Minify wordpress

minify.php

<?php

/**
 * Minify HTML
 */

class drivkraft_compression {

  /* Run compression */
  static function run() {
    add_action( 'get_header', __CLASS__ . '::drivkraft_html_minify_start' );
  }

  /* Capture HTML */
  static function drivkraft_html_minify_start()  {
    ob_start( 'drivkraft_compression::drivkraft_html_minyfy_finish' );
  }

  /* Remove all extra white space from all HTML */
  static function drivkraft_html_minyfy_finish( $html )  {

    $html = preg_replace( '/(?:(?:\/\*(?:[^*]|(?:\*+[^*\/]))*\*+\/)|(?:(?<!\:|\\\|\')\/\/.*))/', '', $html);

    /* Remove \r (return) from $html */
    $html = preg_replace("/<\/html>\s+/", "</html>", $html);

    /* Removes whitespace */
    $html = preg_replace("/^\s+/m", "", ( (string) $html ));

    /* Remove all aps and new lines */
    $html = str_replace( [ PHP_EOL ], '', $html );

    /* Bring back all the HTML in one line */
    return $html;
  }
}

drivkraft_compression::run();