HTP

htp on-line reference : IF, ELSEIF, ELSE, /IF

Table of Contents
  Introduction
  License
  Tutorial
  Usage
  HTP Tags
    ALTTEXT
    BLOCK
    BLOCKDEF
    DEF
    FILE
  > IF
    INC
    IMG
    IMAGEURL
    OPT
    OUTPUT
    QUOTE
    SET
    UNDEF
    UNSET
    USE, $
    WHILE
    <!---
  History
  Wish list
  Bugs

syntax

<[ref]IF [NOT] conditional>
    block #1
[
<ELSEIF [NOT] conditional>
    block #2
...
]
[
<ELSE>
    block #3
]
<[ref]/IF>

synopsis

IF, NOT, ELSEIF, ELSE, and /IF are the building blocks for conditional processing. The basic form is shown above.

"Conditional" is either a "compare" or "is defined" operation. A compare operator is a test of the value of a macro against a literal string:

    <[ref]IF name="Jim">...<[ref]/IF>

and a defined operator is a test of a macro's existance:

    <[ref]IF name>...<[ref]/IF>

If the NOT tag is present in the IF markup, the evaluation of the conditional is reversed. The first IF or ELSEIF condition that evaluates to true is chosen. If none of the conditions is true the ELSE block is taken if it is present. A conditional block must be closed with the /IF tag. IF tags can be nested.

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htp on-line reference / http://htp.sourceforge.net/ref/
Authors: Jim Nelson, Jochen Hoenicke, Michael Möller.
Maintainers: Jochen Hoenicke.

Copyright © 1995-96 Jim Nelson.
Copyright © 2001-2003 Jochen Hoenicke.
Permission to reproduce and distribute this hypertext document granted according to terms described in the License section.

last updated Tue Feb 22, 2011