A super easy PHP Framework for web development!
https://github.com/exacti/phacil-framework
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366 lines
14 KiB
366 lines
14 KiB
<?php
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/*
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* Copyright © 2021 ExacTI Technology Solutions. All rights reserved.
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* GPLv3 General License.
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* https://exacti.com.br
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* Phacil PHP Framework - https://github.com/exacti/phacil-framework
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*/
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namespace Phacil\Framework;
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class Captcha {
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protected $code;
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public $height = 40;
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public $width = 220;
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public $numChar = 8;
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protected $iscale = 0.9;
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protected $perturbation = 0.90;
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protected $noise_level = 1;
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protected $background = 'black';
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public $fonts = "/fonts/*/*.ttf";
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public $pos = 'ABCDEFGHJKLMNOPQRSTUWVXZ0123456789abcdefhijkmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUWVXZ0123456789';
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function __construct($width = NULL, $height = NULL, $numChar = 6, $background = 'black') {
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$this->fonts = __DIR__."/fonts/*/*.ttf";
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if(!extension_loaded('gd')){
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throw new \Exception("The captcha function requires GD extension on PHP!");
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}
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$this->numChar = $numChar;
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$this->background = $background;
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$pos = str_split($this->pos);
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for($i = 0; $i < $this->numChar; $i++) {
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$this->code[] = $pos[mt_rand(0, (count($pos) -1))];
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}
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$this->width = ($width != NULL) ? $width : $this->width;
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$this->height = ($height != NULL) ? $height : $this->height;
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}
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public function __help() {
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$helpTxt =
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array(
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"version" => "1.0",
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"Description" => "Captcha module.",
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"Use" => 'Declare new Captcha($width, $height, $numChar, $background) on a variable, use $variable->getCode() to obtain a plain text captcha code (prefer pass thos code to a SESSION) and return $variable->showImage(\'format\').',
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"Formats" => "bmp, jpg, png, wbmp and gif."
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);
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var_dump($helpTxt, true);
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}
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function getCode(){
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return implode("", $this->code);
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}
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function showImage($format = 'png') {
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$image = imagecreatetruecolor($this->width, $this->height);
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$width = imagesx($image);
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$height = imagesy($image);
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$black = imagecolorallocate($image, 33, 33, 33);
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$white = imagecolorallocate($image, 255, 255, 255);
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$red = imagecolorallocatealpha($image, 255, 0, 0, 50);
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$green = imagecolorallocatealpha($image, 0, 255, 0, 75);
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$blue = imagecolorallocatealpha($image, 0, 0, 255, 50);
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$orange = imagecolorallocatealpha($image, 255, 136, 0, 50);
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$yellow = imagecolorallocatealpha($image, 255, 255, 0, 50);
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$punyWhite = imagecolorallocatealpha($image, 255, 255, 255, 40);
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$varYellow = imagecolorallocatealpha($image, 255, 255, 0, mt_rand(30,100));
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$varBlue = imagecolorallocatealpha($image, 0, 0, 255, mt_rand(30,100));
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$varBlack = imagecolorallocatealpha($image, 33, 33, 33, mt_rand(85,95));
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$pureYellow = imagecolorallocate($image, 255, 255, 0);
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$pureGreen = imagecolorallocate($image, 0, 255, 0);
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$softGreen = imagecolorallocate($image, 153, 241, 197);
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$softBlue = imagecolorallocate($image, 180, 225, 245);
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$softpink = imagecolorallocate($image, 250, 165, 215);
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$pureRed = imagecolorallocate($image, 250, 0, 0);
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$strongGreen = imagecolorallocate($image, 95, 115, 75);
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$pureBlue = imagecolorallocate($image, 0, 0, 215);
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$pureorange = imagecolorallocate($image, 255, 135, 0);
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$strangePurple = imagecolorallocate($image, 0, 80, 90);
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/*$pureBlue = imagecolorallocate($image, 200, 100, 245);*/
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$this->gdlinecolor = $yellow;
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switch($this->background) {
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case 'black':
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$fontColors = array($white, $pureYellow, $pureGreen, $softBlue, $softGreen, $softpink);
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imagefilledrectangle($image, 0, 0, $width, $height, $black);
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break;
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case 'white':
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$fontColors = array($black, $pureRed, $strongGreen, $pureBlue, $pureorange, $strangePurple);
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imagefilledrectangle($image, 0, 0, $width, $height, $white);
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break;
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}
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if(mt_rand(0,2) == 2) {
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imagefilledellipse($image, ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), 30, 30, $red);
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} else {
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imagefilledrectangle($image, ceil(mt_rand(5, $this->width)), ceil(mt_rand(5, $this->height)), ceil(mt_rand(5, $this->width)), ceil(mt_rand(5, $this->height)), $red);
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}
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if(mt_rand(1,2) == 2) {
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imagefilledellipse($image, ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), 30, 30, $green);
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} else {
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imagefilledrectangle($image, ceil(mt_rand(5, 145)), ceil(mt_rand(0, 35)), ceil(mt_rand(5, 175)), ceil(mt_rand(0, 40)), $green);
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}
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if(mt_rand(1,2) == 2) {
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imagefilledellipse($image, ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), 30, 30, $varBlue);
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} else {
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imagefilledrectangle($image, ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), $varBlue);
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}
