Improve image thumbnail

And auto download apk for android

thumbnail.php

@@ -0,0 +1,46 @@
+<?php
+
+error_reporting(E_ALL);
+ini_set('display_errors', TRUE);
+ini_set('display_startup_errors', TRUE);
+
+$root = $_SERVER["DOCUMENT_ROOT"];
+
+$directory = "/uploads/";
+
+if(isset($_GET["file"])) {
+    $file = $root.urldecode($_GET["file"]);
+    $size = isset($_GET["size"]) ? $_GET["size"] : 100;
+    if(file_exists($file)) {
+        echo getthumbnail($file, $size);
+        exit();
+    }
+    else {
+        header("HTTP/1.1 400 File not Found");
+        echo $file." not Found";
+        exit();
+    }
+}
+
+
+function getthumbnail(string $file, int $size)
+{
+
+    list($width, $height) = getimagesize($file);
+
+    // Create an Imagick object
+    $imagick = new Imagick($file);
+
+    // Function to set the background color
+    $imagick->setbackgroundcolor('rgb(0, 0, 0)');
+
+    // Use thumbnailImage function
+    $imagick->thumbnailImage($width*$size/$height, $size, true, true);
+    header("Content-Type: image/jpg");
+
+    // Display the output image 
+    echo $imagick->getImageBlob();
+
+}
+
+?>