function LogMessageParser::parseMessagePlaceholders

Overrides LogMessageParserInterface::parseMessagePlaceholders

File

core/lib/Drupal/Core/Logger/LogMessageParser.php, line 13

Class

LogMessageParser

Parses log messages and their placeholders.

Namespace

Code

public function parseMessagePlaceholders(&$message, array &$context) {
    $variables = [];
    $has_psr3 = FALSE;
    if (($start = strpos($message, '{')) !== FALSE && strpos($message, '}') > $start) {
        $has_psr3 = TRUE;
        // Transform PSR3 style messages containing placeholders to
        // \Drupal\Component\Render\FormattableMarkup style.
        $message = preg_replace('/\\{([^\\{}]*)\\}/U', '@$1', $message);
    }
    foreach ($context as $key => $variable) {
        // PSR3 style placeholders.
        if ($has_psr3) {
            // Keys are not prefixed with anything according to PSR3 specs.
            // If the message is "User {username} created" the variable key will be
            // just "username".
            if (str_contains($message, '@' . $key)) {
                $key = '@' . $key;
            }
        }
        // To be considered a valid placeholder, the key should be in
        // \Drupal\Component\Render\FormattableMarkup style and the variable
        // should be a string, number, or \Stringable object. For historical
        // reasons, Boolean and NULL placeholders are also allowed; NULL
        // placeholders are deprecated and may throw an error in the future.
        // @see https://www.drupal.org/node/3318826
        if (!empty($key) && ($key[0] === '@' || $key[0] === '%' || $key[0] === ':')) {
            if (is_scalar($variable) || is_null($variable) || $variable instanceof \Stringable) {
                $variables[$key] = $variable;
            }
        }
    }
    return $variables;
}