После AJAX проверки выдаёт всё время цифру "1". - CommunityBuilder

		function fieldClass( &$field, &$user, &$postdata, $reason ) {
		global $_CB_framework, $_CB_database, $ueConfig, $_GET;

		parent::fieldClass( $field, $user, $postdata, $reason );		// performs spoofcheck.

		$html					=	null;
		$function				=	cbGetParam( $_GET, 'function', '' );
		if ( $function == 'checkvalue' ) {
			$username			=	stripslashes( cbGetParam( $postdata, 'value', '' ) );
			$usernameISO		=	utf8ToISO( $username );			// AJAX sends in utf8, we need to convert back to the site's encoding.
	
			$function			=	'testnotexists';
			if ( ( ( $ueConfig['reg_username_checker'] == 1 ) || ( $_CB_framework->getUi() == 2 ) )
				&& ( ( $reason == 'edit' ) || ( $reason == 'register' ) ) )
			{
				if ( ( ! $user ) || ( $usernameISO != $user->username ) ) {

					if ( ! $this->validate( $field, $user, 'username', $usernameISO, $postdata, $reason ) ) {
						global $_PLUGINS;
						$html			=	'<span class="cb_result_error">' . $_PLUGINS->getErrorMSG( '<br />' ). '</span>';
					} else {
						if ( $_CB_database->isDbCollationCaseInsensitive() ) {
							$query	=	"SELECT COUNT(*) AS result FROM #__users WHERE username = " . $_CB_database->Quote( ( trim( $usernameISO ) ) );
						} else {
							$query	=	"SELECT COUNT(*) AS result FROM #__users WHERE LOWER(username) = " . $_CB_database->Quote( ( strtolower( trim( $usernameISO ) ) ) );
						}
						$_CB_database->setQuery($query);
						$dataObj			=	null;
						if ( $_CB_database->loadObject( $dataObj ) ) {
							if ( $dataObj->result ) {
								// funily, the output does not need to be UTF8 again:
								if ( $function == 'testexists' ) {
									$html	=	( '<span class="cb_result_ok">' . sprintf( ISOtoUtf8( _UE_USERNAME_EXISTS_ON_SITE ), htmlspecialchars( $username ) ). '</span>' );
								} else {
									$html	=	( '<span class="cb_result_error">' . sprintf( ISOtoUtf8( _UE_USERNAME_ALREADY_EXISTS ), htmlspecialchars( $username ) ). '</span>' );
								}
							} else {
								if ( $function == 'testexists' ) {
									$html	=	( '<span class="cb_result_error">' . sprintf( ISOtoUtf8( _UE_USERNAME_DOES_NOT_EXISTS_ON_SITE ), htmlspecialchars( $username ) ). '</span>' );
								} else {
									if ( $reason == 'register' ) {
										$html	=	( '<span class="cb_result_ok">' . sprintf( ISOtoUtf8( _UE_USERNAME_DOESNT_EXISTS ), htmlspecialchars( $username ) ). '</span>' );
									} else {
										$html	=	( '<span class="cb_result_ok">' . sprintf( ISOtoUtf8( _UE_USERNAME_FREE_OK_TO_PROCEED ), htmlspecialchars( $username ) ). '</span>' );
									}
								}
							}
						} else {
							$html			=	( '<span class="cb_result_error">' . ISOtoUtf8( _UE_SEARCH_ERROR ). ' !' . '</span>' );
						}
					}
				} else {
					if ( $user && ( $user->id == $_CB_framework->myId() ) ) {
						$html			=	( '<span class="cb_result_ok">' . sprintf( ISOtoUtf8( _UE_THIS_IS_YOUR_USERNAME ), htmlspecialchars( $username ) ). '</span>' );
					} else {
						$html			=	( '<span class="cb_result_ok">' . sprintf( ISOtoUtf8( _UE_THIS_IS_USERS_USERNAME ), htmlspecialchars( $username ) ). '</span>' );
					}
				}
			} else {
				$html					=	ISOtoUtf8( _UE_NOT_AUTHORIZED );
			}
		}
		return $html;
	}