If you want to be able to limit images (or any attachments) from being uploaded into the media library if they are too large, you can use the wp_handle_upload_prefilter filter to do this.
Below is a really basic example I whipped up in a few minutes that I shared with a customer not too long ago:
/**
* Limits the maximum size of images that can be uploaded.
*
* @param array $file {
* Reference to a single element from `$_FILES`.
*
* @type string $name The original name of the file on the client machine.
* @type string $type The mime type of the file, if the browser provided this information.
* @type string $tmp_name The temporary filename of the file in which the uploaded file was stored on the server.
* @type int $size The size, in bytes, of the uploaded file.
* @type int $error The error code associated with this file upload.
* }
*
* @return array Filtered file array, with a possible error if the file is too large.
*/
function blarg_limit_max_image_upload_size( $file ) {
if ( str_starts_with( $file['type'], 'image/' ) ) {
$max_size = 1 * 1024; // 1kb.
if ( $file['size'] > $max_size ) {
// translators: %s: Human readable maximum image file size.
$file['error'] .= sprintf( __( 'Uploaded images must be smaller than %s.' ), size_format( $max_size ) );
}
}
return $file;
}
add_filter( 'wp_handle_upload_prefilter', 'blarg_limit_max_image_upload_size', 10, 1 );Code language: PHP (php)Good luck if you use any of my hot garbage in production 😀
