wpmu_validate_blog_signup

Source code

function wpmu_validate_blog_signup($blogname, $blog_title, $user = '') {

	global $wpdb, $domain, $base, $current_site;



	$blog_title = strip_tags( $blog_title );

	$blog_title = substr( $blog_title, 0, 50 );



	$errors = new WP_Error();

	$illegal_names = get_site_option( 'illegal_names' );

	if ( $illegal_names == false ) {

		$illegal_names = array( 'www', 'web', 'root', 'admin', 'main', 'invite', 'administrator' );

		add_site_option( 'illegal_names', $illegal_names );

	}



	// On sub dir installs, Some names are so illegal, only a filter can spring them from jail

	if (! is_subdomain_install() )

		$illegal_names = array_merge($illegal_names, apply_filters( 'subdirectory_reserved_names', array( 'page', 'comments', 'blog', 'files', 'feed' ) ) );



	if ( empty( $blogname ) )

		$errors->add('blogname', __('Please enter a site name'));



	if ( preg_match( '/[^a-z0-9]+/', $blogname ) )

		$errors->add('blogname', __('Only lowercase letters and numbers allowed'));



	if ( in_array( $blogname, $illegal_names ) == true )

		$errors->add('blogname',  __('That name is not allowed'));



	if ( strlen( $blogname ) < 4 && !is_super_admin() )

		$errors->add('blogname',  __('Site name must be at least 4 characters'));



	if ( strpos( ' ' . $blogname, '_' ) != false )

		$errors->add( 'blogname', __( 'Sorry, site names may not contain the character “_”!' ) );



	// do not allow users to create a blog that conflicts with a page on the main blog.

	if ( !is_subdomain_install() && $wpdb->get_var( $wpdb->prepare( "SELECT post_name FROM " . $wpdb->get_blog_prefix( $current_site->blog_id ) . "posts WHERE post_type = 'page' AND post_name = %s", $blogname ) ) )

		$errors->add( 'blogname', __( 'Sorry, you may not use that site name.' ) );



	// all numeric?

	$match = array();

	preg_match( '/[0-9]*/', $blogname, $match );

	if ( $match[0] == $blogname )

		$errors->add('blogname', __('Sorry, site names must have letters too!'));



	$blogname = apply_filters( 'newblogname', $blogname );



	$blog_title = stripslashes(  $blog_title );



	if ( empty( $blog_title ) )

		$errors->add('blog_title', __('Please enter a site title'));



	// Check if the domain/path has been used already.

	if ( is_subdomain_install() ) {

		$mydomain = $blogname . '.' . preg_replace( '|^www\.|', '', $domain );

		$path = $base;

	} else {

		$mydomain = "$domain";

		$path = $base.$blogname.'/';

	}

	if ( domain_exists($mydomain, $path) )

		$errors->add('blogname', __('Sorry, that site already exists!'));



	if ( username_exists( $blogname ) ) {

		if ( is_object( $user ) == false || ( is_object($user) && ( $user->user_login != $blogname ) ) )

			$errors->add( 'blogname', __( 'Sorry, that site is reserved!' ) );

	}



	// Has someone already signed up for this domain?

	$signup = $wpdb->get_row( $wpdb->prepare("SELECT * FROM $wpdb->signups WHERE domain = %s AND path = %s", $mydomain, $path) ); // TODO: Check email too?

	if ( ! empty($signup) ) {

		$diff = current_time( 'timestamp', true ) - mysql2date('U', $signup->registered);

		// If registered more than two days ago, cancel registration and let this signup go through.

		if ( $diff > 172800 )

			$wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->signups WHERE domain = %s AND path = %s", $mydomain, $path) );

		else

			$errors->add('blogname', __('That site is currently reserved but may be available in a couple days.'));

	}



	$result = array('domain' => $mydomain, 'path' => $path, 'blogname' => $blogname, 'blog_title' => $blog_title, 'errors' => $errors);

	return apply_filters('wpmu_validate_blog_signup', $result);

}