1、fsockopen
| 代码如下 | 复制代码 |
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<?php function getFileSize($url){ $url = parse_url($url); if($fp = @fsockopen($url['host'],empty($url['port'])?80:$url['port'],$error)){ fputs($fp,"GET ".(empty($url['path'])?'/':$url['path'])." HTTP/1.1rn"); fputs($fp,"Host:$url[host]rnrn"); while(!feof($fp)){ $tmp = fgets($fp); if(trim($tmp) == ''){ break; }else if(preg_match('/Content-Length:(.*)/si',$tmp,$arr)){ return trim($arr[1]); } } return null; }else{ return null; } } //调用方法 echo getFileSize("http://www.111cn.netnet/") ?> |
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2、使用file_get_contents()
| 代码如下 | 复制代码 |
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<?php $file = file_get_contents($url); echo strlen($file); ?> |
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3. 使用get_headers()
| 代码如下 | 复制代码 |
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<?php $header_array = get_headers($url, true); //返回结果 $size = $header_array['Content-Length']; |
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4.curl
| 代码如下 | 复制代码 |
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function remote_filesize($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 (!emptyempty($user) && !emptyempty($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 $head = ob_get_contents(); // clean the output buffer and return to previous // buffer settings ob_end_clean(); echo '<br>head-->'.$head.'<----end <br>'; // 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=round($size/(1024*1024),3); //return $last.' MB'; return $size; } |
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时间： 2024-11-03 11:32:51