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890天前<?php |
/** |
* 验证码类 |
*/ |
class imgCreate { |
private $charset='abcdefghijklmnopqrstuvwxyzABCDEFGHIGKLMNOPQRSTUVWXYZ23456789';//随机因子 |
private $code=""; //验证码 |
private $codelen; //验证码长度 |
private $width; //宽度 |
private $height; //高度 |
private $img; //图形资源句柄 |
private $font='/font/simhei.ttf'; //指定字体 |
private $fontsize; //指定字体大小 |
|
//构造方法初始化 |
public function __construct($width='100',$height='30',$codelen='4',$fontsize='5') { |
$this->width=$width; |
$this->height=$height; |
$this->codelen=$codelen; |
$this->fontsize=$fontsize; |
} |
|
//生成随机码 |
private function crecteCode(){ |
$_len= strlen($this->charset)-1; |
for($i=0;$i<$this->codelen;$i++){ |
$this->code.=$this->charset[mt_rand(0, $_len)]; |
} |
return $this->code; |
} |
//生成背景 |
private function createBg(){ |
$this->img= imagecreatetruecolor($this->width, $this->height); |
$Bgcolor= imagecolorallocate($this->img, mt_rand(0, 150), mt_rand(50, 100), mt_rand(0, 150)); |
imagefill($this->img, 0, 0, $Bgcolor); |
} |
|
//生成文字 |
private function createFont(){ |
$fontcolor=imagecolorallocate($this->img, mt_rand(100, 200), mt_rand(100, 200), mt_rand(100, 200)); |
imagefttext ($this->img, $this->fontsize, mt_rand(-10,10), $this->width/6, $this->height/1.2, $fontcolor, $this->font, $this->crecteCode()); |
} |
|
//生成线条、雪花 |
private function createLine(){ |
for($i=0;$i<6;$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), $color); |
} |
for($i=0;$i<20;$i++){ |
$color= imagecolorallocate($this->img, mt_rand(150, 200), mt_rand(150, 200), mt_rand(150, 200)); |
imagestring($this->img, mt_rand(1, 5), mt_rand(0, $this->width), mt_rand(0, $this->height), '*', $color); |
} |
} |
|
//输出 |
private function outPut(){ |
header('Content-type:image/png'); |
imagepng($this->img); |
imagedestroy($this->img); |
} |
|
//对外生成 |
public function doimg(){ |
$this->createBg(); |
$this->createLine(); |
$this->createFont(); |
$this->outPut(); |
} |
|
//获取验证码 |
public function getCode(){ |
echo $this->crecteCode(); |
} |
} |
?> |
