Using hooks require little knowledge of HTML and PHP. Fortunately, creating action and filter hooks is relatively easy, even for WordPress beginners.
Creating an Action Hook
To add an action hook, you need to activate the add_action () function in WordPress plugin. To do this, add the following code to your WordPress functions.php file:
<?php
function hook_javascript() {
?>
<script>
alert('Hello world...');
</script>
<?php
}
add_action('wp_head', 'hook_javascript');
?>
Note the pattern in the instance above:
<?php – the place where you put the hook for the function.
function hook_javascript() – a function who will impress the initial value, thus showing the alert for users.
<script> – Indicates the text you want to display on the target_hook.
alert(‘Hello world…’); – will display an alert to users with the phrase “Hello World”.
add_action – command to create an action hook.
‘wp_head‘ – target hook that will improve function.
In practice, it sees something like this:
Creating a Filter Hook
To add an filter hook, you need activate the add_filter() function in a WordPress plugin. To do this, add the following code to your WordPress functions.php file:
<?php
add_filter( 'the_content', 'change_content' );
function change_content ( $content ) {
$content .= 'Filter hooks are amazing!';
return $content;
}
?>
Note the pattern in the instance above:
‘the_content‘ –target hook that will improve function.
‘change_content‘ – impress the initial value, thereby changing the actual content.
$content = ‘Filter hooks are amazing!’; – replaces all of your post’s content with the written phrase.
return $content; – Finally returns the new value.
In practice, it sees something like this:
Conclusion:
WordPress hooks can be beneficial any website owner. They permit you to add custom functions or disable procedure without changing the WordPress core files.
In this article, we’ve created action and filter WordPress hooks and shown some practical instances.