ZEND PHP 5 Certification STUDY GUIDE

180 ” Elements of Object-oriented Design
interface SeekableIterator {
function current();
function next();
function rewind();
function key();
function valid();
function seek($index);
}
Recursive Iteration
Recursive Iteration allows looping over multi-dimensional tree-like data structures.
SimpleXML, for example, uses recursive iteration to allow looping through complex
XML document trees.
To understand how this works, consider the following complex array:
$company = array(
array("Acme Anvil Co."),
array(
array(
"Human Resources",
array(
"Tom",
"Dick",
"Harry"
)
),
array(
"Accounting",
array(
"Zoe",
"Duncan",
"Jack",
"Jane"
)
)
)
);
Licensed to 482634 - Amber Barrow (itsadmin@deakin.edu.au)
Our goal is to print out something like this: