Wordpress JSON删除重复的Object - functions.php

Question

i'm trying to make a JSON route in WordPress that shows only the categories of the posts, without repeating, what i have so far its this:

add_action( 'rest_api_init', 'register_route_cat' ); 
function register_route_cat() {
    register_rest_route( 
        'lojas/v1',
        '/linha/(?P<stringvar>.+)',
        array(
            'methods' => 'GET',
            'callback' => 'get_categories_map',
        )
    );
}

function get_categories_map( $data ) {
  // get the posts type loja
    $posts_list = get_posts( array(
        'post_type' => 'loja',
        'posts_per_page' => 50,
        'post_status'    => 'publish'
    ));

    $post_data = array();


    foreach( $posts_list as $posts) {

        $post_id = $posts->ID;
        $post_title = $posts->post_title;
        $post_estacao = wp_get_post_terms($post_id, 'estacao', array("fields" => "names"));
        $post_cat = wp_get_post_terms($post_id, 'categoria_loja', array("fields" => "names"));
        $cat_imploded = implode(', ', $post_cat);



        $values = array(
                    'id' =>  $cat_imploded,
                    'title' =>  $cat_imploded,
                    'color' =>  $cat_imploded,
                );


        if ($post_estacao[0] == $linha_select  && $cat_imploded != NULL ) {

            array_push($post_data, $values);

        }


    }

    return  $post_data;

}

and it gives me this:

https://i.stack.imgur.com/KvHNe.png

how can i remove the repeated objects?

Thanks!

Answer 1

You can take advantage of PHP's associative arrays to guarantee uniqueness.

You should make the following changes:

// array_push($post_data, $values);
$post_data[ $cat_imploded ] = $values;

// return  $post_data;
return array_values($post_data);

---

So get_categories_map() code should look like this:

function get_categories_map( $data ) {
  // get the posts type loja
    $posts_list = get_posts( array(
        'post_type' => 'loja',
        'posts_per_page' => 50,
        'post_status'    => 'publish'
    ));

    $post_data = array();


    foreach( $posts_list as $posts) {

        $post_id = $posts->ID;
        $post_title = $posts->post_title;
        $post_estacao = wp_get_post_terms($post_id, 'estacao', array("fields" => "names"));
        $post_cat = wp_get_post_terms($post_id, 'categoria_loja', array("fields" => "names"));
        $cat_imploded = implode(', ', $post_cat);



        $values = array(
                    'id' =>  $cat_imploded,
                    'title' =>  $cat_imploded,
                    'color' =>  $cat_imploded,
                );


        if ($post_estacao[0] == $linha_select  && $cat_imploded != NULL ) {

            // Build an associative array to ensure that only one instance of $cat_imploded exists in the array
            $post_data[ $cat_imploded ] = $values;

        }


    }

    // Use array_values() to convert the associative array into an indexed array
    return array_values($post_data);

}