<"__WEBROOT__")) define("__WEBROOT__",$_SERVER['DOCUMENT_ROOT']);
 
class Img {
  protected $_Img; //图片源
  protected $_FileImg; //加载的图片源
  protected $_FileInfo; //加载的图片的信息数组
  protected $_PicInfo; //加载的图片的宽高等信息数组
  protected $_Rand = 'abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNOPQRSTUVWXYZ1234567890'; //随机因子
  protected $_Code = ''; //验证码
  public $Width = 300;//图片默认宽
  public $Height = 80; //图片默认高
  public $BackgroundColor = "000000";
  public $Font = "/phps/Public/Font/ARIALNB.TTF"; //默认字体
  public $FontSize = 16; //默认字体字号
  public $FontColor = "ffffff"; //默认字体颜色
  public $Content = "Test Word";
  public $Align = "left";
  public $Codes = 4; //验证码个数
  public $Line = 6; //干扰线条的个数
  public $LoadErr = ''; //错误信息
 
  //public function __construct(){}
 
  /** 设置图片属性
   * @param array $Options 属性数组
   * @return $this 返回对象
   */
  public function Style($Options){
    $this -> _Re_Set();
    foreach($Options as $K=>$V){
      if(in_array($K,array('Width','Height','BackgroundColor','Font','FontSize','FontColor','Content','Align','Codes','Line','Snow'))){
        if($K == "BackgroundColor" || $K == "FontColor"){
          if(preg_match("#([a-zA-Z0-9]{6})#",$V)) $this -> $K = $V;
        }else{
          $this -> $K = $V;
        }
      }
    }
    return $this;
  }
 
  /**
   * 重置属性，不提供外部访问
   */
  protected function _Re_Set(){
    $this -> Width = 100;
    $this -> Height = 30;
    $this -> BackgroundColor = "000000";
    $this -> Font = "/phps/Public/Font/ARIALNB.TTF";
    $this -> FontSize = 16;
    $this -> FontColor = "ffffff";
    $this -> Align = "left";
    $this -> Codes =4;
    $this -> Line = 6;
  }
 
  /**
   * 创建图像源、添加背景、创建图像
   * @param bool $BGC 指定是否创建背景色及矩形块
   */
  protected function _Create_Img_GB($BGC = True){
    $this -> _Img = imagecreatetruecolor($this -> Width,$this -> Height); //创建背景源
    if($BGC){
      preg_match("#([a-zA-Z0-9]{2})([a-zA-Z0-9]{2})([a-zA-Z0-9]{2})#",$this -> BackgroundColor,$ColorArr); //将颜色值分隔成三组16位进制数
      $Color = imagecolorallocate($this -> _Img,hexdec($ColorArr[1]),hexdec($ColorArr[2]),hexdec($ColorArr[3])); //给Img图像源添加背景色
      imagefilledrectangle($this -> _Img,0,$this -> Height,$this -> Width,0,$Color); //创建图像
    }
  }
 
  /**
   * 创建随机验证码
   */
  protected function _Create_Code(){
    $Len = strlen($this -> _Rand) - 1;
    for($i = 0;$i < $this -> Codes;$i++){
      $this -> _Code .= $this -> _Rand[mt_rand(0,$Len)];
    }
  }
 
  /**
   * 向图像中写入字符串，暂不支持中文
   */
  protected function _Write_Text(){
    $FontWidth = imagefontwidth($this -> FontSize); //获取字号的一个字符的宽度
    preg_match_all('/(.)/us', $this -> Content, $TextArr); //将内容分隔成数组一遍统计个数
    $FontHeight = imagefontheight($this -> FontSize); //获取字号的高度
    $X = ceil(($this -> Width - ($FontWidth * count($TextArr[0]))) / 2); //设置X轴距左边距的距离
    $Y = ceil(($this -> Height + $FontHeight) / 2); //设置Y轴距上边距的距离
    preg_match("#([a-zA-Z0-9]{2})([a-zA-Z0-9]{2})([a-zA-Z0-9]{2})#",$this -> FontColor,$ColorArr);
    $Color = imagecolorallocate($this -> _Img,hexdec($ColorArr[1]),hexdec($ColorArr[2]),hexdec($ColorArr[3])); //设置文字颜色
    imagettftext($this -> _Img,$this -> FontSize,0,$X,$Y,$Color,__WEBROOT__.$this -> Font,$this -> Content); //写入内容
  }
 
  /**
   * 向图像中写入验证码
   */
  protected function _Write_Code(){
    $_X = $this -> Width / $this -> Codes; //设置宽高比
    for($i = 0;$i < $this -> Codes;$i++){ //循环Codes次，每次生成一位验证码值
      $Color = imagecolorallocate($this -> _Img,mt_rand(0,156),mt_rand(0,156),mt_rand(0,156)); //随机生成验证码值的颜色
      imagettftext($this -> _Img,$this -> FontSize,mt_rand(-30,30),$_X*$i+mt_rand(1,5),$this -> Height / 1.3,$Color,__WEBROOT__.$this -> Font,$this -> _Code[$i]); //生成一位验证码值
    }
  }
 
