What are common pitfalls when trying to sort arrays in PHP based on multiple columns?

When sorting arrays in PHP based on multiple columns, a common pitfall is not considering the correct order of sorting for each column. To solve this, you can use `array_multisort()` function with the columns you want to sort by as arguments, ensuring the correct order of sorting for each column. 

// Sample array to be sorted based on multiple columns
$data = [
    ['name' => 'John', 'age' => 30],
    ['name' => 'Alice', 'age' => 25],
    ['name' => 'Bob', 'age' => 35],
];

// Sort the array first by name in ascending order, then by age in descending order
array_multisort(array_column($data, 'name'), SORT_ASC, array_column($data, 'age'), SORT_DESC, $data);

// Output the sorted array
print_r($data);

Keywords

array sorting multi-column sorting usort array_multisort sorting algorithms

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