initial commit

app/webroot/captcha.php

@@ -0,0 +1,121 @@
+<?php
+session_start();
+//You can customize your captcha settings here
+ 
+$captcha_code = '';
+$captcha_image_height = 50;
+$captcha_image_width = 120;
+$total_characters_on_image = 4;
+ 
+//The characters that can be used in the CAPTCHA code.
+//avoid all confusing characters and numbers (For example: l, 1 and i)
+$possible_captcha_letters = 'bcdfghjkmnpqrstvwxyz23456789';
+$captcha_font = __DIR__ . '/fonts/arial.ttf';//'monofont.ttf';
+ 
+$random_captcha_dots = 50;
+$random_captcha_lines = 25;
+$captcha_text_color = "0x142864";
+$captcha_noise_color = "0x142864";
+ 
+ 
+$count = 0;
+while ($count < $total_characters_on_image) { 
+$captcha_code .= substr(
+ $possible_captcha_letters,
+ mt_rand(0, strlen($possible_captcha_letters)-1),
+ 1);
+$count++;
+}
+ 
+$captcha_font_size = $captcha_image_height * 0.65;
+$captcha_image = @imagecreate(
+ $captcha_image_width,
+ $captcha_image_height
+ );
+ 
+/* setting the background, text and noise colours here */
+$background_color = imagecolorallocate(
+ $captcha_image,
+ 255,
+ 155,
+ 255
+ );
+ 
+$array_text_color = hextorgb($captcha_text_color);
+$captcha_text_color = imagecolorallocate(
+ $captcha_image,
+ $array_text_color['red'],
+ $array_text_color['green'],
+ $array_text_color['blue']
+ );
+ 
+$array_noise_color = hextorgb($captcha_noise_color);
+$image_noise_color = imagecolorallocate(
+ $captcha_image,
+ $array_noise_color['red'],
+ $array_noise_color['green'],
+ $array_noise_color['blue']
+ );
+ 
+/* Generate random dots in background of the captcha image */
+for( $count=0; $count<$random_captcha_dots; $count++ ) {
+imagefilledellipse(
+ $captcha_image,
+ mt_rand(0,$captcha_image_width),
+ mt_rand(0,$captcha_image_height),
+ 2,
+ 3,
+ $image_noise_color
+ );
+}
+ 
+/* Generate random lines in background of the captcha image */
+for( $count=0; $count<$random_captcha_lines; $count++ ) {
+imageline(
+ $captcha_image,
+ mt_rand(0,$captcha_image_width),
+ mt_rand(0,$captcha_image_height),
+ mt_rand(0,$captcha_image_width),
+ mt_rand(0,$captcha_image_height),
+ $image_noise_color
+ );
+}
+ 
+/* Create a text box and add 6 captcha letters code in it */
+$text_box = imagettfbbox(
+ $captcha_font_size,
+ 0,
+ $captcha_font,
+ $captcha_code
+ ); 
+$x = ($captcha_image_width - $text_box[4])/2;
+$y = ($captcha_image_height - $text_box[5])/2;
+imagettftext(
+ $captcha_image,
+ $captcha_font_size,
+ 0,
+ $x,
+ $y,
+ $captcha_text_color,
+ $captcha_font,
+ $captcha_code
+ );
+ 
+/* Show captcha image in the html page */
+// defining the image type to be shown in browser widow
+$_SESSION['captcha'] = $captcha_code;
+$cookie_name = "ecc";
+$cookie_value = $captcha_code;
+setcookie($cookie_name, $cookie_value, time() + (60 * 5), "/"); // 86400 = 1 day
+
+header('Content-Type: image/jpeg'); 
+imagejpeg($captcha_image); //showing the image
+imagedestroy($captcha_image); //destroying the image instance
+ 
+function hextorgb ($hexstring){
+  $integar = hexdec($hexstring);
+  return array("red" => 0xFF & ($integar >> 0x10),
+               "green" => 0xFF & ($integar >> 0x8),
+               "blue" => 0xFF & $integar);
+    }
+?>