I write one php code what totaly filter all html elements but is integrated in main index.php on the root. That made rendering a little faster but you also can do CDN for all your images and media. That will speedup your page a mutch better. I normaly point /wp-content/uploads/ to subdomain and my WP get all media from that subdomain what made WP 20 times faster.
UPDATE
I made one great regex what can work inside buffer. Copy/Paste this script in your theme functions.php and see magic.
NOTE: If your source contain bad javascript or css what’s not follow
rules, this may broke website. But I use it on arround 100 templates,
I never experience some issue. Work nice With Elementor and WC Builder
/* ----------------------------------------------------------------------------
W3C Fix and HTML minifier by Ivijan-Stefan Stipic <[email protected]>
---------------------------------------------------------------------------- */
add_action('wp_loaded', 'atm_output_buffer_start');
add_action('shutdown', 'atm_output_buffer_end');
function atm_output_buffer_start() {
ob_start("atm_output_callback");
}
function atm_output_buffer_end() {
ob_get_clean();
}
function atm_output_callback($buffer) {
if(!is_admin() && !(defined('DOING_AJAX') && DOING_AJAX))
{
// Remove type from javascript and CSS
$buffer = preg_replace( "%[ ]type=[\'\"]text\/(javascript|css)[\'\"]%", '', $buffer );
// Add alt attribute to images where not exists
$buffer = preg_replace( '%(<img(?!.*?alt=([\'"]).*?\2)[^>]*?)(/?>)%', '$1 alt="" $3', $buffer );
$buffer = preg_replace( '%\s+alt="%', ' alt="', $buffer );
// clear HEAD
$buffer = preg_replace_callback('/(?=<head(.*?)>)(.*?)(?<=<\/head>)/s',
function($matches) {
return preg_replace(array(
'/<!--(?!\s*(?:\[if [^\]]+]|<!|>))(?:(?!-->).)*-->/s', // delete HTML comments
/* Fix HTML */
'/\>[^\S ]+/s', // strip whitespaces after tags, except space
'/[^\S ]+\</s', // strip whitespaces before tags, except space
'/\>\s+\</', // strip whitespaces between tags
), array(
'',
/* Fix HTML */
'>', // strip whitespaces after tags, except space
'<', // strip whitespaces before tags, except space
'><', // strip whitespaces between tags
), $matches[2]);
}, $buffer);
// clear BODY
$buffer = preg_replace_callback('/(?=<body(.*?)>)(.*?)(?<=<\/body>)/s',
function($matches) {
return preg_replace(array(
'/<!--(?!\s*(?:\[if [^\]]+]|<!|>))(?:(?!-->).)*-->/s', // delete HTML comments
/* Fix HTML */
'/\>[^\S ]+/s', // strip whitespaces after tags, except space
'/[^\S ]+\</s', // strip whitespaces before tags, except space
'/\>\s+\</', // strip whitespaces between tags
), array(
'', // delete HTML comments
/* Fix HTML */
'>', // strip whitespaces after tags, except space
'<', // strip whitespaces before tags, except space
'> <', // strip whitespaces between tags
), $matches[2]);
}, $buffer);
$buffer = preg_replace_callback('/(?=<script(.*?)>)(.*?)(?<=<\/script>)/s',
function($matches) {
return preg_replace(array(
'@\/\*(.*?)\*\/@s', // delete JavaScript comments
'@((^|\t|\s|\r)\/{2,}.+?(\n|$))@s', // delete JavaScript comments
'@(\}(\n|\s+)else(\n|\s+)\{)@s', // fix "else" statemant
'@((\)\{)|(\)(\n|\s+)\{))@s', // fix brackets position
//'@(\}\)(\t+|\s+|\n+))@s', // fix closed functions
'@(\}(\n+|\t+|\s+)else\sif(\s+|)\()@s', // fix "else if"
'@(if|for|while|switch|function)\(@s', // fix "if, for, while, switch, function"
'@\s+(\={1,3}|\:)\s+@s', // fix " = and : "
'@\$\((.*?)\)@s', // fix $( )
'@(if|while)\s\((.*?)\)\s\{@s', // fix "if|while ( ) {"
'@function\s\(\s+\)\s{@s', // fix "function ( ) {"
'@(\n{2,})@s', // fix multi new lines
'@([\r\n\s\t]+)(,)@s', // Fix comma
'@([\r\n\s\t]+)?([;,{}()]+)([\r\n\s\t]+)?@', // Put all inline
), array(
"\n", // delete JavaScript comments
"\n", // delete JavaScript comments
'}else{', // fix "else" statemant
'){', // fix brackets position
//"});\n", // fix closed functions
'}else if(', // fix "else if"
"$1(", // fix "if, for, while, switch, function"
" $1 ", // fix " = and : "
'$'."($1)", // fix $( )
"$1 ($2) {", // fix "if|while ( ) {"
'function(){', // fix "function ( ) {"
"\n", // fix multi new lines
',', // fix comma
"$2", // Put all inline
), $matches[2]);
}, $buffer);
// Clear CSS
$buffer = preg_replace_callback('/(?=<style(.*?)>)(.*?)(?<=<\/style>)/s',
function($matches) {
return preg_replace(array(
'/([.#]?)([a-zA-Z0-9,_-]|\)|\])([\s|\t|\n|\r]+)?{([\s|\t|\n|\r]+)(.*?)([\s|\t|\n|\r]+)}([\s|\t|\n|\r]+)/s', // Clear brackets and whitespaces
'/([0-9a-zA-Z]+)([;,])([\s|\t|\n|\r]+)?/s', // Let's fix ,;
'@([\r\n\s\t]+)?([;:,{}()]+)([\r\n\s\t]+)?@', // Put all inline
), array(
'$1$2{$5} ', // Clear brackets and whitespaces
'$1$2', // Let's fix ,;
"$2", // Put all inline
), $matches[2]);
}, $buffer);
// Clean between HEAD and BODY
$buffer = preg_replace( "%</head>([\s\t\n\r]+)<body%", '</head><body', $buffer );
// Clean between BODY and HTML
$buffer = preg_replace( "%</body>([\s\t\n\r]+)</html>%", '</body></html>', $buffer );
// Clean between HTML and HEAD
$buffer = preg_replace( "%<html(.*?)>([\s\t\n\r]+)<head%", '<html$1><head', $buffer );
}
return $buffer;
}
For CDN read THIS article.