[RESOLVED] What Am I Doing Wrong Here?? Function Problem?

hotwire

Hi, I am trying to read a folder that contains images. The images are read into an array. The problem is when I attempt to call the function, (myfunction) in the code, the $x variable will not increment and sets back to 1 everytime it calls the function..😕

I use a do while loop to call the function as long as the $x is <50. The images will print 4 accross as I want them to, but they repeat the same 4 images because the $x is not incrementing.. Does this has something to do with calling functions that kills variables?

Thanks for any help on this.. My code is below: (shortened from original)

<?php

$x=1;

function picReload()
{

++$x;

echo $x;

do 
{
sleep(2);
picReload(); 
}
while ($x<50);
}

picReload();

?>

laserlight

The problem is when I attempt to call the function, (myfunction) in the code, the $x variable will not increment and sets back to 1 everytime it calls the function.

The lifetime of a local variable is limited to the function call.

For starters, please indent your code, use a more descriptive function name, and use ++$x to increment $x instead of $x=(++$x).

hotwire

Hi laserlight. Yeah I tried both combinations of the increment methods $x++ and ++$x without the parens.

Is there a way to increment the $x variable without reloading the page?

laserlight

Yeah I tried both combinations of the increment methods $x++ and ++$x without the parens.

Just write:

++$x;

It is tough to determine what exactly:

$x = ++$x;

means, and in some programming languages the result is undefined.

Is there a way to increment the $x variable without reloading the page?

Instead of using recursion, use a loop. It can be done with recursion, of course, but a loop is simpler and more efficient anyway.

hotwire

Thanks laserlight.. I rewrote my confusing code with a shorter example to understand.

Now does this mean I need to scrap using the FUNCTION for this code since the variable will not hold when calling the function?

laserlight

Now does this mean I need to scrap using the FUNCTION for this code since the variable will not hold when calling the function?

No, you can still use the function. $x is reset to 1 everytime the function is called, but this is fine. Just change the recursion into iteration.

hotwire

Thanks alot laser. Ima see if I can get a few examples on using the iteration method..

Thanks.