| 8.10 Functions | |
There are several kinds of Vortex functions:
- Script functions
Functions written in the script itself, declared with <A nbsp;NAME=name> tags. These are called with named parameters, can modify global variables, and may or may not set $ret . - Library functions
The same as script functions, but stored in the library. We'll discuss them in the section on Vortex nbsp;Library nbsp;Modules . - Builtin functions
Functions inherent to Vortex, such as <fmt> and <sum> . Some builtin functions can have start and end tags, and act as loops, such as <rex> . Builtin functions have a mix of named and unnamed parameters, and only set $ret and other special variables. Builtin functions are always PRIVATE . - User functions
These are C functions written and linked into the Vortex executable, and callable from Vortex. They only affect $ret , always have unnamed parameters, and are always PRIVATE .
Calling
Vortex functions are called in one of two ways:- From inside the script with a tag name, such as <main> .
- As the entry function (start point) from the URL, eg. http://www.mysite.com/cgi-bin/texis/example/main.html .
Functions have parameters and a specific scope, discussed below.
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