How to use dbdelta_queries filter in WordPress

dbdelta_queries filter

Filters the dbDelta SQL queries.

To use the dbdelta_queries 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 modify_dbdelta_queries_defaults which takes 1 parameter and we registered it using add_filter. The first parameter dbdelta_queries is the name of the hook, the second parameter modify_dbdelta_queries_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 dbdelta_queries filter.

Parameters

Below the 1 parameter is required to use this hook.

• $queries: (string[]) An array of dbDelta SQL queries.

Live Example

apply_filters( 'dbdelta_queries', string[] $queries )

Below is an example of how you can use this hook.

Example 1: Modify dbDelta Queries

    function weplugins_modify_dbdelta_queries_defaults($queries) { 
        // Update the $queries variable according to your website requirements and return this variable. You can modify the $queries variable conditionally too if you want.
        return $queries; 
    }
    // add the filter
    add_filter( "dbdelta_queries", "weplugins_modify_dbdelta_queries_defaults", 10, 1 );
    

Example 2: Remove dbdelta_queries Hook

remove_filter( "dbdelta_queries", "weplugins_modify_dbdelta_queries_defaults", 10, 1 );

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

Example 3: Conditional Modification

    function weplugins_conditional_modify_dbdelta_queries($queries) { 
        // Conditionally modify the $queries based on custom logic
        if (some_condition) {
            // Modify $queries
        }
        return $queries;
    }
    // add the filter
    add_filter( "dbdelta_queries", "weplugins_conditional_modify_dbdelta_queries", 10, 1 );
    

If you’re having any trouble using this hook, please contact us and we’d be happy to assist you.