PHP Functions Essential Reference

Overview

This chapter contains functions for the following tasks:

• Working with constants

constant() Returning the value of a constant

define() Defining a named constant

defined() Checking whether a given named constant exists

• Ending script execution

die() Outputting a message and terminating the current script

exit() Terminating the current script

• Evaluating strings as PHP code

eval() Evaluating a string as PHP code

• Retrieving information about the capabilities of a browser

get_browser() Telling what the user’s browser is capable of

• Performing syntax highlighting for PHP

highlight_file() Syntax highlighting of a file

highlight_string() Syntax highlighting of a string

show_source() Syntax highlighting of a file

• Parsing IPTC blocks