  /**
   * 向图像中写入干扰线条
   */
  protected function _Write_Line() { //生成干扰线条
    for ($i=0;$i < $this -> Line;$i++) {
      $Color = imagecolorallocate($this -> _Img,mt_rand(0,156),mt_rand(0,156),mt_rand(0,156));
      imageline($this -> _Img,mt_rand(0,$this -> Width),mt_rand(0,$this -> Height),mt_rand(0,$this -> Width),mt_rand(0,$this -> Height),$Color);
    }
  }
 
  /**
   * 设置图像类型为JPEG
   */
  protected function _Img_Jpeg(){
    header('Content-type:image/jpeg');
    imagejpeg($this -> _Img);
    imagedestroy($this -> _Img);
  }
 
  /**
   * 设置图像类型为PNG
   */
  protected function _Img_Png(){
    header('Content-type:image/png');
    imagepng($this -> _Img);
    imagedestroy($this -> _Img);
  }
 
  /**
   * 创建JPEG的字符串图像
   */
  public function Create_Img_Jpg(){
    $this -> _Create_Img_GB(True);
    $this -> _Write_Text();
    $this -> _Img_Jpeg();
  }
 
  /**
   * 创建PNG的字符串图像
   */
  public function Create_Img_Png(){
    $this -> _Create_Img_GB(True);
    $this -> _Write_Text();
    $this -> _Img_Png();
  }
 
  /**
   * 创建验证码的PNG图像
   */
  public function Create_Verify(){
    $this -> BackgroundColor = '';
    for($I = 0;$I < 3;$I++){
      $this -> BackgroundColor .= dechex(mt_rand(20,155));
    }
    $this -> _Create_Img_GB(True);
    $this -> _Create_Code();
    $this -> _Write_Line();
    $this -> _Write_Code();
    $this -> _Img_Png();
  }
 
  /**
   * 外部获取MD5加密后的验证码
   * @return string
   */
  public function Get_Verify(){
    return md5($this -> _Code);
  }
 
  /**
   * 加载一个图像文件，并获取图像相关信息
   * @param string $FilePath 图像相对路径地址
   * @return $this|bool 成功返回对象，否则返回FALSE
   */
  public function Load_Img($FilePath){
    $FilePath = __WEBROOT__.$FilePath;
    if(!is_file($FilePath)){
      $this -> LoadErr = "路径错误，文件不存在";
      Return False;
    }
    $this -> _PicInfo = getimagesize($FilePath);
    $this -> _FileInfo = pathinfo($FilePath);
    switch($this -> _PicInfo[2]){
      case 1:$this ->_FileImg = imagecreatefromgif($FilePath);break;
      case 2:$this ->_FileImg = imagecreatefromjpeg($FilePath);break;
      case 3:$this ->_FileImg = imagecreatefrompng($FilePath);break;
      default:$this -> LoadErr = "类型错误，不支持的图片类型";Return False;
    }
    Return True;
  }
 
  /**
   * 创建缩略图
   * @param string $FileName 保存的图片名称前缀
   * @param string $FilePath 保存图片的相对路径
   * @return mixed 返回生成的图片的信息数组
   */
  public function Create_Thumb($FileName,$FilePath){
    $SavePath = __WEBROOT__.$FilePath;
    if(!file_exists($SavePath)){
      mkdir($SavePath,0777,true);
    }
    $FileName = $FileName.date("YmdHis").rand(100,999).'.'.$this -> _FileInfo['extension'];
    $FilePath = $FilePath.$FileName;
    $SavePath = $SavePath.$FileName;
    $this -> _Create_Img_GB(False);
    imagecopyresampled($this -> _Img,$this -> _FileImg,0,0,0,0,$this -> Width,$this -> Height,$this -> _PicInfo[0],$this -> _PicInfo[1]);
    switch($this -> _PicInfo[2]){
      case 1:imagegif($this -> _Img,$SavePath);break;
      case 2:imagejpeg($this -> _Img,$SavePath);break;
      case 3:imagepng($this -> _Img,$SavePath);break;
    }
    $FIleInfo['FileName'] = $FileName;
    $FIleInfo['FilePath'] = $FilePath;
    Return $FIleInfo;
  }
}

$Img = new Img();
 
$Options['Width'] = 300;
$Options['Height'] = 100;
$Options['Content'] = "Test Create Img";
$Options['FontColor'] = "FF0000";
$Options['BackgroundColor'] = "AAAAAA";
$Img -> Style($Options) -> Create_Img_Jpg();
 
if($Img -> Load_Img("/Public/images/ad1.png")){
  $FileInfo = $Img -> Style(array('Width'=>30,'Height'=>30)) -> Create_Thumb("Thumb","/Uploads/images/");
  var_dump($FileInfo);
}else{
  die("加载图像失败,".$Img -> LoadErr);
}