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

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