Tweet
Hello everyone,
please let me know about wordpress hooks
Any kind of help highly appreciated.
-
Hello everyone,
please let me know about wordpress hooks
Any kind of help highly appreciated.
-
Using hooks, one piece of code can interact with and change another piece of code at predetermined locations. The creation of WordPress plugins and themes is built on hooks. They serve as sites where programmers can 'hook' their unique code into WordPress at particular points and alter how WordPress behaves without changing core files.
Where are wordpress hooks stored?
WordPress uses the WP_Hook class to implement hook functionality. It stores all wordpress hooks. This class is a collection of objects with properties like callbacks, iterations, current_priority, nesting_level, and doing_action. Additionally, it defines many helpful hook methods that may be used by calling the WP_Hook methods.
Types of Wordpress hooks
These are two types of hooks.- Action hooks
- Filter hooks
Action hooks:- Action hooks clear how to add code from a third-party source.
- The WordPress Core, plugins, and themes will all execute at a certain time.
- Action callback functions can carry out a variety of actions, such as entering data into databases or echoing output to the user.
- The Action hook called the callback function receives nothing from the Action.
Filter hooks:- The use of filter hooks makes adding text or material easier after a post.
- With the use of filters, you can modify data as WordPress Core, plugins, and themes are being used.
- Filters' callback functions take a variable, alter it, and then return it. They shouldn't ever have unintended consequences, such as impacting global variables and output, as they are designed to operate independently.
- Filters plan on getting feedback from the user.
Action hook creationAction hooks Filter hooks Custom functions can be run via actions at a certain time in the WordPress Core execution. Filters allow for the modification or customization of data used by other processes. Actions are defined or created via the WordPress code function do_action("action_name"). The Wordpress function apply_filters('filter_name,' 'value_to_be_filtered') defines or constructs filters. An action can do almost anything as long as the code is sound. To avoid any unwanted side effects, filters should operate independently. add_function() and remove_action() are examples of action hooks. add_filter() and remove_filter() are examples of filter hooks.
First, you must activate the wordpress action hook add_action() function. After that, add the below code to the functions.php file.
add_action( $target_hook, $function_name, $priority, $accepted_arguments );
Using the same target_hook, the scale will display the output order of the functions. Priority_scale's default value is 10. The scale can be set up based on how many target_hooks you have.
$ accepted_args specify the quantity of arguments the function will accept. The system will set it to 1 by default.
Example:
<?php
function hook_example() {
?>
<script>
alert('Welcome to wordpress hooks');
</script>
<?php
}
add_action('wp_head', 'hook_example');
?>
Comment