- $csv = trim( `getmac /NH /FO CSV` );
- $line = substr( $csv, 0, strcspn( $csv, "\n" ) );
- $info = str_getcsv( $line );
- $nodeId = count( $info ) ? str_replace( '-', '', $info[0] ) : '';
+ $csv = trim( wfShellExec( 'getmac /NH /FO CSV' ) );
+ $line = substr( $csv, 0, strcspn( $csv, "\n" ) );
+ $info = str_getcsv( $line );
+ $nodeId = isset( $info[0] ) ? str_replace( '-', '', $info[0] ) : '';