程式設計@筆記

例1
<?php
echo filesize("test.txt");
?>
輸出：
20

例2
<?php

// outputs e.g. somefile.txt: 1024 bytes

$filename = 'somefile.txt';
echo $filename . ': ' . filesize($filename) . ' bytes';

?>

例3
<?php

echo FileSizeConvert(filesize("1.pdf"));

function FileSizeConvert($bytes)
{
$bytes = floatval($bytes);
$arBytes = array(
0 => 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;
}
?>