How can the use of array_multisort in PHP be optimized for sorting multidimensional arrays?

When sorting multidimensional arrays using array_multisort in PHP, it is important to optimize the sorting process for better performance. One way to do this is by transposing the array before sorting, as array_multisort works better with transposed arrays. This means converting rows to columns and vice versa, so that the sorting operation can be more efficient. 

// Sample multidimensional array
$multiArray = [
    [3, 7, 2],
    [1, 4, 6],
    [5, 9, 8]
];

// Transpose the array
$transposedArray = array_map(null, ...$multiArray);

// Sort the transposed array
array_multisort($transposedArray[0], SORT_ASC, $transposedArray[1], SORT_ASC, $transposedArray[2], SORT_ASC);

// Transpose the sorted array back
$sortedMultiArray = array_map(null, ...$transposedArray);

// Output the sorted multidimensional array
print_r($sortedMultiArray);

Keywords

array_multisort multidimensional arrays optimization sorting PHP

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