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/*if(mt_rand(1,2) == 2) {
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imagefilledellipse($image, ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), 30, 30, $orange);
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} else {
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imagefilledrectangle($image, ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), $orange);
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}*/
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if(mt_rand(1,2) == 2) {
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imagefilledellipse($image, ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), 30, 30, $yellow);
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} else {
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imagefilledrectangle($image, ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), $yellow);
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}
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imagefilledrectangle($image, 0, 0, $width, 0, $black);
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imagefilledrectangle($image, $width - 1, 0, $width - 1, $height - 1, $black);
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imagefilledrectangle($image, 0, 0, 0, $height - 1, $black);
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imagefilledrectangle($image, 0, $height - 1, $width, $height - 1, $black);
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$this->ttfFonts = glob($this->fonts);
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$space = ($this->width - 10) / $this->numChar;
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foreach($this->code as $key => $character) {
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//$qualfonte = __DIR__."/gd_fonts/".mt_rand(0,8).".gdf";
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$qualfonte = mt_rand(0, (count($this->ttfFonts)-1));
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$fonteCaptcha = $this->ttfFonts[$key];
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$tamanhoFonte = mt_rand(16, 26);
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//Carregar uma nova fonte
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//$fonteCaptcha = imageloadfont($qualfonte);
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$y = ceil(mt_rand(($tamanhoFonte+5), $this->height-5 ));
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$divisor = 1;
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$plus = 10;
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$incre = 0;
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//$securityX = (isset($x)) ? $x + 18 : 0;
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switch ($key) {
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case "0":
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$x = ceil(mt_rand(0, $space-$plus));
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break;
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case "1":
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$x = ceil(mt_rand($x+$incre/$divisor+$plus, $space*2));
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break;
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case "2":
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$x = ceil(mt_rand($x+$incre/$divisor+$plus, $space*3));
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break;
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case "3":
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$x = ceil(mt_rand($x+$incre/$divisor+$plus, $space*4));
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break;
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case "4":
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$x = ceil(mt_rand($x+$incre/$divisor+$plus, $space*5));
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break;
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case "5":
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$x = ceil(mt_rand($x+$incre/$divisor+$plus, $space*5+$space/2));
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break;
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default:
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$x = ceil(mt_rand($x+$incre/$divisor+$plus, $space*$key+$space/2));
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break;
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}
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if(isset($securityX) && $x < $securityX) {
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$x = $securityX;
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}
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$rotate = mt_rand(-20, 35);
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//imagechar ( $image , $fonteCaptcha , $x , $y, $character , $fontColors[mt_rand(0,count($fontColors)-1)]);
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$dadosChar = imagettftext ( $image , $tamanhoFonte, $rotate , $x , $y , $fontColors[mt_rand(0,count($fontColors)-1)], $fonteCaptcha , $character );
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if(mt_rand(0, 5) == 1)
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$dadosChar = imagettftext ( $image , $tamanhoFonte, $rotate , $x+1 , $y+1 , $fontColors[mt_rand(0,count($fontColors)-1)], $fonteCaptcha , $character );
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$securityX = max([$dadosChar[2], $dadosChar[4]]);
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}
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$image = $this->drawNoise($image);
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//imagefilter($image, IMG_FILTER_PIXELATE, 2,1);
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//exit;
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if(mt_rand(1,2) == 2) {
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imageellipse($image, ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), 30, 30, $red);
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} else {
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imagerectangle($image, ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), $red);
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}
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if(mt_rand(1,2) == 2) {
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imageellipse($image, ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), 30, 30, $green);
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} else {
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imageline($image, ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), $green);
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}
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if(mt_rand(1,2) == 2) {
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imageellipse($image, ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), 30, 30, $blue);
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} else {
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imagerectangle($image, ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), $blue);
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}
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if(mt_rand(1,2) == 2) {
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imageellipse($image, ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), 30, 30, $orange);
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} else {
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imageline($image, ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), $orange);
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}
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if(mt_rand(1,2) == 2) {
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imageellipse($image, ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), 30, 30, $varYellow);
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} else {
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imageline($image, ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), $varYellow);
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}
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if(mt_rand(1,2) == 2) {
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imageellipse($image, ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), 30, 30, $punyWhite);
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} else {
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imageline($image, ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), $punyWhite);
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}
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if(mt_rand(1,2) == 2) {
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imagefilledellipse($image, ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), 30, 30, $varBlack);
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} else {
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imagefilledrectangle($image, ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), ceil(mt_rand(5, $this->width)), ceil(mt_rand(0, $this->height)), $varBlack);
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}
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//imagearc ( $image , ceil(mt_rand(5, $this->width)) , ceil(mt_rand(0, $this->height)) ,ceil(mt_rand(5, $this->width)) , ceil(mt_rand(0, $this->height)), ceil(mt_rand(5, $this->width))/ceil(mt_rand(5, $this->height)) , ceil(mt_rand(5, $this->height))/ceil(mt_rand(0, $this->width)) , $pureYellow );
