- 直接获取的方法:将文件使用file_get_contents取回后,strlen或者存为文件后使用filesize
- 使用get_header
$a_array = get_headers($url, true);
$size = $a_array['Content-Length'];
Echo $size;
3.使用fsockopen,然后正则匹配出文件大小
function get_file_size($url) {
$url = parse_url($url);
if (empty($url['host'])) {
return false;
}
$url['port'] = empty($url['post']) ? 80 : $url['post'];
$url['path'] = empty($url['path']) ? '/' : $url['path'];
$fp = fsockopen($url['host'], $url['port'], $error);
if($fp) {
fputs($fp, "GET " . $url['path'] . " HTTP/1.1\r\n");
fputs($fp, "Host:" . $url['host']. "\r\n\r\n");
while (!feof($fp)) {
$str = fgets($fp);
if (trim($str) == '') {
break;
}elseif(preg_match('/Content-Length:(.*)/si', $str, $arr)) {
return trim($arr[1]);
}
}
fclose ( $fp);
return false;
}else {
return false;
}
}