.
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== Description ==
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Can't see the changes supposedly made by your developer? Temporarily activate this plugin.
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Using less than 10 lines of code, this simple workaround adds random version numbers to CSS & JS assets to prevent browser caching getting in the way of your happiness. You can deactivate it immediately after or keep it active if the site is under development 😀.

‎super-light-cache-buster.php‎

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<?php
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/*
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* @since 1.0.0
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* @package Super_Light_Cache_Buster
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*
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* @wordpress-plugin
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* Plugin Name: Super Light Cache Buster
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* Description: Using less than 10 lines of code, this simple plugin adds random version numbers to CSS & JS assets to vanquish browser caching. Clear your Site and Server-side caches, and this plugin will do the rest.
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* Version: 1.0.1
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* Author: Mwale Kalenga
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* Author URI: https://mwale.me
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* License: GPL-2.0+
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* License URI: http://www.gnu.org/licenses/gpl-2.0.txt
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*/
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class Super_Light_Cache_Buster {
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public function __construct() {
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// Hook into the admin menu
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add_action( 'admin_menu', array( $this, 'create_plugin_settings_page' ) );
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// Add Settings and Fields
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add_action( 'admin_init', array( $this, 'setup_sections' ) );
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add_action( 'admin_init', array( $this, 'setup_fields' ) );
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/*add_filter( 'register', 'sll_register_link' );
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add_action('login_head', 'control_logo_settings');*/
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}
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public function create_plugin_settings_page() {
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// Add the menu item and page
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$page_title = 'Super Light Cache Buster';
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$menu_title = 'Cache Buster';
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$capability = 'manage_options';
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$slug = 'slcb_options';
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$callback = array( $this, 'plugin_settings_page_content' );
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add_submenu_page( 'options-general.php', $page_title, $menu_title, $capability, $slug, $callback );
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}
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public function plugin_settings_page_content() {?>
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<div class="wrap">
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<diV class="main_content">
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<h2>Super Light Cache Buster Settings</h2><?php /*
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if ( isset( $_GET['settings-updated'] ) && $_GET['settings-updated'] ){
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$this->admin_notice();
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}*/ ?>
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<form method="POST" action="options.php">
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<?php
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settings_fields( 'slcb_fields' );
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do_settings_sections( 'slcb_fields' );
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submit_button();
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?>
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</form>
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<diV>
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</div> <?php
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}
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public function admin_notice() { ?>
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<div class="notice notice-success is-dismissible">
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<p>Your settings have been updated!</p>
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</div><?php
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}
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public function setup_sections() {
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add_settings_section( 'section_one', 'Set Cache Buster Status', array( $this, 'section_callback' ), 'slcb_fields' );
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add_settings_section( 'section_two', 'No Cache Header Setting', array( $this, 'section_callback' ), 'slcb_fields' );
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}
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public function section_callback( $arguments ) {
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switch( $arguments['id'] ){
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case 'section_one':
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echo "You can completely disable Cache Buster when you're not using it. Then it will be 100% idle.";
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echo '<hr>';
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break;
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case 'section_two':
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echo 'This will stop caching on the page in general.';
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echo '<hr>';
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break;
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}
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}
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public function setup_fields() {
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$fields = array(
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array(
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'uid' => 'randomizer_setting_one',
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'label' => 'Enable/Disable Cache Buster',
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'section' => 'section_one',
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'type' => 'select',
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'helper' => 'When disabled your cache will work normally.',
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'options' => array(
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'option1' => 'Enable',
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'option2' => 'Disable',
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),
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'default' => array()
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),
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array(
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'uid' => 'cache_header_one',
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'label' => 'Enable/Disable No Cache Headers',
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'section' => 'section_two',
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'type' => 'select',
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'helper' => 'When enabled your pages will instruct browsers not to cache them.',
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'options' => array(
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'option1' => 'Enable',
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'option2' => 'Disable',
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),
