Global array in a function of custom snippet ?

42 Posts

zinturis Reply #1, 8 years, 8 months ago

Hi,
is it normal that I couldn't use an array in a php snippet function? I spent half a day trying to figure out. The code was working outside modx if I place it on a separate test.php and access it directly through localhost but once it is imported to the chunk and template it doesn't work. Actually, I had problems only when I tried to assign or read values inside of a function but it was working in the main file code. I ried to access rhe array in both ways as 'global $myArray' and through $GLOBALS['myArray'] but no success.
The question, is there any bug or banned global variables in modx? Did anybody experience this issue before? The code here is not authentic because I solved this by removing a function but was similar to this:

$myArray = array();

function test(){
  global $myArray; 
  $myArray[0] = 'value01'; 
}

test();

// echo $myArray[0]; // not working in modx
return $myArray[0]; // not working in modx

This is working fine in a separate php file but not in ModX and does not generate any errors. Just outputs nothing array is empty.
Any thoughts?

This question has been answered by BobRay. See the first response.

120 Posts

ferx77 Reply #2, 8 years, 8 months ago

Avoid using global. It's dangerous.
Also in modx it always checks that the function has not already been instantiated.

$myArray = array();
if (!function_exists('test')) {
    function test($myArray){
      $myArray[0] = 'value01'; 
      return $myArray;
    }
}
 
$myArray=test($myArray);

FerX - Developer at Eracom s.r.l.

discuss.answer

24,544 Posts

BobRay Reply #3, 8 years, 8 months ago

If you really want to modify the array inside the function and have the change persist outside the function, you can pass it by reference instead of using a global value.

$myArray = array();

function test(&$myArray){
  $myArray[0] = 'value01'; 
}
 
test($myArray);
 
// echo $myArray[0]; // not working in modx
return $myArray[0]; // not working in modx

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Answered Global array in a function of custom snippet ?