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header('Cache-Control: no-cache');
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if($format == 'jpeg' || $format == 'jpg') {
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header('Content-type: image/jpeg');
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imagejpeg($image);
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} elseif ($format == 'png') {
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header('Content-type: image/png');
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imagepng($image);
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} elseif ($format == 'bmp' || $format == 'bitmap') {
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header('Content-type: image/bmp');
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imagebmp($image);
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} elseif ($format == 'gif' || $format == 'giff') {
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header('Content-type: image/gif');
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imagegif($image);
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} elseif ($format == 'wbmp') {
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header('Content-type: image/vnd.wap.wbmp');
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imagewbmp($image);
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}
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imagedestroy($image);
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}
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protected function drawNoise($im)
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{
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if ($this->noise_level > 10) {
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$noise_level = 10;
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} else {
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$noise_level = $this->noise_level;
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}
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$t0 = microtime(true);
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$noise_level *= M_LOG2E;
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for ($x = 1; $x < $this->width; $x += 20) {
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for ($y = 1; $y < $this->height; $y += 20) {
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for ($i = 0; $i < $noise_level; ++$i) {
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$x1 = mt_rand($x, $x + 20);
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$y1 = mt_rand($y, $y + 20);
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$size = mt_rand(1, 3);
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if ($x1 - $size <= 0 && $y1 - $size <= 0) continue; // dont cover 0,0 since it is used by imagedistortedcopy
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imagefilledarc($im, $x1, $y1, $size, $size, 0, mt_rand(180,360), $this->gdlinecolor, IMG_ARC_PIE);
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}
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}
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}
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$t = microtime(true) - $t0;
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return $im;
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/*
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// DEBUG
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imagestring($this->im, 5, 25, 30, "$t", $this->gdnoisecolor);
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header('content-type: image/png');
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imagepng($this->im);
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exit;
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*/
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}
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protected function distortedCopy($im, $im2)
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{
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$this->tmpimg = $im2;
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$this->im = $im;
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$numpoles = 3; // distortion factor
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$px = array(); // x coordinates of poles
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$py = array(); // y coordinates of poles
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$rad = array(); // radius of distortion from pole
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$amp = array(); // amplitude
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$x = ($this->width / 4); // lowest x coordinate of a pole
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$maxX = $this->width - $x; // maximum x coordinate of a pole
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$dx = mt_rand($x / 10, $x); // horizontal distance between poles
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$y = mt_rand(20, $this->height - 20); // random y coord
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$dy = mt_rand(20, $this->height * 0.7); // y distance
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$minY = 20; // minimum y coordinate
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$maxY = $this->height - 20; // maximum y cooddinate
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// make array of poles AKA attractor points
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for ($i = 0; $i < $numpoles; ++ $i) {
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$px[$i] = ($x + ($dx * $i)) % $maxX;
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$py[$i] = ($y + ($dy * $i)) % $maxY + $minY;
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$rad[$i] = mt_rand($this->height * 0.4, $this->height * 0.8);
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$tmp = ((- $this->frand()) * 0.15) - .15;
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$amp[$i] = $this->perturbation * $tmp;
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}
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$bgCol = imagecolorat($this->tmpimg, 0, 0);
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$width2 = $this->iscale * $this->width;
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$height2 = $this->iscale * $this->height;
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imagepalettecopy($this->im, $this->tmpimg); // copy palette to final image so text colors come across
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// loop over $img pixels, take pixels from $tmpimg with distortion field
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for ($ix = 0; $ix < $this->width; ++ $ix) {
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for ($iy = 0; $iy < $this->height; ++ $iy) {
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$x = $ix;
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$y = $iy;
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for ($i = 0; $i < $numpoles; ++ $i) {
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$dx = $ix - $px[$i];
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$dy = $iy - $py[$i];
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if ($dx == 0 && $dy == 0) {
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continue;
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}
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$r = sqrt($dx * $dx + $dy * $dy);
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if ($r > $rad[$i]) {
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continue;
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}
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$rscale = $amp[$i] * sin(3.14 * $r / $rad[$i]);
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$x += $dx * $rscale;
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$y += $dy * $rscale;
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}
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$c = $bgCol;
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$x *= $this->iscale;
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$y *= $this->iscale;
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if ($x >= 0 && $x < $width2 && $y >= 0 && $y < $height2) {
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$c = imagecolorat($this->tmpimg, $x, $y);
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}
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if ($c != $bgCol) { // only copy pixels of letters to preserve any background image
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imagesetpixel($this->im, $ix, $iy, $c);
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}
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}
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}
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return $this->im;
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}
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protected function frand()
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{
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return 0.0001 * mt_rand(0,9999);
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}
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}
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