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Core_Text::bytes

Returns human readable sizes. Based on original functions written by Aidan Lister and Quentin Zervaas.

echo Text::bytes(filesize($file));

string Core_Text::bytes( integer $bytes [, string $force_unit = null , string $format = null , boolean $si = bool true ] )

参数列表

参数类型描述默认值

$bytes integer Size in bytes

$force_unit string A definitive unit null

$format string The return string format null

$si boolean Whether to use SI prefixes or IEC bool true

参数	类型	描述	默认值
`$bytes`	`integer`	Size in bytes
`$force_unit`	`string`	A definitive unit	null
`$format`	`string`	The return string format	null
`$si`	`boolean`	Whether to use SI prefixes or IEC	bool true

返回值

string

File: ./core/classes/text.class.php

public static function bytes($bytes, $force_unit = NULL, $format = NULL, $si = TRUE)
{
    // Format string
    $format = (null===$format) ? '%01.2f %s' : (string)$format;

    // IEC prefixes (binary)
    if ( false==$si || false!==strpos($force_unit, 'i'))
    {
        $units = array('B', 'KiB', 'MiB', 'GiB', 'TiB', 'PiB');
        $mod = 1024;
    }
    // SI prefixes (decimal)
    else
    {
        $units = array('B', 'kB', 'MB', 'GB', 'TB', 'PB');
        $mod = 1000;
    }

    // Determine unit to use
    if ( ($power = array_search((string)$force_unit, $units)) === FALSE )
    {
        $power = ($bytes > 0) ? floor(log($bytes, $mod)) : 0;
    }

    return sprintf($format, $bytes / pow($mod, $power), $units[$power]);
}