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'default' => array()
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)
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);
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foreach( $fields as $field ){
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add_settings_field( $field['uid'], $field['label'], array( $this, 'field_callback' ), 'slcb_fields', $field['section'], $field );
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register_setting( 'slcb_fields', $field['uid'] );
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}
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}
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public function field_callback( $arguments ) {
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$value = get_option( $arguments['uid'] );
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if( ! $value ) {
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$value = $arguments['default'];
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}
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switch( $arguments['type'] ){
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case 'text':
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case 'password':
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case 'number':
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printf( '<input name="%1$s" id="%1$s" type="%2$s" placeholder="%3$s" value="%4$s" />', $arguments['uid'], $arguments['type'], $arguments['placeholder'], $value );
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break;
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case 'textarea':
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printf( '<textarea name="%1$s" id="%1$s" placeholder="%2$s" rows="5" cols="50">%3$s</textarea>', $arguments['uid'], $arguments['placeholder'], $value );
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break;
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case 'select':
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case 'multiselect':
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if( ! empty ( $arguments['options'] ) && is_array( $arguments['options'] ) ){
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$attributes = '';
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$options_markup = '';
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foreach( $arguments['options'] as $key => $label ){
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$options_markup .= sprintf( '<option value="%s" %s>%s</option>', $key, selected( $value[ array_search( $key, $value, true ) ], $key, false ), $label );
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}
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if( $arguments['type'] === 'multiselect' ){
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$attributes = ' multiple="multiple" ';
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}
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printf( '<select name="%1$s[]" id="%1$s" %2$s>%3$s</select>', $arguments['uid'], $attributes, $options_markup );
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}
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break;
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case 'radio':
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case 'checkbox':
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if( ! empty ( $arguments['options'] ) && is_array( $arguments['options'] ) ){
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$options_markup = '';
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$iterator = 0;
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foreach( $arguments['options'] as $key => $label ){
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$iterator++;
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$options_markup .= sprintf( '<label for="%1$s_%6$s"><input id="%1$s_%6$s" name="%1$s[]" type="%2$s" value="%3$s" %4$s /> %5$s</label><br/>', $arguments['uid'], $arguments['type'], $key, checked( $value[ array_search( $key, $value, true ) ], $key, false ), $label, $iterator );
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}
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printf( '<fieldset>%s</fieldset>', $options_markup );
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}
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break;
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}
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if( $helper = $arguments['helper'] ){
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printf( '<span class="helper"> %s</span>', $helper );
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}
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/*if( $supplimental = $arguments['supplimental'] ){
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printf( '<p class="description">%s</p>', $supplimental );
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}*/
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}
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}
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new Super_Light_Cache_Buster();
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//var_dump($randomizer_control);
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// Randomize version numbers
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function slcb_randomize_ver( $src ) {
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$randomizer_control = get_option('randomizer_setting_one');
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if ( 'option1' == $randomizer_control[0] ) {
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$random_number = wp_rand( 1000, 520000000 );
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$src = esc_url( add_query_arg( 'ver', $random_number, $src ) );
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return $src;
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}
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return $src;
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}
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// Add nocache_headers if enable in wp-admin options
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function slcb_status_header() {
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$cache_header_control = get_option('cache_header_one');
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if ( 'option1' == $cache_header_control[0] ) {
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nocache_headers();
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header("Cache-Control: public, s-maxage=120");
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//define('WP_CACHE', false);
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}
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var_dump($cache_header_control[0]);
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}
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/*add_action( 'template_redirect', array( $this, 'donotcachepage' ), 9999 );
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public function donotcachepage() {
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if ( headers_sent() || ! defined( 'DONOTCACHEPAGE' ) ) {
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return;
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}
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header( 'X-Cache-Enabled: False', true );
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header("Cache-Control: max-age=0, must-revalidate");
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}*/
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add_action ( 'wp_head', 'hook_inHeader' );
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function hook_inHeader() {
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// Get the post id using the get_the_ID(); function:
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define('DONOTCACHEPAGE', true);
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}
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// Randomize asset version for styles
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add_filter( 'style_loader_src', 'slcb_randomize_ver', 9999 );
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// Randomize asset version for scripts
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add_filter( 'script_loader_src', 'slcb_randomize_ver', 9999 );
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// NoCache Header
