<?php
 $arrCode = array ("html ", "css ", "php ", "sql ");
 echo $arrCode[0]; //html
 echo $arrCode[3]; //sql

 $arrWarna = array();
 $arrWarna[] = "php ";
 $arrWarna[] = "html ";
 $arrWarna[] = "mysql ";
 $arrWarna[] = "css ";
 echo $arrWarna[0]; //php
 echo $arrWarna[2]; //mysql
?>