A very practical PHP verification code class_PHP tutorial-PHP Tutorial-php.cn

A very practical PHP verification code class_PHP tutorial

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Release： 2016-07-13 17:10:17

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A more practical PHP graphic verification code generation class, the calling method is also very simple, friends in need can refer to it.

The code is as follows

代码如下

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class ImageCode{
private $width;//验证码图片宽度
private $height;//验证码图片高度
private $codeNum;//验证码字符个数
private $checkCode;//验证码字符
private $image;//验证码画布
function __construct($width=60,$height=20,$codeNum=4){
$this->width=$width;
  $this->height=$height;
  $this->codeNum=$codeNum;
  $this->checkCode=$this->createCheckCode();
}

function getcreateImage(){
  $this->getcreateImage();
  $this->outputText();
  $this->setDisturbColor();
  $this->outputImage();
}
function getCheckCode(){
  return $this->checkCode;
}

private function getCreateImage(){
  $this->image=imagecreatetruecolor($this->width,$this->height);
  $black=imagecolorallocate($this->image,255,255,255,0);
  $border=imagecolorallocate($this->image,255,255,255,255);
  imagefilledrectangle($this->image,0,0,$this->width-1,$this->height-1,$border);
}

private function createCheckCode(){
  for($i=0;$i<$this->codeNum;$i){
   $number=rand(0,2);
   switch($number){
    case 0:
     $rand_number=rand(48,57);//数字
     break;
    case 1:
     $rand_number=rand(65,90);//大写字母
     break;
    case 2:
     $rand_number=rand(97,122);
     break;
   }
   $asc=sprintf("%c",$rand_number);
   $asc_number=$asc_number.$asc;
  }
  return $asc_number;
}

private function setDisturbColor(){
  for($i=0;$i<=100;$i++){
$color=imagecolorallocate($this->image,255,255,255);
   imagesetpixel($this->image,rand(1,$this->width-2),rand(1,$this->height-2),$color);
  }
}

private function outputImage(){
  if(imagetypes()&IMG_GIF){
   header("Content_type:image/gif");
   imagegif($this->image);
  }elseif(imagetypes()&IMG_JGP){
   header("Content_type:image/jpeg");
   imagejpeg($this->image,"",0.5);
  }else{
   die("PHP不支持图像创建");
  }
}

function __destruct(){
imagedestroy($this->image);
}
}

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class ImageCode{
private $width;//Verification code image width
private $height;//Verification code image height
private $codeNum;//The number of characters in the verification code
private $checkCode;//Verification code characters
private $image;//Verification code canvas
function __construct($width=60,$height=20,$codeNum=4){
$this->width=$width;
$this->height=$height;
$this->codeNum=$codeNum;
$this->checkCode=$this->createCheckCode();
}

function getcreateImage(){
$this->getcreateImage();
$this->outputText();
$this->setDisturbColor();
$this->outputImage();
}
function getCheckCode(){
Return $this->checkCode;
}

private function getCreateImage(){
$this->image=imagecreatetruecolor($this->width,$this->height);
$black=imagecolorallocate($this->image,255,255,255,0);
$border=imagecolorallocate($this->image,255,255,255,255);
imagefilledrectangle($this->image,0,0,$this->width-1,$this->height-1,$border);
}

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