PHP实现下载图片的通用方法
时间：2021-07-01 10:21:17
帮助过：25人阅读
- function getPicture($url,$pictureName){
- if ($url == "") return false;
- //获取图片的扩展名
- $info = getimagesize($url);
- $mime = $info['mime'];
- $type = substr(strrchr($mime,'/'), 1);
- //不同的图片类型选择不同的图片生成和保存函数
- switch($type){
- case 'jpeg':
- $img_create_func = 'imagecreatefromjpeg';
- $img_save_func = 'imagejpeg';
- $new_img_ext = 'jpg';
- break;
- case 'png':
- $img_create_func = 'imagecreatefrompng';
- $img_save_func = 'imagepng';
- $new_img_ext = 'png';
- break;
- case 'bmp':
- $img_create_func = 'imagecreatefrombmp';
- $img_save_func = 'imagebmp';
- $new_img_ext = 'bmp';
- break;
- case 'gif':
- $img_create_func = 'imagecreatefromgif';
- $img_save_func = 'imagegif';
- $new_img_ext = 'gif';
- break;
- case 'vnd.wap.wbmp':
- $img_create_func = 'imagecreatefromwbmp';
- $img_save_func = 'imagewbmp';
- $new_img_ext = 'bmp';
- break;
- case 'xbm':
- $img_create_func = 'imagecreatefromxbm';
- $img_save_func = 'imagexbm';
- $new_img_ext = 'xbm';
- break;
- default:
- $img_create_func = 'imagecreatefromjpeg';
- $img_save_func = 'imagejpeg';
- $new_img_ext = 'jpg';
- }
- if ($pictureName == ""){
- $pictureName = time().".{$new_img_ext}";
- }else{
- $pictureName = $pictureName.".{$new_img_ext}";
- }
- $src_im = $img_create_func($url); //由url创建新图片
- $img_save_func($src_im, $pictureName); //输出文件到文件
- return $pictureName;
- }
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下载图片, PHP
