Rewrite setcookie using new syntax (#8447)

Follow-up of https://github.com/FreshRSS/FreshRSS/pull/2630 now that we have PHP 7.3+ (even PHP 8.1+).
* The new syntax natively supports `samesite`, and also avoids the need of re-setting all parameters.
* Use automatic path instead of own function `getCookieDir()`.

Follow-up of https://github.com/FreshRSS/FreshRSS/pull/8446
* Sanitize lifetime of session cookies from PHP ini to avoid likely invalid/misunderstood values

lib/Minz/Session.php

@@ -30,7 +30,7 @@ class Minz_Session {
 	}
 
 	/**
-	 * Initialize the session, with a name
+	 * Initialize and start the session, with a name
 	 * The session name is used as the name for cookies and URLs (i.e. PHPSESSID).
 	 * It should contain only alphanumeric characters; it should be short and descriptive
 	 * If the volatile parameter is true, then no cookie and not session storage are used.
@@ -43,19 +43,24 @@ class Minz_Session {
 			return;
 		}
 
-		$cookie = session_get_cookie_params();
-		self::keepCookie($cookie['lifetime']);
+		$params = session_get_cookie_params();
+		// Sanitize lifetime of session cookies from PHP ini `session.cookie_lifetime` (default 0)
+		$params['lifetime'] = ($params['lifetime'] <= 0 || $params['lifetime'] > 86400) ? 0 : $params['lifetime'];
+		$params['path'] = '';	// Current directory
+		$params['domain'] = '';	// Current domain
+		$params['secure'] = Minz_Request::isHttps();
+		$params['httponly'] = true;
+		$params['samesite'] = 'Lax';
+		session_set_cookie_params($params);
 
-		// start session
 		session_name($name);
-		//When using cookies (default value), session_stars() sends HTTP headers
+		// When using cookies (default value), session_start() sends HTTP headers
 		session_start();
 		session_write_close();
-		//Use cookie only the first time the session is started to avoid resending HTTP headers
+		// Use cookie only the first time the session is started to avoid resending HTTP headers
 		ini_set('session.use_cookies', '0');
 	}
 
-
 	/**
 	 * Allows you to retrieve a session variable
 	 * @param string $p the parameter to retrieve
@@ -175,27 +180,6 @@ class Minz_Session {
 		}
 	}
 
-	public static function getCookieDir(): string {
-		// Get the script_name (e.g. /p/i/index.php) and keep only the path.
-		$cookie_dir = '';
-		if (!empty($_SERVER['HTTP_X_FORWARDED_PREFIX']) && is_string($_SERVER['HTTP_X_FORWARDED_PREFIX'])) {
-			$cookie_dir .= rtrim($_SERVER['HTTP_X_FORWARDED_PREFIX'], '/ ');
-		}
-		$cookie_dir .= empty($_SERVER['REQUEST_URI']) || !is_string($_SERVER['REQUEST_URI']) ? '/' : $_SERVER['REQUEST_URI'];
-		if (substr($cookie_dir, -1) !== '/') {
-			$cookie_dir = dirname($cookie_dir) . '/';
-		}
-		return $cookie_dir;
-	}
-
-	/**
-	 * Specifies the lifetime of the cookies
-	 * @param int $l the lifetime
-	 */
-	public static function keepCookie(int $l): void {
-		session_set_cookie_params($l, self::getCookieDir(), '', Minz_Request::isHttps(), true);
-	}
-
 	/**
 	 * Regenerate a session id.
 	 */
@@ -214,21 +198,27 @@ class Minz_Session {
 			Minz_Error::error(500);
 			return;
 		}
-		$lifetime = session_get_cookie_params()['lifetime'];
-		$expire = $lifetime > 0 ? time() + $lifetime : 0;
-		setcookie($name, $newId, $expire, self::getCookieDir(), '', Minz_Request::isHttps(), true);
+		$params = session_get_cookie_params();
+		$params['expires'] = $params['lifetime'] > 0 ? time() + $params['lifetime'] : 0;
+		unset($params['lifetime']);
+		setcookie($name, $newId, $params);
 	}
 
 	public static function deleteLongTermCookie(string $name): void {
-		setcookie($name, '', 1, '', '', Minz_Request::isHttps(), true);
+		$params = session_get_cookie_params();
+		$params['expires'] = 1;
+		unset($params['lifetime']);
+		setcookie($name, '', $params);
 	}
 
 	public static function setLongTermCookie(string $name, string $value, int $expire): void {
-		setcookie($name, $value, $expire, '', '', Minz_Request::isHttps(), true);
+		$params = session_get_cookie_params();
+		$params['expires'] = $expire;
+		unset($params['lifetime']);
+		setcookie($name, $value, $params);
 	}
 
 	public static function getLongTermCookie(string $name): string {
 		return is_string($_COOKIE[$name] ?? null) ? $_COOKIE[$name] : '';
 	}
-
 }

p/.htaccess

@@ -44,7 +44,6 @@ AddDefaultCharset	UTF-8
 			Header merge Cache-Control "immutable"
 		</If>
 	</FilesMatch>
-	Header edit Set-Cookie ^(.*)$ "$1; SameSite=Lax"
 </IfModule>
 
 # Provide the true IP address of the connection (e.g. last proxy), even when using mod_remoteip