What are some common pitfalls when working with nested arrays in PHP?

One common pitfall when working with nested arrays in PHP is not properly accessing elements within the nested arrays. To avoid this issue, you should use nested loops or array functions like `array_walk_recursive` to traverse the nested arrays and access the desired elements. 

// Example of traversing a nested array using array_walk_recursive
$nestedArray = [
    'foo' => [
        'bar' => 'baz'
    ],
    'hello' => [
        'world' => 'nested'
    ]
];

array_walk_recursive($nestedArray, function($value, $key) {
    echo "$key: $value\n";
});

Keywords

nested arrays multidimensional arrays array functions array manipulation array access

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