Cml\Vendor\Http::getHeaderInfo PHP Method

getHeaderInfo() public static method

显示HTTP Header 信息
public static getHeaderInfo ( string $header = '', boolean $echo = true ) : string
$header string
$echo boolean
return string
    public static function getHeaderInfo($header = '', $echo = true)
    {
        ob_start();
        $headers = getallheaders();
        if (!empty($header)) {
            $info = $headers[$header];
            echo $header . ':' . $info . "\n";
        } else {
            foreach ($headers as $key => $val) {
                echo "{$key}:{$val}\n";
            }
        }
        $output = ob_get_clean();
        if ($echo) {
            echo nl2br($output);
        } else {
            return $output;
        }
        return '';
    }