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private function CreateImage(){
$this->mCheckImage = @imagecreate ($this->mCheckImageWidth,$this->mCheckImageHeight); //去掉@符号看会不会报错
imagecolorallocate ($this->mCheckImage, 255, 255, 255);
return $this->mCheckImage;
}
<?php
if(!defined('IN_ROOT')) {
exit('Access Denied');
}
class CCheckCodeFile{
private $mCheckCodeNum = 4;//验证码位数
private $mCheckCode = ''; //产生的验证码
private $mCheckImage = ''; //验证码的图片
private $mDisturbColor = '';//干扰像素
private $mCheckImageWidth = '50'; //验证码的图片宽度
private $mCheckImageHeight = '20';//验证码的图片高度
/**
*
* @brief 输出头
*
*/
private function OutFileHeader(){
header("Content-type:image/png");
}
/**
*
* @brief 产生验证码
*
*/
private function CreateCheckCode(){
$srcstr="ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
$strs = "";
for($i=0;$i<4;$i++){
$strs.=$srcstr[mt_rand(0,35)];
}
$strs = strtoupper($strs);
$this->mCheckCode = $strs;
$_SESSION['code']=$this->mCheckCode;
//return $_SESSION['yzm'];
}
/**
*
* @brief 产生验证码图片
*
*/
private function CreateImage(){
$this->mCheckImage = @imagecreate ($this->mCheckImageWidth,$this->mCheckImageHeight);
imagecolorallocate ($this->mCheckImage, 255, 255, 255);
return $this->mCheckImage;
}
/**
*
* @brief 设置图片的干扰像素
*
*/
private function SetDisturbColor(){
for ($i=0;$i<=128;$i++){
$this->mDisturbColor = imagecolorallocate ($this->mCheckImage, rand(0,255), rand(0,255), rand(0,255));
imagesetpixel($this->mCheckImage,rand(2,128),rand(2,38),$this->mDisturbColor);
}
}
/**
*
* @brief 设置验证码图片的大小
*
* @param $width 宽
*
* @param $height 高
*
*/
public function SetCheckImageWH($width,$height){
if($width==''||$height=='')return false;
$this->mCheckImageWidth = $width;
$this->mCheckImageHeight = $height;
return true;
}
/**
*
* @brief 在验证码图片上逐个画上验证码
*
*/
private function WriteCheckCodeToImage(){
for ($i=0;$i<=$this->mCheckCodeNum;$i++){
$bg_color = imagecolorallocate ($this->mCheckImage, rand(0,255), rand(0,128), rand(0,255));
$x = floor($this->mCheckImageWidth/$this->mCheckCodeNum)*$i;
$y = rand(0,$this->mCheckImageHeight-15);
imagechar ($this->mCheckImage, 5, $x, $y, $this->mCheckCode[$i], $bg_color);
}
}
/**
*
* @brief 输出验证码图片
*
*/
public function OutCheckImage(){
$this ->OutFileHeader();
$this ->CreateCheckCode();
$this ->CreateImage();
$this ->SetDisturbColor();
$this ->WriteCheckCodeToImage();
imagepng($this->mCheckImage);
imagedestroy($this->mCheckImage);
}
}
?>