WordPress at a glance
function is not described

wp_xmlrpc_server::mt_setPostCategories() public WP 1.5.0

Sets categories for a post.

{} It's a method of the class: wp_xmlrpc_server{}

Hooks from the method
Return

true/IXR_Error. True on success.

Usage

$wp_xmlrpc_server = new wp_xmlrpc_server();
$wp_xmlrpc_server->mt_setPostCategories( $args );
$args(array) (required)

Method arguments. Note: arguments must be ordered as documented.

  • post_ID(int)

  • username(string)

  • password(string)

  • categories(array)

Changelog

Since 1.5.0 Introduced.

Code of wp_xmlrpc_server::mt_setPostCategories() WP 5.5.1

<?php
public function mt_setPostCategories( $args ) {
	$this->escape( $args );

	$post_ID    = (int) $args[0];
	$username   = $args[1];
	$password   = $args[2];
	$categories = $args[3];

	$user = $this->login( $username, $password );
	if ( ! $user ) {
		return $this->error;
	}

	/** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
	do_action( 'xmlrpc_call', 'mt.setPostCategories' );

	if ( ! get_post( $post_ID ) ) {
		return new IXR_Error( 404, __( 'Invalid post ID.' ) );
	}

	if ( ! current_user_can( 'edit_post', $post_ID ) ) {
		return new IXR_Error( 401, __( 'Sorry, you are not allowed to edit this post.' ) );
	}

	$catids = array();
	foreach ( $categories as $cat ) {
		$catids[] = $cat['categoryId'];
	}

	wp_set_post_categories( $post_ID, $catids );

	return true;
}