WordPress | Hook create_{$taxonomy}

Hello! Today, we would like to talk about one of the extraordinary features of WordPress called "hooks". Hooks provide you with the ability to execute specific actions at designated times after a certain operation has been carried out. One of these hooks is create_{$taxonomy}, which helps you create a new category or tag (identified as taxonomy) and perform specific actions.

Whenever a new taxonomy is created, this hook gets triggered and can be utilized for tasks such as saving additional settings or creating automated information. Generally, hooks can be divided into action and filter categories where create_{$taxonomy} belongs to action hooks. This means you can add a code to your function that will execute immediately after the creation of the taxonomy.

Let’s take a look at the structure of this hook as well. Its format is create_{$taxonomy}, where {$taxonomy} represents the name of your taxonomy. For instance, if you have a taxonomy named "category", this hook will be in the form of create_category.

Now, let’s go to the code! We can create a simple function for this hook so that we can carry out actions when creating a new taxonomy. Then, we will review the code step-by-step with examples to illustrate how we can implement this hook.

function my_custom_function( $term_id ) {
    // This function executes a specific action after creating a new taxonomy
    $term = get_term( $term_id ); // Retrieve the details of the new taxonomy
    // We can perform other tasks such as saving data or sending emails
}
add_action( 'create_category', 'my_custom_function' ); // Attach this hook to the function

Let’s analyze the following code line by line:

Analyzing Code Line by Line

function my_custom_function( $term_id ) {
We create a function named my_custom_function that takes a parameter named $term_id. This parameter identifies the new taxonomy.

$term = get_term( $term_id );
In this line, we use the get_term function to retrieve information about the new taxonomy. This information includes the name, description, etc.

add_action( 'create_category', 'my_custom_function' );
In the last line, we connect the create_category hook to our function my_custom_function. This way, whenever a new term is created, our function will be executed.