Using WordPress ‘cache_javascript_headers()’ PHP function

by

The cache_javascript_headers() WordPress PHP function sets the headers for caching for 10 days with a JavaScript content type.

Usage

Here’s a simple example of using cache_javascript_headers():

add_action( 'init', 'cache_javascript_headers' );

In this example, the cache_javascript_headers() function is hooked to the ‘init’ action, enabling JavaScript content to be cached for 10 days as soon as WordPress initializes.

Parameters

  • No parameters for this function.

More information

See WordPress Developer Resources: cache_javascript_headers()

This function was implemented in WordPress 2.1.0. Source code for this function can be found in wp-includes/functions.php.

Examples

Using cache_javascript_headers() on Plugin Activation

This example sets the cache headers when a specific plugin is activated.

function my_plugin_activation() {
    cache_javascript_headers();
}
register_activation_hook( __FILE__, 'my_plugin_activation' );

This code will set the cache headers for JavaScript content when the plugin file this code resides in is activated.

Using cache_javascript_headers() on Custom Page Template

This example sets the cache headers when a specific custom page template is used.

if ( is_page_template( 'template-custom.php' ) ) {
    cache_javascript_headers();
}

This code checks if the current page uses the ‘template-custom.php’ template. If it does, the cache headers for JavaScript content are set.

Using cache_javascript_headers() on AJAX Request

This example sets the cache headers during an AJAX request.

function my_ajax_request() {
    cache_javascript_headers();
    // Process AJAX request here
}
add_action( 'wp_ajax_my_action', 'my_ajax_request' );

In this example, the cache headers for JavaScript content are set whenever an AJAX request is made to ‘my_action’.

Using cache_javascript_headers() on Custom Hook

This example sets the cache headers whenever a custom action hook is triggered.

function my_custom_action() {
    cache_javascript_headers();
}
add_action( 'my_custom_hook', 'my_custom_action' );

This code will set the cache headers for JavaScript content whenever the custom hook ‘my_custom_hook’ is triggered.

Using cache_javascript_headers() on Specific Post

This example sets the cache headers when a specific post is viewed.

if ( is_single( '123' ) ) {
    cache_javascript_headers();
}

In this example, the cache headers for JavaScript content are set when the post with the ID of 123 is viewed.