PHP獲取驗證碼圖片到本地,支持png、gif、jpg三種格式的驗證碼。在實現時,PHP判斷圖片格式是使用的php內置的exif_imagetype函數,確實比較方便,學習PHP的不妨可參考下本代碼:
view sourceprint?01
02header("Content-type:image/png");
03set_time_limit(0);//設置超時時間
04$url = $_GET['url'];
05$url = "http://vcer.baidu.com/verify";
06if(empty($url)){
07 echo "沒有圖片";
08 die;
09}
10$imginfo = GetImageSize ( $url );
11$type = exif_imagetype($url);
12$imgw = $imginfo [0];
13$imgh = $imginfo [1];
14$bg = imagecreatetruecolor($imgw,$imgh);
15if($type==IMAGETYPE_GIF){
16 $image = imagecreatefromgif($url);
17}elseif($type==IMAGETYPE_JPEG){
18 $image = imagecreatefromjpeg($url);
19}elseif($type==IMAGETYPE_PNG){
20 $image = imagecreatefrompng($url);
21}
22imagecolorallocate($image,255,255,255);
23imagecopy($bg,$image,0,0, 0,0,$imgw,$imgh);
24imagedestroy($image);
25ImagePng($bg);
26?>