Add exams from exam156 to exam199

exam161/generate.php

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+<?php 
+
+header('Content-type: image/jpeg');
+
+if(isset($_GET['source'])){
+    $source = $_GET['source'];
+
+    $watermark = imagecreatefrompng('php.png');
+
+    $watermark_height = imagesx($watermark);
+    $watermark_width = imagesy($watermark); // imagesx uzima sirinu ucitane slike
+
+    // Ova funkcija stvara praznu sliku s određenom širinom i visinom, koristeći prave boje umesto indeksiranih 
+    $image = imagecreatetruecolor($watermark_width, $watermark_height); 
+    $image = imagecreatefromjpeg($source);  
+
+    $image_size = getimagesize($source); 
+    $x = $image_size[0] - $watermark_width - 10;
+    $y = $image_size[1] - $watermark_height - 10;
+
+    imagecopymerge($image,$watermark,$x,$y, 0, 0,$watermark_width,$watermark_height, 40);
+    imagejpeg($image); // ili imagejpeg($image, $source.'.watermark.jp'); sto nam pravi sliku u folderu ako stavimo drugi parametar
+     
+    
+} else {
+    echo 'No source suplied';
+}
+
+?>

exam161/index.php

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+<img src="generate.php?source=phone2.jpg" />