一直失败，老师我是哪里错了吗？
function insert($table, $array) {
$keys = join ( ",", array_keys ( $array ) );
$vals = "'" . join ( "','", array_values ( $array ) ) . "'";
$sql = "insert {$table}($keys) values({$vals})";
mysql_query($sql);
return mysql_insert_id();
}
