PHP实现的下载远程图片自定义函数分享_php技巧
/**
* 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/}
echo getImage('http://img.wan.renren.com/images/2013/0430/1367294093164.jpg', '', 'd:/PHP/data', array('jpg', 'gif'), 1);

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