Filter target (Delimiter)

<?php
/**
 * @Author: BUG7SEC TEAM
 * @Date:   2016-11-17 15:02:37
 * @Last Modified by:   SHOR7CUT
 * @Last Modified time: 2016-11-17 15:27:48
 */
//error_reporting(0);
class Filter
{
    public function load($file){
        if(! file_exists($file) ){
            exit();
        }else{
            return file_get_contents($file);
        }
    }
    public function ngesave($data,$name){
        $file = fopen($name, "a+");
        fwrite($file, $data);
        fclose($file);
    }
    public function readline($pesan){
            echo "[Filter] ".$pesan;
            $answer =  rtrim( fgets( STDIN ));
            return $answer;
    }
    public function run(){
        $file       = $this->readline("Masukan Nama File : ");
        $file       = $this->load($file);
        echo "[Filter] 1. New Line (Windows) | 2. New Line (Linux)\r\n";
        $delim = $this->readline("Pilih Delimiter (1-2): ");
        switch ($delim) {
            case '1':
                $delim = "\r\n";
            break;
            case '2':
                $delim = "\n";
            break;
            case '3':
                $delim = ",";
            break;
            case '4':
                $delim = "|";
            break;

            default:
                exit();
            break;
        }
        $delimnew   = $this->readline("Masukan Delimiter Baru : ");
        $name       = $this->readline("Output name and extension: ");
        /****************************************/
        $explode = explode($delim, $file);
        foreach ($explode as $key => $value) {
            $value = str_replace(" ", "", trim($value));
            echo "[+] ".$key."|".$value."\r\n";
            $this->ngesave($value.$delimnew,$name);
        }
    }
}
$runs = new Filter;
$runs->run();