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Source View: admin_post_thumbnail_html

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Line Code
1081           else
1082                $thumbnail_html = wp_get_attachment_image( $thumbnail_id, 'post-thumbnail' );
1083           if ( !empty( $thumbnail_html ) ) {
1084                $content = '<a href="#" id="set-post-thumbnail" onclick="jQuery(\'#add_image\').click();return false;">' . $thumbnail_html . '</a>';
1085                $content .= '<p class="hide-if-no-js"><a href="#" id="remove-post-thumbnail" onclick="WPRemoveThumbnail();return false;">' . esc_html__( 'Remove thumbnail' ) . '</a></p>';
1086           }
1087           $content_width = $old_content_width;
1088      }
1089
1090      return apply_filters( 'admin_post_thumbnail_html', $content );
1091 }
1092
1093 /**
1094  * Check to see if the post is currently being edited by another user.
1095  *
1096  * @since 2.5.0
1097  *
1098  * @param int $post_id ID of the post to check for editing
1099  * @return bool|int False: not locked or locked by current user. Int: user ID of user with lock.