yii\web\ErrorHandler::argumentsToString PHP Method

    public function argumentsToString($args)
    {
        $count = 0;
        $isAssoc = $args !== array_values($args);
        foreach ($args as $key => $value) {
            $count++;
            if ($count >= 5) {
                if ($count > 5) {
                    unset($args[$key]);
                } else {
                    $args[$key] = '...';
                }
                continue;
            }
            if (is_object($value)) {
                $args[$key] = '<span class="title">' . $this->htmlEncode(get_class($value)) . '</span>';
            } elseif (is_bool($value)) {
                $args[$key] = '<span class="keyword">' . ($value ? 'true' : 'false') . '</span>';
            } elseif (is_string($value)) {
                $fullValue = $this->htmlEncode($value);
                if (mb_strlen($value, 'UTF-8') > 32) {
                    $displayValue = $this->htmlEncode(mb_substr($value, 0, 32, 'UTF-8')) . '...';
                    $args[$key] = "<span class=\"string\" title=\"{$fullValue}\">'{$displayValue}'</span>";
                } else {
                    $args[$key] = "<span class=\"string\">'{$fullValue}'</span>";
                }
            } elseif (is_array($value)) {
                $args[$key] = '[' . $this->argumentsToString($value) . ']';
            } elseif ($value === null) {
                $args[$key] = '<span class="keyword">null</span>';
            } elseif (is_resource($value)) {
                $args[$key] = '<span class="keyword">resource</span>';
            } else {
                $args[$key] = '<span class="number">' . $value . '</span>';
            }
            if (is_string($key)) {
                $args[$key] = '<span class="string">\'' . $this->htmlEncode($key) . "'</span> => {$args[$key]}";
            } elseif ($isAssoc) {
                $args[$key] = "<span class=\"number\">{$key}</span> => {$args[$key]}";
            }
        }
        return implode(', ', $args);
    }