PHP实现的下载远程图片自定义函数分享_PHP

WBOY
Release: 2016-05-31 13:17:44
Original
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代码如下:


/**
 * PHP下载远程图片到本地
 *
 * @param $url string 远程文件地址
 * @param $filename string 保存后的文件名(为空时则为随机生成的文件名,否则为原文件名)
 * @param $fileType array 允许的文件类型
 * @param $dirName string 文件保存的路径(路径其余部分根据时间系统自动生成)
 * @param $type int 远程获取文件的方式
 * @return json 返回文件名、文件的保存路径
 * @author blog.snsgou.com
 */
function getImage($url, $fileName = '', $dirName, $fileType = array('jpg', 'gif'), $type = 1)
{
 if ($url == '')
 {
  return false;
 }

 // 获取文件原文件名
 $defaultFileName = basename($url);

 // 获取文件类型
 $suffix = substr(strrchr($url, '.'), 1);
 if (!in_array($suffix, $fileType))
 {
  return false;
 }

 // 设置保存后的文件名
 $fileName = $fileName == '' ? time() . rand(0, 9) . '.' . $suffix : $defaultFileName;

 // 获取远程文件资源
 if ($type)
 {
  $ch = curl_init();
  $timeout = 15; // 超时时间
  curl_setopt($ch, CURLOPT_URL, $url);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
  $file = curl_exec($ch);
  curl_close($ch);
 }
 else
 {
  ob_start();
  readfile($url);
  $file = ob_get_contents();
  ob_end_clean();
 }

 // 设置文件保存路径
 $dirName = $dirName . '/' . date('Y', time()) . '/' . date('m', time()) . '/' . date('d', time()) . '/';
 if (!file_exists($dirName))
 {
  mkdir($dirName, 0777, true);
 }

 // 保存文件
 $res = fopen($dirName . $fileName, 'a');
 fwrite($res, $file);
 fclose($res);

 return "{'fileName':$fileName, 'saveDir':$dirName}";
}


// 举例
// 返回:{'fileName':13668030896.jpg, 'saveDir':/www/test/img/2013/04/24

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