mirror of
https://github.com/fusionpbx/fusionpbx.git
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149 lines
3.6 KiB
PHP
149 lines
3.6 KiB
PHP
<?php
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/*
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FusionPBX
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Version: MPL 1.1
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The contents of this file are subject to the Mozilla Public License Version
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1.1 (the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.mozilla.org/MPL/
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Software distributed under the License is distributed on an "AS IS" basis,
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WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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for the specific language governing rights and limitations under the
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License.
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The Original Code is FusionPBX
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The Initial Developer of the Original Code is
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Mark J Crane <markjcrane@fusionpbx.com>
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Portions created by the Initial Developer are Copyright (C) 2019
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the Initial Developer. All Rights Reserved.
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Contributor(s):
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Mark J Crane <markjcrane@fusionpbx.com>
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*/
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/**
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* captcha class
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*
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* @method string get
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*/
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class captcha {
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/**
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* Called when the object is created
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*/
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public $code;
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/**
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* Class constructor
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*/
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public function __construct() {
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}
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/**
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* Returns a Base64 encoded version of the CAPTCHA image.
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*
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* @return string The Base64 encoded CAPTCHA image data.
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*/
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public function image_base64() {
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return base64_encode($this->image_captcha());
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}
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/**
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* Generates a CAPTCHA image.
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*
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* Requires the object property code for the text to create
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*
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* @return string The CAPTCHA image buffer.
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*/
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public function image_captcha() {
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//$_SESSION["captcha"] = substr(md5(uuid()), 0, 6);
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//$text = $_SESSION["captcha"];
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$text = $this->code;
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// Set the font path
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$font_path = dirname(__DIR__, 2) . "/resources/captcha/fonts";
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// Array of fonts
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//$fonts[] = 'ROUGD.TTF';
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//$fonts[] = 'Zebra.ttf';
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//$fonts[] = 'hanshand.ttf';
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$fonts = glob($font_path . '/*.[tT][tT][fF]');
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//print_r($fonts);
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//exit;
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// Randomize the fonts
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srand();
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$random = (rand() % count($fonts));
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//$font = $font_path.'/'.$fonts[$random];
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$font = $fonts[$random];
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// Set the font size
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$font_size = 16;
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if (@$_GET['fontsize']) {
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$font_size = $_GET['fontsize'];
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}
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// Create the image
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$size = $this->image_size($font_size, 0, $font, $text);
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$width = $size[2] + $size[0] + 8;
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$height = abs($size[1]) + abs($size[7]);
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//$width = 100;
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//$height = 40;
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// Set the image size
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$image = imagecreate($width, $height);
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// Create some colors
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$white = imagecolorallocate($image, 255, 255, 255);
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$black = imagecolorallocate($image, 0, 0, 0);
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// Set the transparent color
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imagecolortransparent($image, $white);
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// Add the text
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imagefttext($image, $font_size, 0, 0, abs($size[5]), $black, $font, $text);
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// Set the content-type
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//header("Content-type: image/png");
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//imagepng($image));
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ob_start();
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imagepng($image);
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$image_buffer = ob_get_clean();
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//echo "<img src=\"data:image/png;base64, ".base64_encode($image_buffer)."\" />\n";
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imagedestroy($image);
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return $image_buffer;
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}
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/**
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* Calculates the bounding box of a text in an image.
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*
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* @param int $size The size of the font.
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* @param float $angle The angle of rotation.
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* @param string $font The path to the font file.
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* @param string $text The text to be rendered.
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*
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* @return array An array containing the bounding box coordinates (x, y, w, h).
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*/
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private function image_size($size, $angle, $font, $text) {
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$dummy = imagecreate(1, 1);
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$black = imagecolorallocate($dummy, 0, 0, 0);
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$bbox = imagettftext($dummy, $size, $angle, 0, 0, $black, $font, $text);
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imagedestroy($dummy);
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return $bbox;
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}
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}
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/*
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$captcha = new captcha;
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$captcha->code = 'abcdefg';
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$image_base64 = $captcha->base64();
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echo "<img src=\"data:image/png;base64, ".$image_base64."\" />\n";
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*/
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