How do I get the size of an attachment file?
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16-10-2019 - |
Question
I'm using the following template code to display attachment links:
$args = array(
'post_type' => 'attachment',
'numberposts' => -1,
'post_status' => null,
'post_parent' => $main_post_id
);
$attachments = get_posts($args);
foreach ($attachments as $attachment)
{
the_attachment_link($attachment->ID, false);
}
but after the link I need to display the file's size. How can I do this?
I'm guessing I could determine the file's path (via wp_upload_dir()
and a substr()
of wp_get_attachment_url()
) and call filesize()
but that seems messy, and I'm just wondering if there's a method built into WordPress.
Solution
As far as I know, WordPress has nothing built in for this, I would just do:
filesize( get_attached_file( $attachment->ID ) );
OTHER TIPS
I have used this before in functions.php to display the file size in an easily readable format:
function getSize($file){
$bytes = filesize($file);
$s = array('b', 'Kb', 'Mb', 'Gb');
$e = floor(log($bytes)/log(1024));
return sprintf('%.2f '.$s[$e], ($bytes/pow(1024, floor($e))));}
And then in my template:
echo getSize('insert reference to file here');
I would do :
$attachment_filesize = filesize( get_attached_file( $attachment_id ) );
Or with readable size like 423.82 KB
$attachment_filesize = size_format( filesize( get_attached_file( $attachment_id ) ), 2 );
Refs : get_attached_file(), filesize(), size_format()
Note : Define your $attachment_id
To find the size of a file added through the custom fields plugin, I did this:
$fileObject = get_field( 'file ');
$fileSize = size_format( filesize( get_attached_file( $fileObject['id'] ) ) );
Just make sure you set the custom field's "Return Value" to "File Object".
There's an easier solution, to get human readable file sizes.
$attachment_id = $attachment->ID;
$attachment_meta = wp_prepare_attachment_for_js($attachment_id);
echo $attachment_meta['filesizeHumanReadable'];
I was looking for the same and found this WordPress built-in solution.
$args = array(
'post_type' => 'attachment',
'numberposts' => -1,
'post_status' => null,
'post_parent' => $main_post_id
);
$attachments = get_posts($args);
foreach ($attachments as $attachment)
{
$attachment_id = $attachment->ID;
$image_metadata = wp_get_attachment_metadata( $attachment_id );
the_attachment_link($attachment->ID, false);
echo the_attachment_link['width'];
echo the_attachment_link['height'];
}
See more at wp_get_attachment_metadata()
For audio at least, the file size is saved as "metadata".
$metadata = wp_get_attachment_metadata( $attachment_id );
echo $metadata['filesize'];
This may not be the case for images and video.