Tag: functions

How can I get the ID of the current page in php functions when creating a meta-query filter? I have made many attempts but all return Null. The filter works as expected when I manually enter a number, but I need it to automatically echo the current post ID. Any advice is appreciated, thank you.

$args = array(
  'post_type' => 'project',
  'post_status' => 'publish',
  'post_parent' => 'HOW DO I GET CURRENT PAGE ID?',
  'meta_query' => $meta_query,
); 

Here is the full function:

add_action('wp_ajax_my_ajax_filter_search', 'my_ajax_filter_search_callback');
add_action('wp_ajax_nopriv_my_ajax_filter_search', 'my_ajax_filter_search_callback');

function my_ajax_filter_search_callback() {

  header("Content-Type: application/json");

  $meta_query = array('relation' => 'AND');

  if(isset($_GET('project_type'))) {
    $project_type = sanitize_text_field( $_GET('project_type') );
    $meta_query() = array(
        'key' => 'project_type',
        'value' => $project_type,
        'compare' => '='
    );
  }

  $args = array(
      'post_type' => 'project',
        'post_status' => 'publish',
        'post_parent' => 'HOW DO I GET CURRENT PAGE ID?',
      'meta_query' => $meta_query,
  );

  if ( $search_query->have_posts()) {

      $filter_result = array();

      while ( $search_query->have_posts() ) {

          $search_query->the_post();

          $filter_result() = array(
              "id" => get_the_ID(),
              "title" => get_the_title(),
              "permalink" => get_permalink(),
              "status" => get_field('status'),
              "tags" => get_field('tags'),
              "project_type" => get_field('project_type'),
          );
      }
      wp_reset_query();

      echo json_encode($filter_result);

  } else {
    echo 'no content';
  }
  wp_die();
}