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简单的php 验证图片生成函数

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Release: 2016-06-13 12:24:00
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复制代码 代码如下:


function yzm($name,$width,$height){
Header("Content-type: image/PNG");
srand((double)microtime()*1000000);//播下一个生成随机数字的种子,以方便下面随机数生成的使用
session_start();//将随机数存入session中
$_SESSION[$name]="";
$im = imagecreate($width,$height); //制定图片背景大小
$black = ImageColorAllocate($im, 0,0,0); //设定三种颜色
$white = ImageColorAllocate($im, 255,255,255);
$gray = ImageColorAllocate($im, 200,200,200);
imagefill($im,0,0,$gray); //采用区域填充法,设定(0,0)
while(($authnum=rand()%100000)$_SESSION[$name]=$authnum;
imagestring($im, 5, 10, 3, $authnum, $black);
for($i=0;$i{
$randcolor = ImageColorallocate($im,rand(0,255),rand(0,255),rand(0,255));
imagesetpixel($im, rand()%70 , rand()%30 , $randcolor);
}
ImagePNG($im);
ImageDestroy($im);
}?>


使用方法,将其建立一个php文件入yzm.php,调用简单的php 验证图片生成函数
将参数调用到本函数中即可。
source:php.cn
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