Download low resolution image instead of high resolution in php - php

Question

I develop a social android app that users upload high quality image to my server and then download them to show in list view in app feed.
Uploaded image save in ./uploads/ directory in my server. I use the below code in PHP to save image in server:
<?php
// Path to move uploaded files
error_reporting(E_ALL ^ E_DEPRECATED);
include 'conf.php';
$target_path = "uploads/";
// array for final json respone
$response = array();
// getting server ip address
$server_ip = gethostbyname(gethostname());
// final file url that is being uploaded
$file_upload_url = 'http://' . $server_ip . '/' . 'AndroidFileUpload' . '/' . $target_path;
if (isset($_FILES['image']['name'])) {
$target_path = $target_path . basename($_FILES['image']['name']);
try {
// Throws exception incase file is not being moved
if (!move_uploaded_file($_FILES['image']['tmp_name'], $target_path)) {
// make error flag true
print "error1";
}
print basename($_FILES['image']['name']);
} catch (Exception $e) {
// Exception occurred. Make error flag true
print "error2";
}
} else {
// File parameter is missing
print "error3";
}
?>
Now I want to save low resolution of every image in different directory(or in real time get low resolution ) and get url of it and using php send to android app and users in my app can see a thumbnail or low resolution of image before download whole image.
How I should do it?

Answer 1

Easy. You can use the code below to do this :
<?php
$org_info = getimagesize("source image");
echo $org_info[3] . '<br><br>';
$rsr_org = imagecreatefromjpeg("source image");
$rsr_scl = imagescale($rsr_org, new_width, new_height, IMG_BICUBIC_FIXED);
imagejpeg($rsr_scl, "destination image");
imagedestroy($rsr_org);
imagedestroy($rsr_scl);
?>