[PHP-NOTES] note 130423 added to function.array-map

<?php 

function highAndLow(string $numbers): string {

    // Split the input string into an array using spaces as delimiter
    // Then filter out any non-numeric values
    $numbers = array_filter(explode(" ", $numbers), 'is_numeric');

    // Convert the remaining numeric strings to integers
    $ints = array_map('intval', $numbers);

    // Return the highest and lowest numbers, separated by a space
    return max($ints) . " " . min($ints);
}

// Example usage: will output "388 2"
echo(highAndLow(' 2 388  asdfgh 4'));

?>
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