ZEND PHP 5 Certification STUDY GUIDE

Functions ” 45
Summary
Functions are one of the most often used components of the PHP language (or, for
that matter, of any language). Without them, it would be virtually impossible to write
reusable code—or even use object-oriented programming techniques.
For this reason, you should be well versed not only in the basics of function declaration,
but also in the slightly less obvious implications of elements like passing
arguments by reference and handling variable-length argument lists. The exam features
a number of questions centered around a solid understanding of how functions
work—luckily, these concepts are relatively simple and easy to grasp, as illustrated in
this chapter.
Licensed to 482634 - Amber Barrow (itsadmin@deakin.edu.au)