Add exams from exam156 to exam199

exam164/generate.php

@@ -0,0 +1,31 @@
+<?php 
+session_start();
+
+header('Content-type: image/jpeg');
+
+$text = $_SESSION['secure'];
+$font_size = 30;
+
+$image_width = 120;
+$image_height = 40;
+
+$image = imagecreate($image_width,$image_height);
+imagecolorallocate($image, 255, 255, 255); 
+$text_color = imagecolorallocate($image, 0, 0, 0);
+
+for ($x = 1; $x <= 30; $x++) {
+    $x1 = rand(1,100);
+    $y1 = rand(1,100);
+    $x2 = rand(1,100);
+    $y2 = rand(1,100);
+    
+    imageline($image,$x1,$y1,$x2,$y2,$text_color);
+}
+
+
+$font_filename = '/var/www/nikola/practice/exam164/HappySwirly-KVB7l.ttf'; // mora cela putanja 
+
+imagettftext($image, $font_size, 0, 15, 30,$text_color,$font_filename,$text);
+imagejpeg($image);
+
+?> 

exam164/index.php

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+<?php 
+session_start();
+
+
+if(!isset($_POST['secure'])){
+    $_SESSION['secure'] = rand(1000, 9999);
+}else {
+    if($_POST['secure'] == $_SESSION['secure']){
+        echo 'You are not robot';   
+    } else {
+        echo 'Try again';
+        $_SESSION['secure'] = rand(1000, 9999);
+    }
+}
+   
+
+
+
+?>
+<br>
+<img src="generate.php"/><br>
+
+<form action="index.php" method="POST">
+    Write a number from picture:
+    <input type="text" size="6"name="secure">
+    <input type="submit" value="Submit">
+</form>