hooks - Read For Learn

Is it possible to change image urls by hooks?

As you want to change (use different) URL for featured image only, you can use pre_option_upload_url_path hook. // Setting the uploads directory URL function wpse_change_featured_img_url() { return ‘http://www.example.com/media/uploads’; } add_filter( ‘pre_option_upload_url_path’, ‘wpse_change_featured_img_url’ ); This hook will not change URLs permanently but it will set uploads directory to some different URL temporally. This will also not … Read more

Plugins rewrite rules the right way

The add_rewrite_rule function doesn’t change the database. Just an array in memory. It is not an expensive operation. The alternative is to add code to detect whether your rule is there, which is actually more expensive than just modifying the array.

Understanding WP

The reason hooks ( Filters and Actions ) are in these templates is specifically so you don’t need to copy the templates into your theme folder. The biggest issue with copying WooCommerce templates into your theme is that often time whenever WooCommerce updates they also update the templates. Then you’ll need to bring your changes … Read more

Genesis: How to add content after aside and before the content-sidebar wrap

If you look in lib/structure/layout.php, towards the bottom, you’ll see: add_action( ‘genesis_after_content’, ‘genesis_get_sidebar’ ); /** * Output the sidebar.php file if layout allows for it. * * @since 0.2.0 * * @uses genesis_site_layout() Return the site layout for different contexts. */ function genesis_get_sidebar() { $site_layout = genesis_site_layout(); //* Don’t load sidebar on pages that don’t … Read more

How to catch and modify custom field values when a page is updated

It all depends on how your “custom fields” are saved. If you store the values as post meta then you would have to call the update_post_meta function to update them on wp_insert_post_data. In the example below Im setting the post meta “my_meta_key” with the string value “my_meta_value”. function save_my_post( $content ) { global $post; if( … Read more

Using hooks with extra parameters

Since do_action( ‘woocommerce_before_single_product_summary’ ); doesn’t have any additional input arguments like: do_action( ‘woocommerce_before_single_product_summary’, $args1, $args2, $args3 ); then your action callback will always be called without any input arguments. function my_own_function () { // … } So you will have to get it by other means: e.g. through functions, classes or by tapping values from … Read more

Event-Driven Pattern vs MVC?

I will try to explain it simplest as i can: MVC Framework – Is a framework, that uses MVC software architectural pattern. This pattern sepatares logic in Controller, data in Models, and HTML code in Views. This 3 are separated in different files, so code is cleaner. Event Driven Pattern – Is a software architecture … Read more

Method to find a hook

Here in this page its the list of all action and filter hooks, just click on one and it will tell you in which file you can find it, a partial view of where is declared, and below are the related hooks. you can see a list of hooks and the functions attached to it … Read more

What’s the difference between “wp” and “wp_loaded”?

wp_loaded is fired once WordPress, all plugins, and the theme are fully loaded and instantiated. wp runs immediately after the global WP class object is set up. wp_loaded fires before wp. See the actions run during a typical request.

Hooking into the init action will fire it too frequently?

It really depends on your situation. Whenever you add a rewrite rule and flush the permalinks, it will stay there till the next change/flush of the permalink’s settings. If it’s vital for your rules to exist, you can check if it exists on init, and then add it if it’s not there. Take a look … Read more

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