function _drupal_error_handler_real

Provides custom PHP error handling.

Parameters

$error_level: The level of the error raised.

$message: The error message.

$filename: The filename that the error was raised in.

$line: The line number the error was raised at.

File

core/includes/errors.inc, line 58

Code

function _drupal_error_handler_real($error_level, $message, $filename, $line) {
    if ($error_level & error_reporting()) {
        $types = drupal_error_levels();
        [
            $severity_msg,
            $severity_level,
        ] = $types[$error_level];
        $backtrace = debug_backtrace();
        $caller = Error::getLastCaller($backtrace);
        // We treat recoverable errors as fatal.
        $recoverable = $error_level == E_RECOVERABLE_ERROR;
        // As __toString() methods must not throw exceptions (recoverable errors)
        // in PHP, we allow them to trigger a fatal error by emitting a user error
        // using trigger_error().
        $to_string = $error_level == E_USER_ERROR && str_ends_with($caller['function'], '__toString()');
        _drupal_log_error([
            '%type' => isset($types[$error_level]) ? $severity_msg : 'Unknown error',
            // The standard PHP error handler considers that the error messages
            // are HTML. We mimic this behavior here.
'@message' => Markup::create(Xss::filterAdmin($message)),
            '%function' => $caller['function'],
            '%file' => $caller['file'],
            '%line' => $caller['line'],
            'severity_level' => $severity_level,
            'backtrace' => $backtrace,
            '@backtrace_string' => (new \Exception())->getTraceAsString(),
            'exception' => NULL,
        ], $recoverable || $to_string);
    }
    elseif (DRUPAL_TEST_IN_CHILD_SITE && $error_level === E_USER_DEPRECATED) {
        static $seen = [];
        if (array_search($message, $seen, TRUE) === FALSE) {
            // Only report each deprecation once. Too many headers can break some
            // Chrome and web driver testing.
            $seen[] = $message;
            $backtrace = debug_backtrace();
            $caller = Error::getLastCaller($backtrace);
            _drupal_error_header(Markup::create(Xss::filterAdmin($message)), 'User deprecated function', $caller['function'], $caller['file'], $caller['line']);
        }
    }
}