Question

How to format an array of strings in lines with maxWidth without breaking the words in PHP

Answer 1

function formatLines(array $words, int $maxWidth): array {
    $result = [];
    $currentLine = "";
    $currentLength = 0;

    foreach ($words as $word) {
        $wordLen = strlen($word);

        // If adding this word exceeds maxWidth, push current line
        if ($currentLength + ($currentLine === "" ? 0 : 1) + $wordLen > $maxWidth) {
            if ($currentLine !== "") {
                $result[] = $currentLine;
            }
            $currentLine = $word;
            $currentLength = $wordLen;
        } else {
            if ($currentLine !== "") {
                $currentLine .= " ";
                $currentLength++;
            }
            $currentLine .= $word;
            $currentLength += $wordLen;
        }
    }

    // Push the last line if not empty
    if ($currentLine !== "") {
        $result[] = $currentLine;
    }

    return $result;
}

function main() {
    $words = ["This", "is", "a", "programming", "example", "of", "text", "wrapping"];
    $maxWidth = 12;

    $lines = formatLines($words, $maxWidth);

    foreach ($lines as $line) {
        echo "\"$line\"\n";
    }
}

main();



/*
run:

"This is a"
"programming"
"example of"
"text"
"wrapping"

*/

 

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