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Add CSS minifier

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This commit is contained in:
Marcus Quinn
2025-03-13 21:38:14 +00:00
parent a9ce371af5
commit 69422f7cd0
1 changed files with 183 additions and 13 deletions
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190
includes/speed-functions.php
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@ -1,19 +1,49 @@
<?php
/**
* Speed optimization functions
* Speed optimization functions for WPA Superstar plugin
*
* @package WPA_Superstar
* @since 1.0.0
*/
// Logging function
function wpa_superstar_log( $message ) {
$log_file = WP_CONTENT_DIR . '/wpa-superstar.log';
$time = current_time( 'mysql' );
file_put_contents( $log_file, "[$time] $message\n", FILE_APPEND );
// If this file is called directly, abort
if ( ! defined( 'ABSPATH' ) && ! defined( 'WPINC' ) ) {
// Still allow the file to be loaded for IDE analysis
defined( 'WPINC' ) || define( 'WPINC', 'wp-includes' );
defined( 'ABSPATH' ) || define( 'ABSPATH', dirname( dirname( __FILE__ ) ) . '/' );
defined( 'WP_CONTENT_DIR' ) || define( 'WP_CONTENT_DIR', ABSPATH . 'wp-content' );
}
/**
* Logging function for the plugin
*
* @param string $message The message to log
* @return void
*/
function wpa_superstar_log( $message ) {
// Safe check for WordPress constants
if ( defined( 'WP_CONTENT_DIR' ) ) {
$log_file = WP_CONTENT_DIR . '/wpa-superstar.log';
$time = function_exists( 'current_time' ) ? current_time( 'mysql' ) : date( 'Y-m-d H:i:s' );
@file_put_contents( $log_file, "[$time] $message\n", FILE_APPEND );
}
}
/**
* Add lazy loading attribute to images to improve page load speed
*
* @param string $content The content to process
* @return string The processed content with lazy loading
*/
function wpa_superstar_lazy_load_images( $content ) {
if ( is_admin() || ! $content || ! get_option( 'wpa_superstar_lazy_load', 1 ) ) {
// Early return if admin or option disabled
if ( ! $content ||
( function_exists( 'is_admin' ) && is_admin() ) ||
( function_exists( 'get_option' ) && ! get_option( 'wpa_superstar_lazy_load', 1 ) )
) {
return $content;
}
try {
$content = preg_replace(
'/(<img[^>]+)\/?>/i',
@ -23,15 +53,98 @@ function wpa_superstar_lazy_load_images( $content ) {
} catch ( Exception $e ) {
wpa_superstar_log( "Lazy load error: " . $e->getMessage() );
}
return $content;
}
// Register the lazy load filters if add_filter exists
if ( function_exists( 'add_filter' ) ) {
add_filter( 'the_content', 'wpa_superstar_lazy_load_images' );
add_filter( 'wp_get_attachment_image', 'wpa_superstar_lazy_load_images' );
}
/**
* Advanced CSS minification function
*
* This function takes CSS content and returns a minified version by:
* - Removing comments
* - Removing whitespace
* - Removing unnecessary semicolons
* - Shortening color values
* - Optimizing zero values
*
* @param string $css The CSS content to minify
* @return string The minified CSS content
*/
function wpa_superstar_minify_css_content( $css ) {
if ( empty( $css ) ) {
return $css;
}
try {
// Remove comments
$css = preg_replace( '/\/\*[\s\S]*?\*\//', '', $css );
// Remove whitespace around key characters
$css = preg_replace( '/\s*([{}:;,])\s*/', '$1', $css );
// Remove trailing whitespace
$css = preg_replace( '/\s+/', ' ', $css );
// Remove unnecessary semicolons
$css = str_replace( ';}', '}', $css );
// Convert rgb to hex where shorter
$css = preg_replace_callback( '/rgb\s*\(\s*([0-9]+)\s*,\s*([0-9]+)\s*,\s*([0-9]+)\s*\)/i', function( $matches ) {
$r = intval( $matches[1] );
$g = intval( $matches[2] );
$b = intval( $matches[3] );
// Only convert if the hex representation would be shorter
if ( $r < 256 && $g < 256 && $b < 256 ) {
$hex = sprintf( "#%02x%02x%02x", $r, $g, $b );
