php生成验证码图片学习笔记
这里是自己的学习时的验证码图形生成的学习笔记,后来经过自己的深入学习,可以获取远程的图片到本地,不过这里需要php gd库开启,代码如下:
- header("Content-type:image/png");
- set_time_limit(0);//设置PHP超时时间
- $url = $_GET['url'];
- $url = "http://vcer.baidu.com/verify";
- $imginfo = GetImageSize ( $url );
- $imgw = $imginfo [0];
- $imgh = $imginfo [1];
- $bg = imagecreatetruecolor($imgw,$imgh);
- $image = imagecreatefromjpeg($url);
- imagecolorallocate($image,255,255,255);
- imagecopy($bg,$image,0,0, 0,0,$imgw,$imgh);
- imagedestroy($image);
- ImagePng($bg);//开源代码phpfensi.com
php获取远程验证码到本地,代码如下:
- header("Content-type:image/png");
- set_time_limit(0);//设置PHP超时时间
- $url = $_GET['url'];
- $url = "http://vcer.baidu.com/verify";
- if(emptyempty($url)){
- echo "没有图片";
- die;
- }
- $imginfo = GetImageSize ( $url );
- $type = exif_imagetype($url);
- $imgw = $imginfo [0];
- $imgh = $imginfo [1];
- $bg = imagecreatetruecolor($imgw,$imgh);
- if($type==IMAGETYPE_GIF){
- $image = imagecreatefromgif($url);
- }elseif($type==IMAGETYPE_JPEG){
- $image = imagecreatefromjpeg($url);
- }elseif($type==IMAGETYPE_PNG){
- $image = imagecreatefrompng($url);
- }
- imagecolorallocate($image,255,255,255);
- imagecopy($bg,$image,0,0, 0,0,$imgw,$imgh);
- imagedestroy($image);
- ImagePng($bg);