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session variable as array element for another session variable?

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In my quiz program, I'm getting the following error:

PHP Parse error:  syntax error, unexpected '' (T_ENCAPSED_AND_WHITESPACE), expecting identifier (T_STRING) or variable (T_VARIABLE) or number (T_NUM_STRING) in /~mypath~/quiz.php on line 61


I have two session variables:
question_ids is an array, and
question_pointer is an integer that is supposed to tell the program which question_ids to display.  

After each question, the question_pointer will get incremented and the next question will be displayed.

I get confused with all the single quotes (apostrophes) and double quotes (quotation marks.)

Here is the problematic line 61:

// ... (other code ) ...
 print $_SESSION["question_ids[$_SESSION['question_pointer']"]; // line 61
// ... (other code ) ...

Since learning about session variables and especially arrays as session variables, I have had a problem visualizing how to write the code to place the session variable as the array element for another session variable.  How could I do this that would work?  Thanks.


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