المحوّل كصفحة ويب بلغة PHP

1try {
2    echo decbin("abc");
3} catch (TypeError $error) {
4    echo $error->getMessage();
5}

decbin(): Argument #1 ($num) must be of type int, string given

1function convert(string $text, string $from): string {
2    $text = trim($text);
3    $patterns = [
4        'bin' => '/^[01]{1,32}$/',
5        'dec' => '/^[0-9]{1,9}$/',
6        'hex' => '/^[0-9A-Fa-f]{1,8}$/',
7    ];
8    if (!isset($patterns[$from]) || !preg_match($patterns[$from], $text)) {
9        return "invalid input";
10    }
11    $dec = match ($from) {
12        'bin' => bindec($text),
13        'dec' => (int)$text,
14        'hex' => hexdec($text),
15    };
16    return decbin($dec) . " " . $dec . " " . strtoupper(dechex($dec));
17}
18
19echo convert("1011", "bin"), "\n";
20echo convert("640", "dec"), "\n";
21echo convert("7f", "hex"), "\n";
22echo convert("1021", "bin"), "\n";
23echo convert("", "dec");

1011 11 B
1010000000 640 280
1111111 127 7F
invalid input
invalid input

1echo htmlspecialchars("5' x");

5' x