How can Iterate and add the title to an array through custom posts?

patrick

I was trying to test a few custom posts so I can iterate through them, extract the each title and add the titles to an list. I am doing this to create a selected field in woocommerce using the array contents to generate the options (it's not yet been done).
Please check my codes it's not working, site goes down and I get nothing in a var_dump

add_action('woocommerce_after_order_notes', 'custom_checkout_field');

function custom_checkout_field($checkout)

{

$args = array(
    'post_type'         => 'pickup-point',
    'posts_per_page'    => -1,
    'post_status'       => 'publish'
    );

// Custom query to pull in the pickup points.
$query = new WP_Query( $args );

// Check that we have query results.
if ( $query->have_posts() ) {


    $available_locations = [];

  while ( $query->have_posts() ) {

        $query->the_post();

        array_push($available_locations, the_title());

    }
}

var_dump ($available_locations);

}

// Restore original post data.
wp_reset_postdata();

anderson

In your code the_title() echos the post title although returning the title would be more suitable in this context. Also wp_reset_postdata() should be after the whileloop inside the ifstatement.
You need post titles, which can get directly from the post objects from the query object without setting up the loop with have_posts() and the_post(). Like so,

As you can see I added extra parameters to the query $args, for making the query a bit more efficient as only post titles are needed.
add_action('woocommerce_after_order_notes', 'custom_checkout_field');
function custom_checkout_field($checkout) {

  $args = array(
    'post_type'              => 'pickup-point',
    'posts_per_page'         => -1,
    'post_status'            => 'publish',
    'no_found_rows'          => true, // pagination not needed
    'update_post_meta_cache' => false, // post meta not needed
    'update_post_term_cache' => false, // taxonomy terms not needed
  );
  $query = new WP_Query( $args );

  $titles = array_map( 'get_the_title', $query->posts );
  if ( $titles ) {
    // do something with $titles    
  }

}