Question

在php中是否有办法检查服务器上的远程文件大小和日期/时间？

Answer 1

尝试约会

function GetRemoteLastModified( $uri )
{
    // default
    $unixtime = 0;

    $fp = fopen( $uri, "r" );
    if( !$fp ) {return;}

    $MetaData = stream_get_meta_data( $fp );

    foreach( $MetaData['wrapper_data'] as $response )
    {
        // case: redirection
        if( substr( strtolower($response), 0, 10 ) == 'location: ' )
        {
            $newUri = substr( $response, 10 );
            fclose( $fp );
            return GetRemoteLastModified( $newUri );
        }
        // case: last-modified
        elseif( substr( strtolower($response), 0, 15 ) == 'last-modified: ' )
        {
            $unixtime = strtotime( substr($response, 15) );
            break;
        }
    }
    fclose( $fp );
    return $unixtime;
}

和文件大小

function remotefilesize($remoteFile){
$ch = curl_init($remoteFile);
curl_setopt($ch, CURLOPT_NOBODY, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true); //not necessary unless the file redirects (like the PHP example we're using here)
$data = curl_exec($ch);
curl_close($ch);
if ($data === false) {
  echo 'cURL failed';
  exit;
}

$contentLength = 'unknown';
$status = 'unknown';
if (preg_match('/^HTTP\/1\.[01] (\d\d\d)/', $data, $matches)) {
  $status = (int)$matches[1];
}
if (preg_match('/Content-Length: (\d+)/', $data, $matches)) {
  $contentLength = (int)$matches[1];
}

echo 'HTTP Status: ' . $status . "\n";
echo 'Content-Length: ' . $contentLength;
}

请检查解释。我从这些链接获得了上述功能。

http://php.net/manual/en/function.filemtime.php

http://php.net/manual/en/function.filesize.php

Answer 2

您可以使用filemtime()和filesize()。

请注意这个BTW：

As of PHP 5.0.0, this function can also be used with some URL wrappers. 
Refer to List of Supported Protocols/Wrappers for a listing of which wrappers 
support stat() family of functionality.

如何检查远程文件大小和日期？

2 个答案: