PHP Script to scan CSS class in folder, it will create json array you can use to strip unused css

scanCSS.php

<?php
$class = array();

$path = "template/";
cariFile($path);
print_r($class);
file_put_contents("css_class.json",json_encode($class,JSON_PRETTY_PRINT));
//class="
function cariFile($path){
    $list = scandir($path);
    foreach($list as $file){
        if(!in_array($file,['.','..'])){
            if(is_dir($path.$file)){
                cariFile($path.$file."/");
            }else{
                $isi = file_get_contents($path.$file);
                while(strpos($isi,'class="')!==false){
                    $tmp = substr($isi,strpos($isi,'class="')+7);
                    $css = substr($tmp,0,strpos($tmp,'"'));
                    parsingCSS($css);
                    $isi = $tmp;
                }
            }
        }
    }
}

function parsingCSS($css){
    global $class;
    $css = explode(" ",$css);
    $class = array_merge($class,$css);
    $class =  array_unique(array_filter($class));
}