Shell Programming and Scripting

<?php
/**
 * Apache Splunk script to verify if auth is required or not
 * Original Author: Damian HARt
 * Version : 1.0
 */
ini_set('memory_limit', '800M'); // Set ram limit
require('zebracurl.php');

if($argc === 3){
    $file = $argv[1];
    if(is_readable($file)){
        $handle = fopen($file, 'r');
        if ($handle){
            $i = 0;
            $curl = new Zebra_cURL();
            $line_id = 0;
            $total_lines = count_lines(__DIR__.DIRECTORY_SEPARATOR.$file);
            $url_to_check = array();
            $curl->threads = 100;
            $curl->option(array(CURLOPT_TIMEOUT => 20));
            echo 'Welcome in Apache Splunk detector'.PHP_EOL;
            echo '[!] Total lines to parse in '.$file.': '.$total_lines.PHP_EOL;
            echo '--------------------------------------------------------------------------------'.PHP_EOL;
            while (($uri = fgets($handle)) !== false){
                if (!empty($uri) ){
                    $url_to_check[] = trim($uri).':'.$argv[2].'/splunk/en-US/manager/search/apps/local';
                    if ($i === 99 || $line_id + 1 === $total_lines){
                        $curl->get($url_to_check, function($request){
                            if ($request->response[1] == CURLE_OK && $request->info['http_code'] === 200){
                                for ($_i = 0; $_i < count($request->headers['responses']); $_i++){
                                    $header_array = array_change_key_case($request->headers['responses'][$_i], CASE_LOWER);
                                    if (isset($header_array['Server'])){
                                        file_put_contents('results.txt', $request->info['original_url'].PHP_EOL,FILE_APPEND | LOCK_EX);
                                        echo '[+] '.$request->info['original_url'].PHP_EOL;
                                    }
                                }
                            }
                        });
                        $i = 0;
                        $url_to_check = array();
                    }
                }
                $i++;
                $line_id++;
            }
        } else {
            echo setColor('An error was occurred on file opening '.$config['input_file'], $with_color ? 'danger' : '').PHP_EOL;
            fclose($handle);
            unset($curl);
            die();
        }
        fclose($handle);
        unset($curl);
    }
}else { echo '[!] Usage: php splunk-detector.php LAN-IPs.txt 8000'; }

function count_lines($file){
    $total_lines = 0;
    if (file_exists($file)){
        $handle = fopen($file, "r");
        while (!feof($handle)){ if (fgets($handle) !== false) $total_lines += 1; }
        fclose($handle);
    } return $total_lines;
}