PHP filesize() 函数

filesize(filename)

 array( "UNIT" => "TB", "VALUE" => pow(1024, 4) ), 1 => array( "UNIT" => "GB", "VALUE" => pow(1024, 3) ), 2 => array( "UNIT" => "MB", "VALUE" => pow(1024, 2) ), 3 => array( "UNIT" => "KB", "VALUE" => 1024 ), 4 => array( "UNIT" => "B", "VALUE" => 1 ), ); foreach($arBytes as $arItem) { if($bytes >= $arItem["VALUE"]) { $result = $bytes / $arItem["VALUE"]; $result = str_replace(".", "," , strval(round($result, 2)))." ".$arItem["UNIT"]; break; } } return $result; } ?>

 2 Gb) * For file size over PHP_INT_MAX (2 147 483 647), PHP filesize function loops from -PHP_INT_MAX to PHP_INT_MAX. * * @param string $path Path of the file * @return mixed File size or false if error */ function realFileSize($path) { if (!file_exists($path)) return false; $size = filesize($path); if (!($file = fopen($path, 'rb'))) return false; if ($size >= 0) {//Check if it really is a small file (< 2 GB) if (fseek($file, 0, SEEK_END) === 0) {//It really is a small file fclose($file); return $size; } } //Quickly jump the first 2 GB with fseek. After that fseek is not working on 32 bit php (it uses int internally) $size = PHP_INT_MAX - 1; if (fseek($file, PHP_INT_MAX - 1) !== 0) { fclose($file); return false; } $length = 1024 * 1024; while (!feof($file)) {//Read the file until end $read = fread($file, $length); $size = bcadd($size, $length); } $size = bcsub($size, $length); $size = bcadd($size, strlen($read)); fclose($file); return $size; }