php - Combine Multiple Foreach Results To One Variable String -

i have multiple foreach loops below, , i'm trying join 1 set of data inside 1 foreach, set of data in other foreach, can create 1 main variable post anywhere on page these values. thought way had setup below work, it's not. suggestions?

the variables have setup right now, data need collect $variable

foreach($result $row) {     $sections[$row['section_id']][$row['question_id']] = $row; }  foreach ($sections $key => $section) {     $question_keys = array_keys($section);     foreach ($question_keys $question_key) {         if ($section[$question_key]["selection"] == 2) {          } else {             $variable .= '<div id="section-title">'.$section_details[$key].'</div>';             foreach ($section $key => $questions) {                 $variable .= '<div id="section-desc">                 <div>'.$question_details[$key]["title"].'</div>                 <div>'.$question_details[$key]["desc"].'</div>                        <div>'.$selection_details[$questions["selection"]].'</div></div>';             }         }        } } 

the first $variable assigned section. sections nest questions. there can multiple sections nesting questions belong it. second $variable assigned questions nested underneath section. questions can multiple.


array output at $section level

array ( [2] => array     (         [assessment_selection_id] => 97         [assessment_id] => 32         [section_id] => 2         [question_id] => 2         [selection] => 1         [timestamp] => 1368183565     )  [1] => array     (         [assessment_selection_id] => 98         [assessment_id] => 32         [section_id] => 2         [question_id] => 1         [selection] => 3         [timestamp] => 1368183580     )  ) 

first of define $variable outside foreach loop. there issue looks inside structure of string assigning the $variable contains html elements, might not getting seen on browser.