mmmmm

function create_css(&$tab){
    $all_values = [];
    if (!file_exists('style.css')) {
        for ($i = 0; $i < count($tab); $i++) {
            $tmp = getimagesize($tab[$i]);
            array_push($all_values, $tmp);;
            $path = explode("/", $tab[$i]);
            $path = end($path);
            $path =str_replace(".","_" ,$path );
            static $back_pos = 0;
            $height = "#" .$path. "{\n"."width :".$all_values[$i][0]."px;\n"
               ."height :".$all_values[$i][1]."px;\n"."display:inline-block;\n"
                ."background-repeat: no-repeat; \n"
                ."background-position: -" .$back_pos ." 0px; \n"
                ."background-image: url('sprite.png');" ."\n}" ."\n \n" ;
            $back_pos += $all_values[$i][0];
            file_put_contents('style.css', $height, FILE_APPEND);
        }
    }
    else if(file_exists('style.css')){
        unlink('style.css');
        create_css($tab);
    }
}