File: /www/sites/cbgdh_com/index/wp-content/themes/onenav/inc/classes/CaptchaBuilder.php
<?php
/**
* Created by PhpStorm.
* User: lifeilin
* Date: 2017/1/11 0011
* Time: 10:19
*/
class CaptchaBuilder
{
/**
* @var resource 验证码图片
*/
protected $image;
/**
* @var string 验证码文字
*/
protected $text ;
/**
* @var string 随机字符
*/
protected $characters = '2346789abcdefghjmnpqrtuxyzABCDEFGHJMNPQRTUXYZ';
/**
* @var int 图片宽度
*/
protected $width = 120;
/**
* @var int 图片高度
*/
protected $height = 40;
private $fonts = [];
/**
* @var int 验证码字符的个数
*/
private $number = 4;
/**
* @var int 字体大小
*/
private $fontSize = 24;
/**
* @var string 验证码字体
*/
private $textFont;
private $noiseLevel = 30;
private $backColor;
/**
* @var bool 是否添加干扰线
*/
private $isDrawLine = false;
/**
* @var bool 是否启用曲线
*/
private $isDrawCurve = true;
/**
* @var bool 是否启用背景噪音
*/
private $isDrawNoise = true;
public function __construct()
{
setlocale(LC_ALL, 'zh_CN.UTF-8');
$this->initialize([]);
}
public function initialize(array $config){
isset($config['width']) && $this->width = $config['width'] ;
$this->height = isset($config['height']) ? $config['height'] : 40;
$this->number = isset($config['number']) ? $config['number'] : 4;
$this->fontSize = intval($this->width / floatval($this->number*1.25));
isset($config['line']) && $this->isDrawLine = boolval($config['line']);
isset($config['curve']) && $this->isDrawCurve = boolval($config['curve']);
isset($config['noise']) && $this->isDrawNoise = boolval($config['noise']);
if(isset($config['fonts']) && empty($config['fonts']) === false){
$this->fonts = $config['fonts'];
}else {
$fontDir = get_theme_file_path('/assets/css/fonts/captcha/');//__DIR__ . '/fonts/';
$this->fonts = array_filter(array_slice(scandir($fontDir), 2), function ($file) use ($fontDir) {
return is_file($fontDir . $file) && strcasecmp(pathinfo($file, PATHINFO_EXTENSION), 'ttf') === 0;
});
if (empty($this->fonts) === false) {
foreach ($this->fonts as &$font) {
$font = $fontDir . $font;
}
unset($font);
}
}
$this->noiseLevel = $this->width*10 / $this->height;
}
public function create()
{
$this->image = imagecreate($this->width, $this->height);
list($red, $green, $blue) = $this->getLightColor();
$this->backColor = imagecolorallocate($this->image, $red, $green, $blue);
imagefill($this->image,0,0,$this->backColor);
if (empty($this->fonts)) {
throw new \Exception('字体不存在');
}
$this->textFont = $this->fonts[array_rand($this->fonts)];
$this->isDrawNoise && $this->drawNoise();
if($this->isDrawLine){
$square = $this->width * $this->height;
$effects = mt_rand($square/3000, $square/2000);
for ($e = 0; $e < $effects; $e++) {
$this->drawLine($this->image, $this->width, $this->height);
}
}
$this->isDrawCurve && $this->drawSineLine();
$codeNX = ( $this->width / ($this->number + 1)) ; // 验证码第N个字符的左边距
$code = [];
for ($i = 0; $i < $this->number; $i++) {
$code[$i] = $this->characters[mt_rand(0, strlen($this->characters) - 1)];
list($red, $green, $blue) = $this->getDeepColor();
$color = imagecolorallocate($this->image, $red, $green, $blue);
if($color === false){
$color = mt_rand(50,200);
}
imagettftext($this->image, $this->fontSize, mt_rand(-30, 30), intval($codeNX * ($i + .5)) + mt_rand(1, 5), intval($this->height / 1.4), $color, $this->textFont, $code[$i]);
}
$this->text = strtolower(implode('',$code));
return $this;
}
public function save($filename, $quality)
{
return imagepng($this->image,$filename,$quality);
}
public function output($quality = 1)
{
header('Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate');
