====== Conditional Replacers ======
**Autor:** Claus Szypura (update) http://phoenixmedia.de //2015/02/10 //  \\

This makes it possible to show or hide code in dependance of having content or not. If no content no code is generated\\
//This way our source code remains clean an will not be "polluted" by any empty and unneccessary stuff.//

===== The Principle =====

to make it happen, there are some BasicWrapper
An example by Oliver: [[http://forum.phpwcms.org/viewtopic.php?f=16&t=24605&start=15|Forum]]\\
<code html>

        <header>
            <nav>{NAV_LIST_UL:BP}</nav>
    [HEADER]
            <section class="header-content">{HEADER}</section>
    [/HEADER]
        </header>
        <div class"main[LEFT] has-marginal-left[/LEFT][RIGHT] has-marginal-right[/RIGHT]">
    [LEFT]
            <section class="col-left">{LEFT}</section>
    [/LEFT]
            <article>
                {CONTENT}
            </article>
    [RIGHT]
            <section class="col-left">{RIGHT}</section>
    [/RIGHT]
        </div>
        <footer>
            <p>&copy; 2015 Whatever</p>
    [FOOTER]
            <section class="footer-content">{FOOTER}</section>
    [/FOOTER]
        </footer>

</code>

===== This also counts for CUSTOM_BLOCKS =====

simple
<code html>
[BLOCK]<tag>{BLOCK}</tag>[/BLOCK]
[BLOCK_ELSE]<tag>och nö, fehlt</tag>[/BLOCK_ELSE]
</code>

nested
<code html>
[BLOCK_ELSE][RIGHT]<tag>{RIGHT}</tag>[/RIGHT][/BLOCK_ELSE]
</code>

===== Want some examples? =====
==== LEFT visible? ====

really? Here is the first, very simple (corrected by Oliver ;) )\\
<code html>
[LEFT]
    <div class="col-md-3">
        {LEFT}
    </div>
[/LEFT ]
    <div class="col-md-[LEFT]9[/LEFT][LEFT_ELSE]12[/LEFT_ELSE]">
        {CONTENT}
    </div>
</code>
What does it do? Right what it should: in case {LEFT} has no content the main content will expand to 12 columns. Otherwise there is a column 3 and column 9 (bootstrap)



==== LEVEL1_ID visible? ====
by Oliver [[forum.phpwcms.org/viewtopic.php?f=16&t=24638|Forum]]
<code html>
[LEFT]
    <div class="col-md-3">
        [LEVEL1_ID]{NAV_LIST_UL: F,  {LEVEL1_ID} , , act_path , active } [/LEVEL1_ID]
        {LEFT}
    </div>
[/LEFT ]
    <div class="col-md-[LEFT]9[/LEFT][LEFT_ELSE]12[/LEFT_ELSE]">
        {CONTENT}
    </div>
</code>

==== Level there? ====
<code>
[IF_CAT:28,29,30]<!-- whatever -->[/IF_CAT]
[IF_NOTCAT:0,1,2]<!-- whatever -->[/IF_NOTCAT]
</code>