Are there any specific PHP array functions that are particularly useful for working with matrices?

When working with matrices in PHP, the `array_map()` function can be particularly useful for applying a callback function to each element of the matrix. This can be helpful for performing operations on each element of the matrix or transforming the matrix in some way. 

// Define a matrix
$matrix = [
    [1, 2, 3],
    [4, 5, 6],
    [7, 8, 9]
];

// Define a callback function to square each element
function square($num) {
    return $num * $num;
}

// Apply the callback function to each element of the matrix
$squaredMatrix = array_map(function($row) {
    return array_map('square', $row);
}, $matrix);

// Output the squared matrix
print_r($squaredMatrix);

Keywords

PHP array functions matrices multidimensional arrays manipulation

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