Convert bytes

convert-bytes.php

<?php

/**
 * Convert bytes
 * @param int|string $bytes
 * @return mixed returns an array with the converted value and a label key (see $unit)
 */
function convert_bytes($bytes)
{    
     $unit     = array(
                    'label_file_b_size',
                    'label_file_kb_size',
                    'label_file_mb_size',
                    'label_file_gb_size',
               );
     
     if( empty($bytes) ) {
     	return array(0, $unit[0]);
     }

     return array(@round($bytes/pow(1024,($i=floor(log($bytes,1024)))),2), $unit[$i]);
}

list($value, $unit) = convert_bytes(118218);