TwistedAsylumMC/borders.php

## borders.php
<?php
declare(strict_types=1);

if(isset($_POST["text"])){
    $text = htmlspecialchars($_POST["text"], ENT_QUOTES, "UTF-8");
    if($text === ""){
    	echo "You must enter some text<hr>";
	}else{
        $lines = preg_split('/\r\n|[\r\n]/', $text);

        $padding = (int)$_POST["padding"];
        $border = $_POST["border"];

        $chars = [
            "N" => $border === "Single" ? "─" : "═",
            "NE" => $border === "Single" ? "┐" : "╗",
            "E" => $border === "Single" ? "│" : "║",
            "SE" => $border === "Single" ? "┘" : "╝",
            "S" => $border === "Single" ? "─" : "═",
            "SW" => $border === "Single" ? "└" : "╚",
            "W" => $border === "Single" ? "│" : "║",
            "NW" => $border === "Single" ? "┌" : "╔"
        ];

        $max = max(array_map(function($line) : int{
            return strlen($line);
        }, $lines));

        echo "<pre>" . $chars["NW"] . str_repeat($chars["N"], $max + ($padding * 2)) . $chars["NE"] . PHP_EOL;
        echo str_repeat($chars["W"] . str_repeat(" ", $max + ($padding * 2)) . $chars["E"] . PHP_EOL, $padding - 2 < 0 ? 0 : $padding - 2);
        foreach($lines as $line){
        	$whitespace = ($max - strlen($line) < 0 ? 0 : (int)(($max - strlen($line)) / 2)) + $padding;
            echo $chars["W"] . str_repeat(" ", $whitespace) . $line . str_repeat(" ", ($whitespace % 2 === 0 || strlen($line) === $max ? $whitespace : $whitespace + 1)) . $chars["E"] . PHP_EOL;
        }
        echo str_repeat($chars["W"] . str_repeat(" ", $max + ($padding * 2)) . $chars["E"] . PHP_EOL, $padding - 2 < 0 ? 0 : $padding - 2);
        echo $chars["SW"] . str_repeat($chars["S"], $max + ($padding * 2)) . $chars["SE"] . PHP_EOL . "Padding: " . $padding . PHP_EOL . "Border: " . $border . PHP_EOL . "</pre><hr>";
	}
}
?>

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="UTF-8">
		<title>Border Tests</title>
	</head>
	<body>
		<form name="apply-border" action="border-test.php" method="post">
			Text: <textarea name="text"></textarea>
			<br><br>
			Padding: <input type="number" value="1" min="1" max="5" name="padding">
			<br><br>
			Single Line: <input type="radio" name="border" value="Single" checked="checked">
			<br>
			Double Line: <input type="radio" name="border" value="Double">
			<br><br>
			<button type="submit">Apply border</button>
		</form>
	</body>
</html>
	<?php
	declare(strict_types=1);

	if(isset($_POST["text"])){
	$text = htmlspecialchars($_POST["text"], ENT_QUOTES, "UTF-8");
	if($text === ""){
	echo "You must enter some text<hr>";
	}else{
	$lines = preg_split('/\r\n\|[\r\n]/', $text);

	$padding = (int)$_POST["padding"];
	$border = $_POST["border"];

	$chars = [
	"N" => $border === "Single" ? "─" : "═",
	"NE" => $border === "Single" ? "┐" : "╗",
	"E" => $border === "Single" ? "│" : "║",
	"SE" => $border === "Single" ? "┘" : "╝",
	"S" => $border === "Single" ? "─" : "═",
	"SW" => $border === "Single" ? "└" : "╚",
	"W" => $border === "Single" ? "│" : "║",
	"NW" => $border === "Single" ? "┌" : "╔"
	];

	$max = max(array_map(function($line) : int{
	return strlen($line);
	}, $lines));

	echo "<pre>" . $chars["NW"] . str_repeat($chars["N"], $max + ($padding * 2)) . $chars["NE"] . PHP_EOL;
	echo str_repeat($chars["W"] . str_repeat(" ", $max + ($padding * 2)) . $chars["E"] . PHP_EOL, $padding - 2 < 0 ? 0 : $padding - 2);
	foreach($lines as $line){
	$whitespace = ($max - strlen($line) < 0 ? 0 : (int)(($max - strlen($line)) / 2)) + $padding;
	echo $chars["W"] . str_repeat(" ", $whitespace) . $line . str_repeat(" ", ($whitespace % 2 === 0 \|\| strlen($line) === $max ? $whitespace : $whitespace + 1)) . $chars["E"] . PHP_EOL;
	}
	echo str_repeat($chars["W"] . str_repeat(" ", $max + ($padding * 2)) . $chars["E"] . PHP_EOL, $padding - 2 < 0 ? 0 : $padding - 2);
	echo $chars["SW"] . str_repeat($chars["S"], $max + ($padding * 2)) . $chars["SE"] . PHP_EOL . "Padding: " . $padding . PHP_EOL . "Border: " . $border . PHP_EOL . "</pre><hr>";
	}
	}
	?>

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<title>Border Tests</title>
	</head>
	<body>
	<form name="apply-border" action="border-test.php" method="post">
	Text: <textarea name="text"></textarea>
	<br><br>
	Padding: <input type="number" value="1" min="1" max="5" name="padding">
	<br><br>
	Single Line: <input type="radio" name="border" value="Single" checked="checked">
	<br>
	Double Line: <input type="radio" name="border" value="Double">
	<br><br>
	<button type="submit">Apply border</button>
	</form>
	</body>
	</html>