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Description

Ajax handler for setting the featured image for an attachment.

Usage

wp_ajax_set_attachment_thumbnail();

Parameters

Returns

void

Source

File name: wordpress/wp-admin/includes/ajax-actions.php
Lines:

function wp_ajax_set_attachment_thumbnail() {
  if ( empty( $_POST['urls'] ) || ! is_array( $_POST['urls'] ) ) {
    wp_send_json_error();
  }

  $thumbnail_id = (int) $_POST['thumbnail_id'];
  if ( empty( $thumbnail_id ) ) {
    wp_send_json_error();
  }

  $post_ids = array();
  // For each URL, try to find its corresponding post ID.
  foreach ( $_POST['urls'] as $url ) {
    $post_id = attachment_url_to_postid( $url );
    if ( ! empty( $post_id ) ) {
      $post_ids[] = $post_id;
    }
  }

  if ( empty( $post_ids ) ) {
    wp_send_json_error();
  }

  $success = 0;
  // For each found attachment, set its thumbnail.
  foreach ( $post_ids as $post_id ) {
    if ( ! current_user_can( 'edit_post', $post_id ) ) {
      continue;
    }

    if ( set_post_thumbnail( $post_id, $thumbnail_id ) ) {
      $success++;
    }
  }

  if ( 0 === $success ) {
    wp_send_json_error();
  } else {
    wp_send_json_success();
  }

  wp_send_json_error();
}
 

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