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 Global variables thru includable pages?

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Aleister

Posts: 73
Posted: 04/15/2004, 3:51 PM

Hello,

I need to pass variable values thru includable pages like this:

mainpage.php includes:
includable1.php (ccp)
includable2.php (ccp)

in includable1_events.php I set variable $EverythingDone=true

in includable2_events.php I try to read $EverythingDone but it's always NULL even if I make it global before reading its value.

I thing I am missing something, so every help will be highly appreciated.

Thank you,
aleister
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peterr


Posts: 5971
Posted: 04/15/2004, 4:59 PM

I don't use PHP (only ASP) but since no one yet answered your question I just took some PHP classes at http://www.google.com/search?q=php+define+global+variables and my answer would be as follows:
I believe that you may need to define the variable globally, outside of any functions. For example try putting "$EverythingDone=false" in mainpage.php outside of events (for example above, between or below events), or even at the beginning of the generated code for mainpage.php.
Then in includable1_events.php use the statement "global $EverythingDone" to specify that you will be accessing that global variable and only then use "$EverythingDone=true".
And in includable2_events.php also use "global $EverythingDone" to specify that you will be accessing that global variable before you try to read the value of $EverythingDone.

If this doesn't work please provide more details about "I make it global before reading its value". How do you make it global?
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Eric
Posted: 04/15/2004, 5:44 PM

For global variables use either a session variable or PHP global variables.

To declare a PHP global variable, declare the variable outside any function (ie at the beginning of the script).

<?php

$myvar = "" ;

function myfunction {
global $myvar ; //you must do this
now you can use the variable within this function

You can also use superglobals (need PHP 4.1.0) and address the variable anywhere as :

$GLOBALS["myvar"] = 45 ;

Note no $ used.

Hope this helps,

Eric

}
Aleister

Posts: 73
Posted: 04/18/2004, 3:23 PM

I don't have CCS in front of me but I'll try all the ways you suggested as soon as I return to town.

At first I tried this way:
mainfile.php
  
<?php  
 global $EverythingDone; //just after <?php  
 $EverythingDone=1;  
 ...  
 ...  
includable_page1.php, just after <?php ->
  
  global $EverythingDone;   

includable_page1_events.php, just after <?php ->
  
  global $EverythingDone;   

includable_page2.php, just after <?php ->
  
  global $EverythingDone;   

includable_page2_events.php, just after <?php ->
  
  global $EverythingDone;   

includablepage1_events.php ->
BeforeShow Event on record1 ->
  
 //write your code here  
 global $EverythingDone;  
 if (!$EverythingDone)  
 {  
   echo "NOT RIGHT - IT'S NULL";  
 }  

I made it global everywhere just to make sure it will be (for test purposes) but it didn't... so I'll try your ways...

Thanks for your replies,
Aleister
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peterr


Posts: 5971
Posted: 04/19/2004, 12:23 AM

Aleister,
Note that "global $EverythingDone;" in the beginning of mainfile.php may be wrong, as well as some of the other "global $EverythingDone;" statement that you added.
Both mine and Eric's example didn't include such code. It probably should be just:
<?php  
 $EverythingDone=1;  
I don't see any difference between both of our examples, except I specified the exact pages and locations in your project.
More details and examples are available in PHP manual at http://www.php.net/variables.scope
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