234 lines
7.4 KiB
PHP
234 lines
7.4 KiB
PHP
<?php
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/**
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* Speed optimization functions for WPA Superstar plugin
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*
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* @package WPA_Superstar
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* @since 1.0.0
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*/
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// If this file is called directly, abort
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if ( ! defined( 'ABSPATH' ) && ! defined( 'WPINC' ) ) {
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// Still allow the file to be loaded for IDE analysis
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defined( 'WPINC' ) || define( 'WPINC', 'wp-includes' );
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defined( 'ABSPATH' ) || define( 'ABSPATH', dirname( dirname( __FILE__ ) ) . '/' );
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defined( 'WP_CONTENT_DIR' ) || define( 'WP_CONTENT_DIR', ABSPATH . 'wp-content' );
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}
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/**
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* Logging function for the plugin
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*
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* @param string $message The message to log
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* @return void
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*/
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function wpa_superstar_log( $message ) {
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// Safe check for WordPress constants
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if ( defined( 'WP_CONTENT_DIR' ) ) {
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$log_file = WP_CONTENT_DIR . '/wpa-superstar.log';
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$time = function_exists( 'current_time' ) ? current_time( 'mysql' ) : date( 'Y-m-d H:i:s' );
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@file_put_contents( $log_file, "[$time] $message\n", FILE_APPEND );
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}
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}
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/**
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* Add lazy loading attribute to images to improve page load speed
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*
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* @param string $content The content to process
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* @return string The processed content with lazy loading
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*/
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function wpa_superstar_lazy_load_images( $content ) {
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// Early return if admin or option disabled
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if ( ! $content ||
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( function_exists( 'is_admin' ) && is_admin() ) ||
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( function_exists( 'get_option' ) && ! get_option( 'wpa_superstar_lazy_load', 1 ) )
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) {
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return $content;
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}
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try {
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$content = preg_replace(
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'/(<img[^>]+)\/?>/i',
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'$1 loading="lazy" />',
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$content
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);
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} catch ( Exception $e ) {
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wpa_superstar_log( "Lazy load error: " . $e->getMessage() );
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}
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return $content;
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}
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// Register the lazy load filters if add_filter exists
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if ( function_exists( 'add_filter' ) ) {
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add_filter( 'the_content', 'wpa_superstar_lazy_load_images' );
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add_filter( 'wp_get_attachment_image', 'wpa_superstar_lazy_load_images' );
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}
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/**
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* Advanced CSS minification function
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*
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* This function takes CSS content and returns a minified version by:
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* - Removing comments
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* - Removing whitespace
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* - Removing unnecessary semicolons
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* - Shortening color values
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* - Optimizing zero values
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*
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* @param string $css The CSS content to minify
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* @return string The minified CSS content
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*/
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function wpa_superstar_minify_css_content( $css ) {
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if ( empty( $css ) ) {
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return $css;
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}
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try {
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// Remove comments
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$css = preg_replace( '/\/\*[\s\S]*?\*\//', '', $css );
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// Remove whitespace around key characters
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$css = preg_replace( '/\s*([{}:;,])\s*/', '$1', $css );
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// Remove trailing whitespace
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$css = preg_replace( '/\s+/', ' ', $css );
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// Remove unnecessary semicolons
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$css = str_replace( ';}', '}', $css );
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// Convert rgb to hex where shorter
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$css = preg_replace_callback( '/rgb\s*\(\s*([0-9]+)\s*,\s*([0-9]+)\s*,\s*([0-9]+)\s*\)/i', function( $matches ) {
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$r = intval( $matches[1] );
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$g = intval( $matches[2] );
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$b = intval( $matches[3] );
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// Only convert if the hex representation would be shorter
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if ( $r < 256 && $g < 256 && $b < 256 ) {
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$hex = sprintf( "#%02x%02x%02x", $r, $g, $b );
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// Check if it can be shortened to #XXX format
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if ( preg_match( '/#([0-9a-f])\1([0-9a-f])\2([0-9a-f])\3/i', $hex ) ) {
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$hex = preg_replace( '/#([0-9a-f])\1([0-9a-f])\2([0-9a-f])\3/i', '#$1$2$3', $hex );
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}
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return $hex;
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}
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return $matches[0];
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}, $css );
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// Optimize zero values