// Check if it can be shortened to #XXX format
if ( preg_match( '/#([0-9a-f])\1([0-9a-f])\2([0-9a-f])\3/i', $hex ) ) {
$hex = preg_replace( '/#([0-9a-f])\1([0-9a-f])\2([0-9a-f])\3/i', '#$1$2$3', $hex );
}
return $hex;
}
return $matches[0];
}, $css );
// Optimize zero values
$css = preg_replace( '/([:\s])0(?:px|pt|em|rem|%|in|cm|mm|pc|ex|vw|vh|vmin|vmax)/', '$10', $css );
// Shorten multiple zeros
$css = preg_replace( '/\b0 0 0 0\b/', '0', $css );
$css = preg_replace( '/\b0 0 0\b/', '0', $css );
$css = preg_replace( '/\b0 0\b/', '0', $css );
// Shorten colors where possible (e.g., #ffffff to #fff)
$css = preg_replace( '/#([0-9a-f])\1([0-9a-f])\2([0-9a-f])\3/i', '#$1$2$3', $css );
} catch ( Exception $e ) {
wpa_superstar_log( "CSS content minify error: " . $e->getMessage() );
return $css; // Return original on error
}
return trim( $css );
}
/**
* Minify CSS in HTML content to reduce file size
*
* @param string $html The HTML content to process
* @return string The processed HTML with minified CSS
*/
function wpa_superstar_minify_css( $html ) {
if ( is_admin() || ! get_option( 'wpa_superstar_minify_css', 0 ) ) {
// Early return if admin or option disabled
if ( ( function_exists( 'is_admin' ) && is_admin() ) ||
( function_exists( 'get_option' ) && ! get_option( 'wpa_superstar_minify_css', 0 ) )
) {
return $html;
}
try {
$html = preg_replace(
array( '/\s+/', '/\/\*.*?\*\//s', '/;}/' ),
@ -41,14 +154,29 @@ function wpa_superstar_minify_css( $html ) {
} catch ( Exception $e ) {
wpa_superstar_log( "CSS minify error: " . $e->getMessage() );
}
return trim( $html );
}
add_filter( 'style_loader_tag', 'wpa_superstar_minify_css' );
// Register the CSS minify filter if add_filter exists
if ( function_exists( 'add_filter' ) ) {
add_filter( 'style_loader_tag', 'wpa_superstar_minify_css' );
}
/**
* Minify JavaScript in HTML content to reduce file size
*
* @param string $html The HTML content to process
* @return string The processed HTML with minified JavaScript
*/
function wpa_superstar_minify_js( $html ) {
if ( is_admin() || ! get_option( 'wpa_superstar_minify_js', 0 ) ) {
// Early return if admin or option disabled
if ( ( function_exists( 'is_admin' ) && is_admin() ) ||
( function_exists( 'get_option' ) && ! get_option( 'wpa_superstar_minify_js', 0 ) )
) {
return $html;
}
try {
$html = preg_replace(
array( '/\s+/', '/\/\*.*?\*\//s', '//.*?\n/' ),
@ -58,6 +186,48 @@ function wpa_superstar_minify_js( $html ) {
} catch ( Exception $e ) {
wpa_superstar_log( "JS minify error: " . $e->getMessage() );
}
return trim( $html );
}
// Register the JS minify filter if add_filter exists
if ( function_exists( 'add_filter' ) ) {
add_filter( 'script_loader_tag', 'wpa_superstar_minify_js' );
}
/**
* Minify inline CSS in HTML content
*
* @param string $html The HTML content containing style tags
* @return string The HTML with minified inline CSS
*/
function wpa_superstar_minify_inline_css( $html ) {
// Early return if admin or option disabled
if ( ( function_exists( 'is_admin' ) && is_admin() ) ||
( function_exists( 'get_option' ) && ! get_option( 'wpa_superstar_minify_inline_css', 0 ) )
) {
return $html;
}
try {
// Find and minify all inline style blocks
$html = preg_replace_callback(
'/<style[^>]*>(.*?)<\/style>/si',
function( $matches ) {
$minified_css = wpa_superstar_minify_css_content( $matches[1] );
return '<style>' . $minified_css . '</style>';
},
$html
);
} catch ( Exception $e ) {
wpa_superstar_log( "Inline CSS minify error: " . $e->getMessage() );
}
return $html;
}
// Apply the inline CSS minify filters if add_filter exists
if ( function_exists( 'add_filter' ) ) {
add_filter( 'wp_head', 'wpa_superstar_minify_inline_css', 999 );
add_filter( 'wp_footer', 'wpa_superstar_minify_inline_css', 999 );
}