What are common pitfalls when trying to sort multi-dimensional arrays in PHP?

One common pitfall when sorting multi-dimensional arrays in PHP is not specifying the sorting criteria correctly. When sorting multi-dimensional arrays, you need to use a custom sorting function that compares the specific values you want to sort by. Another pitfall is not using the correct sorting function for multi-dimensional arrays, as the built-in sorting functions in PHP may not work as expected. 

// Example of correctly sorting a multi-dimensional array by a specific key
$multiDimArray = [
    ['name' => 'John', 'age' => 30],
    ['name' => 'Alice', 'age' => 25],
    ['name' => 'Bob', 'age' => 35]
];

usort($multiDimArray, function($a, $b) {
    return $a['age'] - $b['age'];
});

print_r($multiDimArray);

Keywords

multidimensional arrays sorting PHP array_multisort nested arrays

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