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Posted by Toby A Inkster on 02/27/07 09:56
finer recliner wrote:
> moving the addHTML function to the very beginning of my php block does
> not change anything. I also tried moving it between the if(submit){}
> block and the $fcurrent = fopen(...); line. no change. other ideas?
Moving the *definition* of the function does not change anything. Klarth
was referring to your *use* of the addHTML() function.
Firstly, forget about the definition of addHTML(). It's not relevant.
Imagine that addHTML() is some built-in PHP function so does not need
defining.
<?php
if ($submit) {
// At this point, you call addHTML().
// addHTML() tries to read a variable called $above.
// This $above variable has not been defined yet.
$newdata = addHTML($newdata);
$fp = fopen("data.txt", "w");
fwrite($fp, $newdata);
fclose($fp);
}
$fcurrent = fopen("newpage.html", "r");
$i = 0;
while(!feof($fcurrent)){
$line = fgets($fcurrent, 4096);
// Now you define $above, but it's too late!
$above .= $line;
}
fclose($fcurrent);
?>
The solution is to re-order you code like this:
<?php
$fcurrent = fopen("newpage.html", "r");
$i = 0;
while(!feof($fcurrent)){
$line = fgets($fcurrent, 4096);
$above .= $line;
}
fclose($fcurrent);
if ($submit) {
$newdata = addHTML($newdata);
$fp = fopen("data.txt", "w");
fwrite($fp, $newdata);
fclose($fp);
}
function addHTML($text){
global $above;
$newdata = $above . $text;
return $newdata;
}//end addHTML
?>
It has nothing to do with variable scope. If you do not understand why you
were having the problem, or why the solution above works, then you
*urgently* need to purchase a good book on imperative programming
techniques and read it from start to finish.
--
Toby A Inkster BSc (Hons) ARCS
Contact Me ~ http://tobyinkster.co.uk/contact
Geek of ~ HTML/SQL/Perl/PHP/Python*/Apache/Linux
* = I'm getting there!
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