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library/jquery-validation-1.17.0/demo/captcha/images/image.php

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+<?php
+
+// Begin the session
+session_start();
+
+// If the session is not present, set the variable to an error message
+if(!isset($_SESSION['captcha_id']))
+	$str = 'ERROR!';
+// Else if it is present, set the variable to the session contents
+else
+	$str = $_SESSION['captcha_id'];
+
+// Set the content type
+header('Content-Type: image/png');
+header('Cache-Control: no-cache');
+
+// Create an image from button.png
+$image = imagecreatefrompng('button.png');
+
+// Set the font colour
+$colour = imagecolorallocate($image, 183, 178, 152);
+
+// Set the font
+$font = '../fonts/Anorexia.ttf';
+
+// Set a random integer for the rotation between -15 and 15 degrees
+$rotate = rand(-15, 15);
+
+// Create an image using our original image and adding the detail
+imagettftext($image, 14, $rotate, 18, 30, $colour, $font, $str);
+
+// Output the image as a png
+imagepng($image);