php 位元組換算函數

代碼如下

複製代碼

//位元組換算 function conversion($size) { $kb = 1024; // 1KB（Kibibyte，KB）=1024B， $mb = 1024 * $kb; //1MB（Mebibyte，MB，簡稱“兆”）=1024KB， $gb = 1024 * $mb; // 1GB（Gigabyte，吉位元組，又稱“千兆”）=1024MB， $tb = 1024 * $gb; // 1TB（Terabyte，萬億位元組，太位元組）=1024GB， $pb = 1024 * $tb; //1PB（Petabyte，千萬億位元組，拍位元組）=1024TB， $fb = 1024 * $pb; //1EB（Exabyte，Exabyte，艾位元組）=1024PB， $zb = 1024 * $fb; //1ZB（Zettabyte，十萬億億位元組，澤位元組）= 1024EB， $yb = 1024 * $zb; //1YB（Yottabyte，一億億億位元組，堯位元組）= 1024ZB， $bb = 1024 * $yb; //1BB（Brontobyte，一千億億億位元組）= 1024YB   if ($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 / $gb, 2) . " GB"; } else if ($size < $pb) { return round($size / $tb, 2) . " TB"; } else if ($size < $fb) { return round($size / $pb, 2) . " PB"; } else if ($size < $zb) { return round($size / $fb, 2) . " EB"; } else if ($size < $yb) { return round($size / $zb, 2) . " ZB"; } else { return round($size / $bb, 2) . " YB"; }   }