[HTML Compress] This function can be used to minify HTML #php #function #HTMLminify

html-compress.php

<?php

/* ----------------------------------------------------------------------------------- */
/* [HTML Compress] This function can be used to minify HTML #php #function #HTMLminify */
/* ----------------------------------------------------------------------------------- */

function html_compress($url) {
  /*
   + Remove white spaces and tags before and after HTML tags
   + Remove comments
   + Replace multiple empty lines with just spaces and tabs with with a single empty line
   + Remove spaces and tabs that are between two HTML tags
   + Remove spaces, line breaks and tabs:
     - After an end curly brace eventually followed by a comma
     - Between and end brace and and start curly brace
     - Between a comma and a curly brace
     - Between a tag name and a tag value
  */
  $regex = array(
    '/\>[^\S ]+/s' => '>',
    '/[^\S ]+\</s' => '<',
    '/([\t ])+/s' => ' ',
    '/^([\t ])+/m' => '',
    '/([\t ])+$/m' => '',
    '~//[a-zA-Z0-9 ]+$~m' => '',
    '/[\r\n]+([\t ]?[\r\n]+)+/s' => "\n",
    '/\>[\r\n\t ]+\</s' => '><',
    '/}[\r\n\t ]+/s' => '}',
    '/}[\r\n\t ]+,[\r\n\t ]+/s' => '},',
    '/\)[\r\n\t ]?{[\r\n\t ]+/s' => '){',
    '/,[\r\n\t ]?{[\r\n\t ]+/s' => ',{',
    '/\),[\r\n\t ]+/s' => '),',
    '~([\r\n\t ])?([a-zA-Z0-9]+)=\"([a-zA-Z0-9_\\-]+)\"([\r\n\t ])?~s' => '$1$2=$3$4');
  return preg_replace(array_keys($regex), array_values($regex), file_get_contents($url));
}

$url = 'https://www.heise.de/';
echo '<base href="'.$url.'" />'.html_compress($url);