php获取文件大小的4种方法
- WBOYOriginal
- 2016-06-07 11:43:303156Durchsuche
在网上找了4种获取文件大小的方法 记录起来。。。。
方法一：header<?php <br />
get_headers($url,true); <br>
<br>
//返回结果 <br>
Array <br>
( <br>
[0] => HTTP/1.1 200 OK <br>
[Date] => Sat, 29 May 2004 12:28:14 GMT <br>
[Server] => Apache/1.3.27 (Unix) (Red-Hat/Linux) <br>
[Last-Modified] => Wed, 08 Jan 2003 23:11:55 GMT <br>
[ETag] => "3f80f-1b6-3e1cb03b" <br>
[Accept-Ranges] => bytes <br>
<strong>[Content-Length] => 438 </strong> <br>
[Connection] => close <br>
[Content-Type] => text/html <br>
) <br>
?>
方法二function getFileSize($url) <br>
{ <br>
$url = parse_url($url); <br>
if($fp = @fsockopen($url['host'],emptyempty($url['port'])?80:$url['port'],$error)) <br>
{ <br>
fputs($fp,"GET ".(emptyempty($url['path'])?'/':$url['path'])." HTTP/1.1\r\n"); <br>
fputs($fp,"Host:$url[host]\r\n\r\n"); <br>
while(!feof($fp)) <br>
{ <br>
$tmp = fgets($fp); <br>
if(trim($tmp) == '') <br>
{ <br>
break; <br>
} <br>
elseif(preg_match('/Content-Length:(.*)/si',$tmp,$arr)) <br>
{ <br>
return trim($arr[1]); <br>
} <br>
} <br>
return null; <br>
} <br>
else <br>
{ <br>
return null; <br>
} <br>
} 方法三：function remote_filesize($uri,$user='',$pw='') <br>
{ <br>
// start output buffering <br>
ob_start(); <br>
// initialize curl with given uri <br>
$ch = curl_init($uri); <br>
// make sure we get the header <br>
curl_setopt($ch, CURLOPT_HEADER, 1); <br>
// make it a http HEAD request <br>
curl_setopt($ch, CURLOPT_NOBODY, 1); <br>
// if auth is needed, do it here <br>
if (!emptyempty($user) && !emptyempty($pw)) <br>
{ <br>
$headers = array('Authorization: Basic ' . base64_encode($user.':'.$pw)); <br>
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers); <br>
} <br>
$okay = curl_exec($ch); <br>
curl_close($ch); <br>
// get the output buffer <br>
$head = ob_get_contents(); <br>
// clean the output buffer and return to previous <br>
// buffer settings <br>
ob_end_clean(); <br>
<br>
echo '<br>head-->'.$head.''; <br>
<br>
// gets you the numeric value from the Content-Length <br>
// field in the http header <br>
$regex = '/Content-Length:\s([0-9].+?)\s/'; <br>
$count = preg_match($regex, $head, $matches); <br>
<br>
// if there was a Content-Length field, its value <br>
// will now be in $matches[1] <br>
if (isset($matches[1])) <br>
{ <br>
$size = $matches[1]; <br>
} <br>
else <br>
{ <br>
$size = 'unknown'; <br>
} <br>
//$last=round($size/(1024*1024),3); <br>
//return $last.' MB'; <br>
return $size; <br>
} 方法四：$fCont = file_get_contents("http://www.weiyeying.cn/"); <br>
echo strlen($fCont)/1024;
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