we have a multisite installation with following configuration:
bash-5.0# cat /usr/local/etc/php/conf.d/uploads.ini file_uploads = On memory_limit = 500M upload_max_filesize = 100M post_max_size = 100M max_execution_time = 600 max_file_uploads = 50000 max_execution_time = 5000 max_input_time = 5000
Our /usr/local/etc/php/php.ini has:
;;;;;;;;;;;;;;;; ; File Uploads ; ;;;;;;;;;;;;;;;; ; Whether to allow HTTP file uploads. ; http://php.net/file-uploads file_uploads = On ; Temporary directory for HTTP uploaded files (will use system default if not ; specified). ; http://php.net/upload-tmp-dir ;upload_tmp_dir = ; Maximum allowed size for uploaded files. ; http://php.net/upload-max-filesize upload_max_filesize = 2M ; Maximum number of files that can be uploaded via a single request max_file_uploads = 20
but on the wp-admin panel we see this:
How an we fix this? None of the existing answers helped here. we checked functions.php file. It does not have any ini_set calls in it.
Running phpinfo we have observed:
Loaded Configuration File => /usr/local/etc/php/php.ini Additional .ini files parsed => /usr/local/etc/php/conf.d/docker-php-ext-bcmath.ini, ... /usr/local/etc/php/conf.d/uploads.ini post_max_size => 100M => 100M upload_max_filesize => 100M => 100M
https://developer.wordpress.org/reference/functions/wp_max_upload_size/
in
function wp_max_upload_size() {
$u_bytes = wp_convert_hr_to_bytes( ini_get( 'upload_max_filesize' ) );
$p_bytes = wp_convert_hr_to_bytes( ini_get( 'post_max_size' ) );
/**
* Filters the maximum upload size allowed in php.ini.
*
* @since 2.5.0
*
* @param int $size Max upload size limit in bytes.
* @param int $u_bytes Maximum upload filesize in bytes.
* @param int $p_bytes Maximum size of POST data in bytes.
*/
return apply_filters( 'upload_size_limit', min( $u_bytes, $p_bytes ), $u_bytes, $p_bytes );
}
Answers:
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Method 1
Upon debugging we found the wp_max_upload_size function was returning 1MB. The u_bytes and p_bytes were as expected and equal to 100MB as defined in our uploads.ini file but the application of upload_size_limit filter changed the size to 1MB i.e., the problem was at:
return apply_filters( 'upload_size_limit', min( $u_bytes, $p_bytes ), $u_bytes, $p_bytes );
A upload_size_limit_filter is defined in wp-includes/ms-functions.php and is wired up to execute only for a multisite installation. (the wiring code is in wp-includes/ms-default-filters.php. The filename has a ms prefix standing for multisite):
// this function runs only for a multisite installation of wordpress
function upload_size_limit_filter( $size ) {
$fileupload_maxk = KB_IN_BYTES * get_site_option( 'fileupload_maxk', 1500 );
if ( get_site_option( 'upload_space_check_disabled' ) ) {
return min( $size, $fileupload_maxk );
}
return min( $size, $fileupload_maxk, get_upload_space_available() );
}
and tracing the code path we found that fileupload_maxk equalled 1536000 and so this is what was causing the issue. The fileupload_maxk value is fetched from MySQL.
Continuing, we could see this in MySQL DB. The wp_sitemeta table only exists for a multisite installation:
mysql> select * from wp_sitemeta where meta_key = 'fileupload_maxk'; +---------+---------+-----------------+------------+ | meta_id | site_id | meta_key | meta_value | +---------+---------+-----------------+------------+ | 7 | 1 | fileupload_maxk | 1500 | +---------+---------+-----------------+------------+ 1 row in set (0.00 sec)
and so the fix for this problem is to update this value. It can be done using wp-cli as follows. We are using a multisite installation so have to use wp site command:
bash-5.0# wp site option update fileupload_maxk 10000 --allow-root Success: Updated 'fileupload_maxk' site option.
This updates the entry in MySQL and the issue is fixed. In short, it seems that the fileupload_maxk does not seem to be well known. None of our Google searches on original query led us to it. Here is another answer on SO that talks about fileupload_maxk.
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