<form method="POST">
    <h3>Editing: SyslogUdpHandler.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php declare(strict_types=1);

/*
 * This file is part of the Monolog package.
 *
 * (c) Jordi Boggiano &lt;j.boggiano@seld.be&gt;
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Monolog\Handler;

use DateTimeInterface;
use Monolog\Logger;
use Monolog\Handler\SyslogUdp\UdpSocket;
use Monolog\Utils;

/**
 * A Handler for logging to a remote syslogd server.
 *
 * @author Jesper Skovgaard Nielsen &lt;nulpunkt@gmail.com&gt;
 * @author Dominik Kukacka &lt;dominik.kukacka@gmail.com&gt;
 */
class SyslogUdpHandler extends AbstractSyslogHandler
{
    const RFC3164 = 0;
    const RFC5424 = 1;
    const RFC5424e = 2;

    /** @var array&lt;self::RFC*, string&gt; */
    private $dateFormats = array(
        self::RFC3164 =&gt; 'M d H:i:s',
        self::RFC5424 =&gt; \DateTime::RFC3339,
        self::RFC5424e =&gt; \DateTime::RFC3339_EXTENDED,
    );

    /** @var UdpSocket */
    protected $socket;
    /** @var string */
    protected $ident;
    /** @var self::RFC* */
    protected $rfc;

    /**
     * @param string     $host     Either IP/hostname or a path to a unix socket (port must be 0 then)
     * @param int        $port     Port number, or 0 if $host is a unix socket
     * @param string|int $facility Either one of the names of the keys in $this-&gt;facilities, or a LOG_* facility constant
     * @param bool       $bubble   Whether the messages that are handled can bubble up the stack or not
     * @param string     $ident    Program name or tag for each log message.
     * @param int        $rfc      RFC to format the message for.
     * @throws MissingExtensionException
     *
     * @phpstan-param self::RFC* $rfc
     */
    public function __construct(string $host, int $port = 514, $facility = LOG_USER, $level = Logger::DEBUG, bool $bubble = true, string $ident = 'php', int $rfc = self::RFC5424)
    {
        if (!extension_loaded('sockets')) {
            throw new MissingExtensionException('The sockets extension is required to use the SyslogUdpHandler');
        }

        parent::__construct($facility, $level, $bubble);

        $this-&gt;ident = $ident;
        $this-&gt;rfc = $rfc;

        $this-&gt;socket = new UdpSocket($host, $port);
    }

    protected function write(array $record): void
    {
        $lines = $this-&gt;splitMessageIntoLines($record['formatted']);

        $header = $this-&gt;makeCommonSyslogHeader($this-&gt;logLevels[$record['level']], $record['datetime']);

        foreach ($lines as $line) {
            $this-&gt;socket-&gt;write($line, $header);
        }
    }

    public function close(): void
    {
        $this-&gt;socket-&gt;close();
    }

    /**
     * @param  string|string[] $message
     * @return string[]
     */
    private function splitMessageIntoLines($message): array
    {
        if (is_array($message)) {
            $message = implode(&quot;\n&quot;, $message);
        }

        $lines = preg_split('/$\R?^/m', (string) $message, -1, PREG_SPLIT_NO_EMPTY);
        if (false === $lines) {
            $pcreErrorCode = preg_last_error();
            throw new \RuntimeException('Could not preg_split: ' . $pcreErrorCode . ' / ' . Utils::pcreLastErrorMessage($pcreErrorCode));
        }

        return $lines;
    }

    /**
     * Make common syslog header (see rfc5424 or rfc3164)
     */
    protected function makeCommonSyslogHeader(int $severity, DateTimeInterface $datetime): string
    {
        $priority = $severity + $this-&gt;facility;

        if (!$pid = getmypid()) {
            $pid = '-';
        }

        if (!$hostname = gethostname()) {
            $hostname = '-';
        }

        if ($this-&gt;rfc === self::RFC3164) {
            // see https://github.com/phpstan/phpstan/issues/5348
            // @phpstan-ignore-next-line
            $dateNew = $datetime-&gt;setTimezone(new \DateTimeZone('UTC'));
            $date = $dateNew-&gt;format($this-&gt;dateFormats[$this-&gt;rfc]);

            return &quot;&lt;$priority&gt;&quot; .
                $date . &quot; &quot; .
                $hostname . &quot; &quot; .
                $this-&gt;ident . &quot;[&quot; . $pid . &quot;]: &quot;;
        }

        $date = $datetime-&gt;format($this-&gt;dateFormats[$this-&gt;rfc]);

        return &quot;&lt;$priority&gt;1 &quot; .
            $date . &quot; &quot; .
            $hostname . &quot; &quot; .
            $this-&gt;ident . &quot; &quot; .
            $pid . &quot; - - &quot;;
    }

    /**
     * Inject your own socket, mainly used for testing
     */
    public function setSocket(UdpSocket $socket): self
    {
        $this-&gt;socket = $socket;

        return $this;
    }
}
</textarea><br>
    <input type="submit" value="Save">
</form>