How to use pre_wp_filesize filter in WordPress

pre_wp_filesize filter

Filters the result of wp_filesize before the PHP function is run.

To use pre_wp_filesize filter, first you have to register it using add_filter. You can write this code into functions.php of your activated theme or in a custom WordPress Plugin.

We at WePlugins, always prefer to create a custom WordPress Plugin while using hooks so nothing breaks when you update your WordPress Theme in the future.

In the below live example, we have defined a function weplugins_modify_pre_wp_filesize_defaults which takes 2 parameters and we registered using add_filter. The first parameter pre_wp_filesize is the name of the hook, the second parameter weplugins_modify_pre_wp_filesize_defaults is the name of the function which needs to be called, the third parameter is the priority of calling the hook if the same hook is used multiple times, and the last parameter is the number of arguments (if any) to be passed in the registered function.

Sometimes, you have to remove a registered hook so you can use remove_filter to remove pre_wp_filesize filter.

Parameters

Below are the 2 parameters required to use this hook.

• $size : (null|int) The unfiltered value. Returning an int from the callback bypasses the filesize call.
• $path : (string) Path to the file.

Live Examples

Example 1: Basic Usage

Below is an example of how you can use this hook to simply return the file size.

    function weplugins_modify_pre_wp_filesize_defaults($size, $path) { 
        // Update the $size variable according to your website requirements and return this variable.
        return $size; 
    }
    // Add the filter
    add_filter( "pre_wp_filesize", "weplugins_modify_pre_wp_filesize_defaults", 10, 2 );
    

Example 2: Conditional File Size Modification

Here’s an example where the file size is modified based on specific conditions.

    function weplugins_modify_pre_wp_filesize_conditionally($size, $path) { 
        if (strpos($path, 'specific-folder') !== false) {
            $size = 1024 * 1024; // Set size to 1MB for files in 'specific-folder'
        }
        return $size; 
    }
    // Add the filter
    add_filter( "pre_wp_filesize", "weplugins_modify_pre_wp_filesize_conditionally", 10, 2 );
    

Example 3: Removing the Hook

To remove a hook callback, use the example below.

    // Remove the filter
    remove_filter( "pre_wp_filesize", "weplugins_modify_pre_wp_filesize_defaults", 10, 2 );
    

Please make sure to provide the same callback function name, priority, and number of arguments while removing the hook callback.

Contact Us

If you need any customization or are having trouble using this hook, please contact our WordPress Development Team and we’d be happy to assist you.