[pmwiki-users] Insert text only once

[Petko Yotov]

On Wednesday 15 August 2007, Richard Haven wrote:
> In one, I have some javascript that should exist only once per page in
> addition to another tag. How do I detect that the user has use (:tag
> blah:) more than once so I can omit emitting the singleton content?
>
> I am trying
>
> SDV('$Flag']), 0);
>
> global Flag;
>
> if ($Flag == 0){
>
>     $codeSnippet .= "<script type=\"text/javascript\"
> src=\https://domain.com/init.js <https://domain.com/init.js>
> \"></script>";
>
>     $Flag = 0;
>
> }
>
> Am I on the right track ?

If it is inside a function, then first declare global:

	global $Flag; // Note the "$"
	SDV($Flag, 0);// Note, you had errors above
	if($Flag == 0) { do whatever }
	$Flag = 1;

You can also use the same key in a $HTMLHeaderFmt array element:

	//no need to test for $Flag
	$HTMLHeaderFmt['init.js'] = 
		'<script type="text/javascript" src="/init.js"></script>';

This will immediately put the javascript in the header of the HTML page; if it 
is applied more than once, it still prints it once.

See http://www.pmwiki.org/wiki/PmWiki/LayoutVariables also for $HTMLFooterFmt.

Have fun,
Petko