Very practical php verification code class, very practical php verification code

The examples in this article share the php verification code class for your reference, the specific content is as follows

<&#63;php 
/** 
 * 
 * @author Administrator 
 * 
 */ 
class ValidateCode{ 
   
  private $width; 
  private $height; 
  private $codeNum; 
  private $img_resouce; 
  private $disturbColorNum; 
  private $checkCode; 
   
  function __construct($width=80,$height=20,$codeNum=4) { 
    $this->width=$width; 
    $this->height=$height; 
    $this->codeNum=$codeNum; 
    $this->checkCode=$this->CreateCheckCode(); 
    $number=floor($width*$height/25); 
    if ($number>240-$codeNum) { 
      $this->disturbColorNum=240-$codeNum; 
    }else{ 
      $this->disturbColorNum=$number; 
    } 
  } 
   
  public function showImage($fontpath='') { 
    //創(chuàng)建圖像背景 
    $this->Img_resouce(); 
    //var_dump($img_resouce); 
    //設(shè)置干擾元素 
    $this->setDistructcolor(); 
    //向圖像中隨機(jī)畫出文本 
    $this->outputtext($fontpath); 
    //輸出圖像 
    $this->outputimage(); 
  } 
  /** 
   * 
   *獲取隨機(jī)創(chuàng)建的驗(yàn)證碼 
   */ 
  public function getCheckCode(){ 
     
  } 
  private function Img_resouce(){ 
    //創(chuàng)建一個(gè)真彩圖像 
    $this->img_resouce=imagecreatetruecolor($this->width,$this->height); 
    //隨機(jī)設(shè)置圖像背景 
    $backcolor=imagecolorallocate($this->img_resouce,rand(225,255),rand(225,255),rand(225,255)); 
    //填充顏色 
    imagefill($this->img_resouce, 0, 0, $backcolor); 
    //設(shè)置邊框背景 
    $border=imagecolorallocate($this->img_resouce, 0,0,0); 
    //畫一個(gè)矩形 
    imagerectangle($this->img_resouce,0,0,$this->width-1,$this->height-1,$border); 
  } 
  private function setDistructcolor(){ 
    //繪畫干擾點(diǎn) 
    for ($i = 0; $i <$this->disturbColorNum; $i++) { 
       
      imagesetpixel($this->img_resouce, rand(1, $this->width-2), rand(1, $this->height-2), rand(0,255)); 
    } 
     
    //繪畫干擾線 
    for ($j = 0; $j <3; $j++) { 
      $linecolor=imagecolorallocate($this->img_resouce,rand(0,255),rand(0,255),rand(0,255)); 
      imagearc($this->img_resouce, rand(0,$this->width), rand(0,$this->height), 
       rand(10, 225), rand(20, 150), 
       55, 44, $linecolor); 
    } 
  } 
  private function CreateCheckCode(){ 
    $code='23456789abcdefghijkmnpqrstuvwxyzABCDEFGHIJKMNPQRSTUVWXYZ'; 
    $string=''; 
    for ($i = 0; $i < $this->codeNum; $i++) { 
       
      $char=$code{rand(0, strlen($code)-1)}; 
      $string.=$char; 
    } 
    return $string; 
  } 
  private function outputtext($fontpath=''){ 
    for ($i = 0; $i < $this->codeNum; $i++) { 
      $fontcolor=imagecolorallocate($this->img_resouce, rand(0,128), rand(0, 128), rand(0, 128)); 
      if ($fontpath=='') { 
         
         $fontsize=rand(3, 5); 
         $x=floor($this->width/$this->codeNum)*$i+3; 
         $y=rand(0, $this->height-20); 
         imagechar($this->img_resouce, $fontsize, $x, $y, $this->checkCode{$i}, $fontcolor); 
    }else{ 
         $fontsize=rand(12, 16); 
         $x=floor(($this->width-8)/$this->codeNum)*$i+8; 
         $y=rand($fontsize, $this->height-15); 
         imagettftext($this->img_resouce,$fontsize,rand(-45,45),$x,$y,$fontcolor,fontpath,$this->checkCode{$i}); 
       } 
    } 
  } 
  private function outputimage() { 
     
    if (imagetypes() & IMG_GIF) { 
      header("Content-type: image/gif"); 
      imagegif($this->img_resouce); 
    }else if(imagetypes() & IMG_JPEG) { 
      header("Content-type: image/jpeg"); 
      imagejpeg($this->img_resouce); 
    }else if(imagetypes() & IMG_PNG) { 
      header("Content-type: image/png"); 
      imagepng($this->img_resouce); 
    }else { 
      echo "PHP不支持的類型"; 
    } 
     
     
  } 
  private function __destruct(){ 
     
    imagedestroy($this->img_resouce); 
  } 
} 
&#63;>

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