_get in foreach condition

[hyster]

im trying to use a $_GET variable working in the foreach condition but no matter what I try it always comes back as "invalid argument" or "unexpected $variable".

 

I tried to build a string then put it it but get the same results

$data$test

$output$data$test

 

I spent a few hours on google this but I cant find anything that has a anything but the variable for the array in the source

//$output is a json array

// works as I want it to
foreach ($output['data']['502438129'] as $item)
   {
      echo $item['mark'] . '</br>';
    }

// I get Invalid argument supplied for foreach()

$test = $_GET["account_id"];
foreach ($output['data'].$test as $item)
   {
      echo $item['mark'] . '</br>';
    }

[requinix]

Compare the two:

$output['data']['502438129']

$output['data'].$test

They don't look similar, right? You'd expect them to look similar, right?

 

If $test has the value '502438129' then simply replacing the string with the variable leads you to

$output['data'][$test]

[hansford]

I don't see the rest of your code, but your attempted access is off.

$test = $_GET["account_id"];
foreach ($output['data'][$test] as $item)
   {
      echo $item['mark'] . '</br>';
    }

[hyster]

OMG

 

[$test] is the only thing I didn't try I think :$

massive thanks guys