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$css = preg_replace( '/([:\s])0(?:px|pt|em|rem|%|in|cm|mm|pc|ex|vw|vh|vmin|vmax)/', '$10', $css );
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// Shorten multiple zeros
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$css = preg_replace( '/\b0 0 0 0\b/', '0', $css );
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$css = preg_replace( '/\b0 0 0\b/', '0', $css );
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$css = preg_replace( '/\b0 0\b/', '0', $css );
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// Shorten colors where possible (e.g., #ffffff to #fff)
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$css = preg_replace( '/#([0-9a-f])\1([0-9a-f])\2([0-9a-f])\3/i', '#$1$2$3', $css );
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} catch ( Exception $e ) {
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wpa_superstar_log( "CSS content minify error: " . $e->getMessage() );
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return $css; // Return original on error
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}
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return trim( $css );
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}
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/**
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* Minify CSS in HTML content to reduce file size
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*
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* @param string $html The HTML content to process
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* @return string The processed HTML with minified CSS
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*/
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function wpa_superstar_minify_css( $html ) {
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// Early return if admin or option disabled
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if ( ( function_exists( 'is_admin' ) && is_admin() ) ||
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( function_exists( 'get_option' ) && ! get_option( 'wpa_superstar_minify_css', 0 ) )
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) {
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return $html;
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}
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try {
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$html = preg_replace(
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array( '/\s+/', '/\/\*.*?\*\//s', '/;}/' ),
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array( ' ', '', '}' ),
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$html
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);
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} catch ( Exception $e ) {
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wpa_superstar_log( "CSS minify error: " . $e->getMessage() );
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}
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return trim( $html );
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}
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// Register the CSS minify filter if add_filter exists
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if ( function_exists( 'add_filter' ) ) {
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add_filter( 'style_loader_tag', 'wpa_superstar_minify_css' );
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}
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/**
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* Minify JavaScript in HTML content to reduce file size
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*
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* @param string $html The HTML content to process
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* @return string The processed HTML with minified JavaScript
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*/
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function wpa_superstar_minify_js( $html ) {
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// Early return if admin or option disabled
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if ( ( function_exists( 'is_admin' ) && is_admin() ) ||
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( function_exists( 'get_option' ) && ! get_option( 'wpa_superstar_minify_js', 0 ) )
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) {
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return $html;
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}
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try {
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$html = preg_replace(
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array( '/\s+/', '/\/\*.*?\*\//s', '//.*?\n/' ),
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array( ' ', '', '' ),
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$html
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);
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} catch ( Exception $e ) {
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wpa_superstar_log( "JS minify error: " . $e->getMessage() );
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}
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return trim( $html );
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}
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// Register the JS minify filter if add_filter exists
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if ( function_exists( 'add_filter' ) ) {
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add_filter( 'script_loader_tag', 'wpa_superstar_minify_js' );
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}
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/**
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* Minify inline CSS in HTML content
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*
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* @param string $html The HTML content containing style tags
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* @return string The HTML with minified inline CSS
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*/
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function wpa_superstar_minify_inline_css( $html ) {
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// Early return if admin or option disabled
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if ( ( function_exists( 'is_admin' ) && is_admin() ) ||
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( function_exists( 'get_option' ) && ! get_option( 'wpa_superstar_minify_inline_css', 0 ) )
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) {
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return $html;
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}
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try {
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// Find and minify all inline style blocks
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$html = preg_replace_callback(
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'/<style[^>]*>(.*?)<\/style>/si',
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function( $matches ) {
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$minified_css = wpa_superstar_minify_css_content( $matches[1] );
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return '<style>' . $minified_css . '</style>';
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},
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$html
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);
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} catch ( Exception $e ) {
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wpa_superstar_log( "Inline CSS minify error: " . $e->getMessage() );
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}
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return $html;
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}
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// Apply the inline CSS minify filters if add_filter exists
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if ( function_exists( 'add_filter' ) ) {
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add_filter( 'wp_head', 'wpa_superstar_minify_inline_css', 999 );
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add_filter( 'wp_footer', 'wpa_superstar_minify_inline_css', 999 );
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}
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