echo "기본함수";basic("가", "나");function basic($p1, $p2){ echo $p1.$p2;}echo "참조전달";// 참조 전달$j = 10;ref($j);function ref(&$p1){ $p1 = $p1 + 1;}echo $j;echo "참조 리턴";// 참조 리턴function &rtnref(){ return "Hello Me";}$funvar = &rtnref();function depth1($pfunvar){ return "1dep : ".$pfunvar;}echo depth1($funvar);echo "배열 리턴";$a = rtnArr();function rtnArr(){ return array(1, 2, 3);}foreach ($a as &$i){ echo "..