To understand an array in PHP when given the other variable in the array

Question

Please, see Cha\'s answer where we are pretty close the final solution. We are debugging the code with these data

1. database in PostgreSQL
2. test sql-quer

Answer 1

If you want to add more information about each question, you can simply add to $end_array[1]. This is the array my first foreach statement creates:

// The end result turns out to be something like this:
    array(
          1 => array(
                       'tags' => array(
                                      0 => "php",
                                      1 => "sql"),
                    )
         );

---

and the code in the question initially

    // Go through each Tag
    while( $tags_and_Qid = pg_fetch_array( $result_tags )) {
        // Add the Tag to an array of tags for that question
        $end_array [ $tags_and_Qid['question_id'] ] ['tag'] [] = $tags_and_Qid['tag'];
    }

    // First compile the Data
    // Go through each question

    while( $titles_and_Qid = pg_fetch_array( $result_titles ) ) {
        echo ("
"
                . $titles_and_Qid['title']
                  // Problem here!
                  // How can you print the titles such that 
                  // they are assigned to each tag -set?
            );

        $i = 0;
        // Then Loop Through each question
        foreach( $end_array as $tags_and_Qid['question_id'] => $tags_and_Qid['tag'] )
        {

        echo ("\n\nITERATION NUMBER IS " . $i);      // The code is buggy here
                    // For instance, we get 9 iterations for 3 questions

        // Create the starting HTML
        echo ("
");
            // Go through each tag

        // not sure about this
                foreach( $end_array[$tags_and_Qid['question_id']] ['tag'] as $tag )

                {
                    echo ( ""
                        . $tag
                    . ""
                    );
                }
        // end the html
            echo '
';

        $i++; 
        }
        echo ("
");
    }

    // to end the list of questions
    echo ("