php - recursive function inside for loop -


i m trying create html in controller instead of js. there array unknown depth of arrays.

$tree = $repo->childrenhierarchy();

and function reads array , returns string of html values array elements.

 public function recursive($tree) {         $html = "";         foreach ($tree $t) {             $html = $html . '<li> <span><i class="fa fa-lg fa-minus-circle"></i>' . $t['title'] . '</span>';             if ($t['__children'] != null) {                 $html = $html . '<ul>';                 $this->recursive($t['__children']);                 $html = $html . '</ul>';             } else {                 $html = $html . '</li>';             }             return $html;         }

my problem cant hold total string because everytime function calls var html initialised, need hold string global cant figure how.

there shouldnt wrong storing value in class property while action ? 

public $html = "";   public function recursive($tree) {         foreach ($tree $t) {             $this->html = $this->html . '<li> <span><i class="fa fa-lg fa-minus-circle"></i>' . $t['title'] . '</span>';             if ($t['__children'] != null) {                 $this->html = $this->html . '<ul>';                 $this->recursive($t['__children']);                 $this->html = $this->html . '</ul>';             } else {                 $this->html = $this->html . '</li>';             }             return $this->html;         }

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