Summary

A “content class element” is a reusable UI section that content classes (Login, Map, WP Post Content, etc.) assemble into per-screen output. Rather than each content class duplicating the markup-shape logic for “add to cart” or “featured image” or “social media”, it fires a filter and gets back a content_sections[] entry to append.

A content class is the per-screen handler. An element is a reusable section a content class composes into its output.

Where it appears

Inside the content_sections array on any per-screen JSON payload:

"content_sections": [
  { "title": "Featured", "content": "...", "type": "featured_image", "show_title": false },
  { "title": "Order details", "content": "...", "type": "order_details", "show_title": true },
  ...
]

Pattern

Every element function follows this shape:

function mam_main_content_element_<name>( $data_array, ...args ) {
    $data_array['content_sections'][] = array(
        'title'      => ...,
        'content'    => ...,
        'type'       => '<name>',
        'show_title' => ...,
    );
    return $data_array;
}
add_filter( 'mam_main_content_element_<name>', 'mam_main_content_element_<name>', 10, N );

Element filters registered

Sub-filter hooks

Several elements fire a *_args filter so external code can override default labels, login-prompt copy, or other parameters before the element is appended:

• mam_main_content_element_add_to_cart_args
• mam_main_content_element_make_offer_args

Reads / Writes

None — pure data transformation. No DB reads, no options, no globals.

Common recipes

Use a content element from inside a custom content class:

$data_array = apply_filters( 'mam_main_content_element_featured_image', $data_array, $post_id );

Override the add-to-cart label:

add_filter( 'mam_main_content_element_add_to_cart_args', function ( $args ) {
    $args['button_label'] = 'Buy now';
    return $args;
} );

Replace the shipping-status stub with a live implementation:

add_filter( 'mam_main_content_element_show_shipping_status', 'my_real_shipping_status', 20, 2 );

Gotchas

• mam_main_content_element_show_shipping_status is a stub that returns input unchanged. The real implementation is mam_main_content_element_shipping_status (without the show_ prefix). Both filter names exist; sibling plugins often replace the stub.
• “Element” vs “class” terminology — content class is the per-screen handler; element is a reusable section a content class assembles into its output. The two terms are not interchangeable.
• Procedural file, not a class. Loaded via the register_*() cascade in mam-main.php. There’s no central registry — you discover elements by reading general-elements.php.

Related articles

• Content classes overview
• Content class: WP Post Content
• Mobile JSON shape

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