rdata = new DS(); $this->rdata->keytag = $contentArray[0]; $this->rdata->algorithm = $contentArray[1]; $this->rdata->digesttype = $contentArray[2]; $this->rdata->digest = strtoupper($contentArray[3]); } /** * @param DS $rdata * @return string */ public function parseContentToApiFormat( $rdata ) { $content = [ $rdata->keytag, $rdata->algorithm, $rdata->digesttype, strtolower($rdata->digest) ]; return implode(' ', $content); } }