Question

How to convert a character (flatten) matrix to a single string in PHP

Answer 1

function flattenMatrix(array $matrix): string {
    $result = '';

    foreach ($matrix as $row) {
        foreach ($row as $ch) {
            $result .= $ch;
        }
    }

    return $result;
}

$matrix = [
    ['H','e','l','l','o'],
    [' ','W','o','r','l','d'],
    ['!']
];

$output = flattenMatrix($matrix);

echo "Flattened string: $output\n";



/*
run:

Flattened string: Hello World!

*/

 

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