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add_action( 'send_headers', 'slcb_status_header', 9999 );
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/*function wprdcv_param_redirect(){
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if( !is_admin() && !isset($_GET['cache']) ){
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$location = "https://".$_SERVER['SERVER_NAME'].$_SERVER['REQUEST_URI'];
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$location .= utf8_decode('?cache=bypass');
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wp_redirect( $location );
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}
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}
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add_action('template_redirect', 'wprdcv_param_redirect'); */
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function wprdcv_param_redirect(){
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if( !is_admin() && !isset($_GET['cache']) ){
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$location = "https://".$_SERVER['SERVER_NAME'].$_SERVER['REQUEST_URI'];
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$location .= "a=b";
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//$new = rawurlencode($location);
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// Parameters as array of key => value pairs
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//$newlocation = add_query_arg( 'hello', 'there', $location );
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wp_redirect( $location );
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//exit();
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}
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}
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//add_action('template_redirect', 'wprdcv_param_redirect');
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/*add_action('init','wpse46108_register_param');
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function wpse46108_register_param() {
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global $wp;
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$wp->add_query_var('anyParamName');
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}
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$anyParamNameValue = get_query_var('anyParamName');
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var_dump($_SERVER["REQUEST_URI"]);
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var_dump($anyParamNameValue);
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*/
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/*function add_custom_query_var( $vars ){
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$vars[] = "c";
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return $vars;
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}
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add_filter( 'query_vars', 'add_custom_query_var' );*/
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/*add_action('init','add_query_args');
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function add_query_args()
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{
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add_query_arg( 'var1', 'val1' );
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}
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*/
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function custom_rewrite_basic()
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{
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add_rewrite_rule('^about/([0-9]+)/?', 'about?c=$1', 'top');
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}
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//add_action('init', 'custom_rewrite_basic');
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/**
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* Redirect any items without query string
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*
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* @return void
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function wpse375877_redirect_to_referrer() {
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if ( ! isset( $_GET, $_GET['rfd'], $_GET['dfr'] ) ) {
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$location = "https://".$_SERVER['SERVER_NAME'].$_SERVER['REQUEST_URI'];
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wp_safe_redirect(
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add_query_arg( array(
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'rfd' => 'off',
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'dfr' => 'none'
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), $location )
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);
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// wp_safe_redirect( get_permalink().'?page=1'); exit;
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exit();
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}
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}
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add_action( 'template_redirect', 'wpse375877_redirect_to_referrer' ); */
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/* add_filter( 'query_vars', 'addnew_query_vars', 10, 1 );
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function addnew_query_vars($vars)
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{
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$vars[] = 'var1'; // var1 is the name of variable you want to add
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return $vars;
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}
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var_dump($_GET['var1']);*/
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/*function myplugin_query_vars( $qvars ) {
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$qvars[] = 'custom_query_var';
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return $qvars;
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}
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add_filter( 'query_vars', 'myplugin_query_vars' );
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function wpd_append_query_string( $url ) {
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$url = add_query_arg( 'ngg_force_update', 1, $url );
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return $url;
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}
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add_filter( 'page_link', 'wpd_append_query_string', 10, 2 );*/
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// https://wordpress.stackexchange.com/questions/188749/i-am-looking-to-append-url-parameter-to-all-urls
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// https://wordpress.stackexchange.com/questions/250837/understanding-add-rewrite-rule
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// https://wordpress.stackexchange.com/questions/267131/how-to-filter-to-output-of-the-get-permalink-function
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// https://stackoverflow.com/questions/20754505/wordpress-add-rewrite-tag-add-rewrite-rule-and-post-link
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// https://newbedev.com/get-the-full-url-in-php
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// https://stackoverflow.com/questions/4586835/how-to-pass-extra-variables-in-url-with-wordpress
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// https://stackoverflow.com/questions/27432586/wordpress-page-link-filter
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// https://wordpress.stackexchange.com/questions/250837/understanding-add-rewrite-rule
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// https://wordpress.stackexchange.com/questions/257899/add-rewrite-rule-not-working-for-page-var
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// https://wordpress.stackexchange.com/questions/169787/adding-a-query-string-to-only-one-page-url
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// https://stackoverflow.com/questions/22014167/general-wordpress-link-filter
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// https://stackoverflow.com/questions/20754505/wordpress-add-rewrite-tag-add-rewrite-rule-and-post-link
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// https://wordpress.stackexchange.com/questions/375877/how-to-create-a-filter-and-add-query-params-to-all-links

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