header('Cache-Control: post-check=0, pre-check=0', false);
header('Pragma: no-cache');
header("content-type: image/png");
imagepng($this->image,null,$quality);
}
public function getText()
{
return $this->text;
}
public function destroy()
{
@imagedestroy($this->image);
}
public function __destruct()
{
$this->destroy();
}
private function getFontColor()
{
list($red, $green, $blue) = $this->getDeepColor();
return imagecolorallocate($this->image, $red, $green, $blue);
}
/**
* 画曲线
*/
protected function drawSineLine() {
$px = $py = 0;
// 曲线前部分
$A = mt_rand(1, $this->height/2); // 振幅
$b = mt_rand(-$this->height/4, $this->height/4); // Y轴方向偏移量
$f = mt_rand(-$this->height/4, $this->height/4); // X轴方向偏移量
$T = mt_rand($this->height, $this->width*2); // 周期
$w = (2* M_PI)/$T;
$px1 = 0; // 曲线横坐标起始位置
$px2 = mt_rand($this->width/2, $this->width * 0.8); // 曲线横坐标结束位置
$color = imagecolorallocate($this->image, mt_rand(1, 150), mt_rand(1, 150), mt_rand(1, 150));
for ($px=$px1; $px<=$px2; $px = $px + 1) {
if ($w!=0) {
$py = intval($A * sin($w*$px + $f)+ $b + $this->height/2); // y = Asin(ωx+φ) + b
$i = (int) ($this->fontSize/5);
while ($i > 0) {
imagesetpixel($this->image, $px + $i , $py + $i, $color); // 这里(while)循环画像素点比imagettftext和imagestring用字体大小一次画出（不用这while循环）性能要好很多
$i--;
}
}
}
// 曲线后部分
$A = mt_rand(1, $this->height/2); // 振幅
$f = mt_rand(-$this->height/4, $this->height/4); // X轴方向偏移量
$T = mt_rand($this->height, $this->width*2); // 周期
$w = (2* M_PI)/$T;
$b = $py - $A * sin($w*$px + $f) - $this->height/2;
$px1 = $px2;
$px2 = $this->width;
for ($px=$px1; $px<=$px2; $px=$px+ 1) {
if ($w!=0) {
$py = intval($A * sin($w*$px + $f)+ $b + $this->height/2); // y = Asin(ωx+φ) + b
$i = (int) ($this->fontSize/5);
while ($i > 0) {
imagesetpixel($this->image, $px + $i, $py + $i, $color);
$i--;
}
}
}
}
/**
* Draw lines over the image
*/
protected function drawLine($image, $width, $height, $tcol = null)
{
if ($tcol === null) {
$tcol = imagecolorallocate($image, mt_rand(100, 255), mt_rand(100, 255), mt_rand(100, 255));
}
if (mt_rand(0, 1)) { // Horizontal
$Xa = mt_rand(0, $width/2);
$Ya = mt_rand(0, $height);
$Xb = mt_rand($width/2, $width);
$Yb = mt_rand(0, $height);
} else { // Vertical
$Xa = mt_rand(0, $width);
$Ya = mt_rand(0, $height/2);
$Xb = mt_rand(0, $width);
$Yb = mt_rand($height/2, $height);
}
imagesetthickness($image, mt_rand(1, 3));
imageline($image, $Xa, $Ya, $Xb, $Yb, $tcol);
}
/**
* 画杂点
* 往图片上写不同颜色的字母或数字
*/
private function drawNoise() {
$codeSet = '2345678abcdefhijkmnpqrstuvwxyz';
for($i = 0; $i < $this->noiseLevel; $i++){
list($red,$green,$blue) = $this->getLightColor();
//杂点颜色
$noiseColor = imagecolorallocate($this->image, $red,$green,$blue);
for($j = 0; $j < 5; $j++) {
// 绘杂点
imagestring($this->image, 5, mt_rand(-10, $this->width), mt_rand(-10, $this->height), $codeSet[mt_rand(0, 29)], $noiseColor);
}
}
}
/**
* 获取随机浅色
* @return array
*/
private function getLightColor()
{
$colors[0] = 200 + mt_rand(1,55);
$colors[1] = 200 + mt_rand(1,55);
$colors[2] = 200 + mt_rand(1,55);
return $colors;
}
/**
* 获取随机颜色
* @return array
*/
private function getRandColor()
{
$red = mt_rand(1,254);
$green = mt_rand(1,254);
if($red + $green > 400){
$blue = 0;
}else{
$blue = 400 -$green - $red;
}
return [$red,$green,$blue];
}
/**
* 获取随机深色
* @return array
*/
private function getDeepColor()
{
list($red,$green,$blue) = $this->getRandColor();
$increase = 30 + mt_rand(1,254);
$red = min(255,abs($red - $increase));
$green = min(255,abs($green - $increase));
$blue = min(255,abs($blue - $increase));
return [$red,$green,$blue];
}
}