php 슬랙 slack 메세지 연동 public function _slackPostMessage( $strChannel='#channel', $strMessageText='message', $strAttachments='', $strUserName='Bot' ) { /* $attachments = '[{ "title": "테스트 내용 -----------------------------------------------------------------", "fields": [ {"value": "테스트1","short": true},{"value": "test1","short": true}, {"value": "테스트2","short": true},{"value": "test2","short": true}..