avoid_blog_page_permalink_collision() WordPress Function

When creating a new blog page in WordPress, it's important to avoid any potential permalink collisions. The avoid_blog_page_permalink_collision() function helps to ensure that your new blog page won't conflict with any existing pages or posts on your site. This function takes a single parameter, the desired permalink for your new blog page. It then checks to see if that permalink is already in use on your site. If it is, the function generates a new permalink for your blog page that won't conflict with any other pages or posts.

avoid_blog_page_permalink_collision( array $data, array $postarr ) #

function avoid_blog_page_permalink_collision( $data, $postarr ) {
	if ( is_subdomain_install() ) {
		return $data;
	}
	if ( 'page' !== $data['post_type'] ) {
		return $data;
	}
	if ( ! isset( $data['post_name'] ) || '' === $data['post_name'] ) {
		return $data;
	}
	if ( ! is_main_site() ) {
		return $data;
	}
	if ( isset( $data['post_parent'] ) && $data['post_parent'] ) {
		return $data;
	}

	$post_name = $data['post_name'];
	$c         = 0;

	while ( $c < 10 && get_id_from_blogname( $post_name ) ) {
		$post_name .= mt_rand( 1, 10 );
		$c++;
	}

	if ( $post_name !== $data['post_name'] ) {
		$data['post_name'] = $post_name;
	}

	return $data;
}