What best practices should be followed when working with arrays in PHP, especially in the context of complex data structures?

When working with arrays in PHP, especially in the context of complex data structures, it is important to follow best practices to ensure efficient and maintainable code. One key practice is to properly document the structure of the array, including the data types of each element. Additionally, using meaningful keys and variable names can make the code more readable and easier to work with. Lastly, consider using functions like array_map, array_filter, and array_reduce to manipulate arrays in a more functional programming style. 

// Example of using array_map to transform an array of numbers
$numbers = [1, 2, 3, 4, 5];
$transformedNumbers = array_map(function($num) {
    return $num * 2;
}, $numbers);
print_r($transformedNumbers);

Keywords

arrays data structures PHP functions complex best practices

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