How to use pre_get_table_charset filter in WordPress

Example 1: Modifying Charset for a Table

Here’s a simple example to modify the charset for a specific table using the pre_get_table_charset filter. You define a function, and then hook it up with add_filter.

        function weplugins_modify_pre_get_table_charset_defaults($charset, $table) { 
            // Update the $charset variable according to your website requirements and return this variable.
            return $charset; 
        }
        // Adding the filter
        add_filter("pre_get_table_charset", "weplugins_modify_pre_get_table_charset_defaults", 10, 2);
        

Example 2: Conditional Charset Modification

If you want to conditionally modify the $charset based on the table name, here’s how you can do it. This approach allows for more granular control.

        function weplugins_conditional_charset($charset, $table) {
            if ($table === 'wp_posts') {
                $charset = 'utf8mb4';
            }
            return $charset;
        }
        add_filter("pre_get_table_charset", "weplugins_conditional_charset", 10, 2);
        

Example 3: Removing the Filter

Sometimes, you might need to remove a registered hook. Use the remove_filter function as shown below. Make sure you provide the same callback function name, priority, and number of arguments.

        remove_filter("pre_get_table_charset", "weplugins_modify_pre_get_table_charset_defaults", 10, 2);
        

If you’re having any trouble using this hook or need some customization, feel free to Contact Us at WePlugins, and we’d be happy to assist you.