利用規約の変換.php

<?php

declare(strict_types=1);

$rawText = file_get_contents("a.txt");
$arrayText = explode("\r\n", $rawText);

//echo "<h3>Raw Text</h3>";
//echo "<pre>" . $rawText . "</pre>";

$replacedArrayText = [];

foreach ($arrayText as $row => $text) {
    var_dump($text);
    echo "<br>";
    $replacedArrayText[$row] = "\r\n";
    if ($row === 0) {
        //1行目
        $replacedArrayText[$row] .= "<h1>" . $text . "</h1>";
        continue;
    }
    if (preg_match('/(第\d+条)/', $text) === 1) {
        //第〇条
        $replacedArrayText[$row] .= "<h2>" . $text . "</h2>";
        continue;
    }
    if (preg_match('/( *1\.)/', $text) === 1) {
        //リストの開始
        $replacedArrayText[$row] .= "<ol>" . $text;
        $nestSpace = "";
        preg_match('/([ ]*)/', $text, $nestSpace);
        for ($i = $row; $i < count($replacedArrayText) - 1; $i++) {
            //次の要素
            if (preg_match('/(' . $nestSpace . ')/', $replacedArrayText[$i + 1]) === 0) {
                //最終要素である
                $replacedArrayText[$i] = $replacedArrayText[$i] . "</ol>";
                break;
            }
            //ここわからん
        }
        continue;
    }
    if ($text !== "") {
        //通常の文字列
        //$replacedArrayText[$row] .= "<p>" . $text . "</p>";
        $replacedArrayText[$row] = $text;
        continue;
    }
    $replacedArrayText[$row] .= $text . "<br>";
}

//echo "<h3>Replaced Text</h3>";
$result = implode("", $replacedArrayText);
echo '<textarea rows="500" cols="500">' . $result . '</textarea>';