What Approaches Can You Use to Process Nested Arrays in PHP (Recursive or Iterative)?

PHP foreach with Nested Array: Recursive Approach

Nested arrays can be a challenge to work with in PHP. Consider an array where you want to access a specific nested array, such as the second element of the main array.

The problem can be solved using a nested loop approach:

<code class="php">foreach ($tmpArray as $innerArray) {
  if (is_array($innerArray)) {
    foreach ($innerArray as $value) {
      echo $value;
    }
  } else {
    // handle non-array elements
  }
}</code>

This approach assumes you know the depth of nested arrays. If you don't, recursion can be used:

<code class="php">function displayArrayRecursively($arr, $indent='') {
  if ($arr) {
    foreach ($arr as $value) {
      if (is_array($value)) {
        displayArrayRecursively($value, $indent . '--');
      } else {
        // output value
      }
    }
  }
}</code>

To retrieve the third level nested array, use this code:

<code class="php">foreach ($tmpArray as $inner) {
  if (is_array($inner)) {
    foreach ($inner[1] as $value) {
      echo "$value \n";
    }
  }
}</code>

These approaches provide various options for handling nested arrays, depending on the specific requirements of your code.

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