php中的变量变量和mysql_result

this is my problem:

echo "SELECT * FROM fornitori_elatos WHERE NomeFornitore = '".${mysql_result($elenco_fornitori,$k,"NomeFornitore")}."';";

generate this error:

PHP Fatal error:Function name must be a string

can you help me?

Try this

echo "SELECT * FROM fornitori_elatos WHERE NomeFornitore = '".mysql_result($elenco_fornitori,$k,"NomeFornitore")."';";