Accessing nested associative array using array_keys (PHP)

Question

I'm trying to access a nested associative array:

$data = array('1'=>'value1','2'=>'value2','3'=>array('one','two'))

The value of the key '3' is an array.

Since I need to cycle my values, I extracted the keys of given array:

$keys = array_keys($data);

and used to get the associated value with:

foreach(range(1, 10) as $val):
 echo "key: ".$keys[$val]; 
 echo "value: ".$data[$keys[$val]]; 
endforeach;

Now I would like to access the values related to '3'. Using $data[$keys[$val]] won't work cause I get back an array, not a value.

My question is: how can I access, for example to the value 'one' using a syntax close to $data[$keys[$val]] ?

Is there a specific reason for how you iterate the array? A simple foreach($data as $key => $value) {} would achieve the same result. — Yoshi
– Yoshi, Commented Nov 15, 2017 at 14:00

Ofir Baruch · Accepted Answer · 2017-11-15 13:55:14Z

1

You should add a condition to check if the value is a string or an array. If it's a string - simply echo it, otherwise - access the first value in that array (key = 0, will print 'one') or use another foreach loop to access all of those array's values.

foreach(range(1, 10) as $val):
 echo "key: ".$keys[$val]; 
 echo "value: ";
 if(is_array($data[$keys[$val]])){ //Is it an array?

  //echo 'one'
  echo $data[$keys[$val]][0];

  //or all the values with a loop
  foreach($data[$keys[$val]] as $val2){
   echo $val2;
   echo ",";
  }


 } else { //it's not an array, we can simply echo it.
  echo $data[$keys[$val]];
 }
endforeach;

answered Nov 15, 2017 at 13:55

Ofir Baruch

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