Extracting values from multidimensional array where keys are dynamically generated

Question

I have an array

$array1 = Array (
       [a1] => Array  (
               [a_name] => aaaaa
               [a_value] => aaa
             )

       [b1] => Array (
               [b_name] => bbbbb
               [b_value] => bbb
           )
       [c1] => Array (
               [c_name] => ccccc
               [c_value] => ccc
           )

     )

Now I want to extract the value of $array1[b1][b_name]. But the thing here is the keys (b1 and b_name) will be generated dynamically. The situation here is I have a multidimensional array and the keys of which i want the value. So how do i get the value.

eg.

$array1[b1][b_name]

should return

bbbbb

and

$array1[c1]

should return

array([c_name]=>ccccc
       [c_value]=>ccc
   )

and so on...

EDIT

Lets keep it this way, The second array is

$array2 = Array (
         [b1] => Array (
               [b_name]=> zzzzz
             )
      )

Now Intersecting $array1 and $array2, I want the value of the $array1 ie. bbbbb

Vinay · Accepted Answer · 2012-08-29 06:08:28Z

4

Try this

<?php
   //you will have $firstkey and $secondkey as index values of $array1
   if (isset($firstkey) && array_key_exists($firstkey, $array1)) {
       if (isset($secondkey) && array_key_exists($secondkey, $array1[$firstkey])) {
           print_r($array1[$firstkey][$secondkey]);
       }
       else {
           print_r($array1[$firstkey]);
           echo "$secondkey does not exist";           
       }
   }
   else {
       echo "$firstkey does not exist";
   }
?>

answered Aug 29, 2012 at 6:08

Vinay

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Comments

Fluffeh · Accepted Answer · 2012-08-29 05:53:17Z

0

You can use a foreach loop to get at both the keys and the values. I am not certain though that it will help you if you only want specific ones and you don't know how to identify them:

foreach ($array1 as $key => $value) {
    echo "Key: $key; Value: $value<br />\n";
}

// From your example of the array inside a1:
// the $key would be: a_name
// the $value would be: aaaaa

answered Aug 29, 2012 at 5:53

Fluffeh

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