Tweak monolog config

bin/php-language-server.php

@@ -2,9 +2,10 @@
 
 use LanguageServer\{LanguageServer, ProtocolStreamReader, ProtocolStreamWriter};
 use Sabre\Event\Loop;
-use Symfony\Component\Debug\ErrorHandler;
 use Monolog\Logger;
 use Monolog\Handler\StreamHandler;
+use Monolog\Formatter\LineFormatter;
+use Monolog\ErrorHandler;
 
 $options = getopt('', ['tcp::', 'memory-limit::']);
 
@@ -17,11 +18,37 @@ foreach ([__DIR__ . '/../../../autoload.php', __DIR__ . '/../autoload.php', __DI
     }
 }
 
-$logger = new Logger('Errors');
-$logger->pushHandler(new StreamHandler(STDERR));
-$errorHandler = new ErrorHandler;
-$errorHandler->setDefaultLogger($logger);
-ErrorHandler::register($errorHandler);
+function errorHandler($level, $message, $file, $line) {
+    // error code is not included in error_reporting
+    if (!(error_reporting() & $level)) {
+        return;
+    }
+
+    if ($level !== E_DEPRECATED && $level !== E_USER_DEPRECATED) {
+        throw new \ErrorException($message, 0, $level, $file, $line);
+    }
+
+    fwrite(STDERR, 'Deprecation Notice: '.$message.' in '.$file.':'.$line.'</warning>');
+}
+
+function setupLogging() {
+    error_reporting(E_ALL | E_STRICT);
+    set_error_handler('errorHandler');
+
+    $formatter = new LineFormatter("[%datetime%] %level_name%: %message% %context% %extra%\n");
+    $formatter->includeStacktraces(true);
+    $formatter->ignoreEmptyContextAndExtra(true);
+
+    $handler = new StreamHandler(STDERR);
+    $handler->setFormatter($formatter);
+
+    $logger = new Logger('php language server');
+    $logger->pushHandler($handler);
+
+    ErrorHandler::register($logger, false);
+}
+
+setupLogging();
 
 @cli_set_process_title('PHP Language Server');