PHP has a handy function called filesize() which can help us display how big a file is.
It does this in bytes by default, but with a bit of tinkering we can easily convert this into kilobytes or megabytes.
Let’s first see how this works in bytes:
$file = '/path/to/your/file'; $filesize = filesize($file); echo "The size of your file is $filesize bytes.";
Converting bytes into kilobytes works by dividing the value by 1024. PHP is very accurate and will give you 12 decimal digits – perhaps a little overkill. To avoid this we can make use of the round() function and specify how many digits of accuracy we’d like to display:
$file = '/path/to/your/file'; $filesize = filesize($file); // bytes $filesize = round($filesize / 1024, 2); // kilobytes with two digits echo "The size of your file is $filesize KB.";
To display the value in megabytes we’ll simply divide by 1024 twice:
$file = '/path/to/your/file'; $filesize = filesize($file); // bytes $filesize = round($filesize / 1024 / 1024, 1); // megabytes with 1 digit echo "The size of your file is $filesize MB.";