本文是一个php获取远程图片大小的示例代码,感兴趣的同学参考下. 有时候,我们需要知道远程图片的体积大小,那么PHP如何可以做到呢? 示例代码: //用法 echo remote_filesize($url,$user='',$pw=''); $url = "http://www.aa.com/librarys/images/random/rand_11.jpg";//这里要换成你的图片地址 echo remote_filesize($url,$user='',$pw=''); function remote_filesize($uri,$user='',$pw='') { // start output buffering ob_start(); // initialize curl with given uri $ch = curl_init($u
本文是一个php获取远程图片大小的示例代码,感兴趣的同学参考下.
有时候,我们需要知道远程图片的体积大小,那么PHP如何可以做到呢?
示例代码:
//用法 echo remote_filesize($url,$user='',$pw='');
$url = "http://www.aa.com/librarys/images/random/rand_11.jpg";//这里要换成你的图片地址
echo remote_filesize($url,$user='',$pw='');
function remote_filesize($uri,$user='',$pw='')
{
// start output buffering
ob_start();
// initialize curl with given uri
$ch = curl_init($uri); // make sure we get the header
curl_setopt($ch, CURLOPT_HEADER, 1); // make it a http HEAD request
curl_setopt($ch, CURLOPT_NOBODY, 1); // if auth is needed, do it here
if (!empty($user) && !empty($pw))
{
$headers = array('Authorization: Basic ' . base64_encode($user.':'.$pw));
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
}
$okay = curl_exec($ch);
curl_close($ch); // get the output buffer
$head = ob_get_contents(); // clean the output buffer and return to previous // buffer settings
ob_end_clean(); // gets you the numeric value from the Content-Length // field in the http header
$regex = '/Content-Length:s([0-9].+?)s/';
$count = preg_match($regex, $head, $matches); // if there was a Content-Length field, its value // will now be in $matches[1]
if (isset($matches[1]))
{
$size = $matches[1];
}
else
{
$size = 'unknown';
}
$last_mb = round($size/(1024*1024),3);
$last_kb = round($size/1024,3);
return $last_kb . 'KB / ' . $last_mb.' MB';
}
函数的思路是,先CURL获取图片到缓冲区,然后正则获取图片的Content-Length信息就OK了。
声明:本文内容来源自网络,文字、图片等素材版权属于原作者,平台转载素材出于传递更多信息,文章内容仅供参考与学习,切勿作为商业目的使用。如果侵害了您的合法权益,请您及时与我们联系,我们会在第一时间进行处理!我们尊重版权,也致力于保护版权,站搜网感谢您的分享!