如何循环遍历这个数组？

Question

I have this array where the first two elements are integers and the third element is another array containing 2 arrays, each with one element. I can loop through the first 2 elements fine but not the third element.

I have tried using a second foreach loop and also a for loop containing a foreach loop.

$rows  =  array(1, 2, "qa" => array("q" => array(1,2), "b" => array(3,4)));
$f=1;

foreach($rows as $r) {
   if($f == 1){
      $e = $rows[0];
      $f=$f+1;
   }
   if($f == 2){
      $u = $rows[1];
   }
   if($r == "qa"){
      $c = $value["q"];
      $d = $value["b"];

   }    
} 

echo $e;
echo $u;
print_r($c);
print_r($d);

Answer 1

I hope this helps:

$rows  =  array(1, 2, "qa" => array("q" => array(1,2), "b" => array(3,4)));
view($rows);
function view($arr) {
    foreach ($arr as $value) {
        if (is_array($value))
            view($value);
        else
            echo $value;
    }
}

Answer 2

You could use array_walk_recursive

array_walk_recursive($rows, function($v){echo $v;});

DEMO: https://3v4l.org/ITXAu