~~~ //获取文件的大小 function getfilesize($file) { $perms = stat($file); $size = $perms['size']; // 单位自动转换函数 $kb = 1024; // Kilobyte $mb = 1024 * $kb; // Megabyte $gb = 1024 * $mb; // Gigabyte $tb = 1024 * $gb; // Terabyte if ($size < $kb) { return $size . " B"; } else if ($size < $mb) { return round($size / $kb, 2) . " KB"; } else if ($size < $gb) { return round($size / $mb, 2) . " MB"; } else if ($size < $tb) { return round($size / $gb, 2) . " GB"; } else { return round($size / $tb, 2) . " TB"; } } filesize(filename)直接获取文件字节数 ~~~