【www.gdgbn.com--php函数】

php 获取文件大小函数与实例教程
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.net/banner/logo.gif")
?>

本文来源:http://www.gdgbn.com/jiaocheng/23164/