Download all contents from FTP server without time limit - php

Question

I want to download the contents (files, folders, and sub-folders) of a directory from a FTP server using PHP.
I was able to do it using this function:
function ftp_sync ($dir) {
global $conn_id;
if ($dir != ".") {
if (ftp_chdir($conn_id, $dir) == false) {
echo ("Change Dir Failed: $dir<BR>\r\n");
return;
}
if (!(is_dir($dir)))
mkdir($dir);
chdir ($dir);
}
$contents = ftp_nlist($conn_id, ".");
foreach ($contents as $file) {
if ($file == '.' || $file == '..')
continue;
if (#ftp_chdir($conn_id, $file)) {
ftp_chdir ($conn_id, "..");
ftp_sync ($file);
}
else
ftp_get($conn_id, $file, $file, FTP_BINARY);
}
ftp_chdir ($conn_id, "..");
chdir ("..");
}
Source: https://stackoverflow.com/a/5650503/10349407
But after some time; the script times out from the browser because it takes so long time as the contents of the folder are large.
I tried to set:
ini_set('max_execution_time', 0);
set_time_limit(0);
but I still get the error Warning: set_time_limit() has been disabled for security reasons as I am on a shared hosting.
So, my question: Is it possible to do redirects in the above PHP function so it starts a new page for each file that it downloads (this is my suggestion to prevent the timeout limit)
So a line like:
header("Location: " . __FILE__ . "?file=$file");
where it should download the file which is the value of $_GET['file'] then redirect again and so on until it finishes downloading the whole contents.
EDIT: This is my try but it doesn't work :/
function ftp_sync ($dir) {
global $conn_id;
if( isset($_GET['cd']) ) {
$dir = $_GET['cd'];
}
if ($dir != ".") {
if (ftp_chdir($conn_id, $dir) == false) {
echo ("Change Dir Failed: $dir<BR>\r\n");
return;
}
if (!(is_dir($dir)))
mkdir($dir);
chdir ($dir);
}
$contents = ftp_nlist($conn_id, ".");
foreach ($contents as $file) {
if ($file == '.' || $file == '..')
continue;
if (#ftp_chdir($conn_id, $file)) {
ftp_chdir ($conn_id, "..");
ftp_sync ($file);
header("refresh:0.5;url=" . "ftp.php" . "?file=$file&cd=" . ftp_pwd($conn_id));
die();
}
else {
ftp_get($conn_id, $file, $file, FTP_BINARY);
}
}
ftp_chdir ($conn_id, "..");
chdir ("..");
}

Answer 1

I finally did it on my own!
All what I needed was a way to list ALL the contents of the FTP server recursively (files, directories, sub-directories).
And I found this awesome class: https://www.phpclasses.org/package/7707-PHP-List-recursively-all-files-in-a-FTP-server.html
So, all what you've to do is to download this class and write this script which I've spent hours on (although it is simple xD).
<?php
error_reporting(0);
set_time_limit(0);
session_start();
// SETTINGS
$ftp_hostname = "";
$ftp_port = 21;
$ftp_username = "";
$ftp_password = "";
$where_to_download = "."; // Without the last slash!
// ---------------------
// NOTE: If you want to end the current session; go to http://example.com/filename.php?end
if( isset($_GET['end']) ) {
session_unset();
session_destroy();
die("Successfully ended the session.");
}
include("ftpcrawler.php");
$ftpcrawler = new ftpcrawler;
$ftpcrawler->server = "ftp://$ftp_username:$ftp_password#$ftp_hostname:$ftp_port/";
if( !isset($_SESSION['array']) ) {
$_SESSION['array'] = $ftpcrawler->crawl();
}
if( empty($_SESSION['array']) ) {
echo "Finished downloading everything , or theres no files to download.";
session_unset();
session_destroy();
die();
}
foreach($_SESSION['array'] as $item) {
if( $item['type'] == "file" ) {
$ITEM_DIRECTORY = str_replace($item['name'], "", $item['path']);
}
if( $item['type'] == "directory" ) {
$ITEM_DIRECTORY = $item['path'];
}
if (!file_exists($where_to_download . $ITEM_DIRECTORY) && !is_dir($where_to_download . $ITEM_DIRECTORY)) {
mkdir($where_to_download . $ITEM_DIRECTORY, 0777, TRUE);
}
if( $item['type'] == "file" ) {
$data = #file_get_contents("ftp://$ftp_username:$ftp_password#$ftp_hostname:$ftp_port" . $item['path']);
file_put_contents($where_to_download . $item['path'], $data);
}
unset($_SESSION['array'][$item['path']]); // Remove the item from the array.
echo "Downloaded/Created Folder " . $item['path'] . " !";
header( "refresh:0.2;url=" . basename(__FILE__) );
die();
}
?>
Save the file with the name you need and make sure that ftpcrawler.php is in the same directory of the script.