private function _isRedirectRegex ($uri)
	{
		// If the URI doesn't look like a regex...
		if (preg_match('/\/(.*)\/([g|m|i|x|X|s|u|U|A|J|D]+)/m', $uri) === 0)
		{
			// Escape all non-escaped `?` not inside parentheses
			$i = preg_match_all(
				'/(?<!\\\\)\?(?![^(]*\))/',
				$uri,
				$matches,
				PREG_OFFSET_CAPTURE
			);

			while ($i--)
			{
				$x   = $matches[0][$i][1];
				$uri = substr_replace($uri, '\?', $x, 1);
			}

			// Escape all non-escaped `/` not inside parentheses
			$i = preg_match_all(
				'/(?<!\\\\)\/(?![^(]*\))/',
				$uri,
				$matches,
				PREG_OFFSET_CAPTURE
			);

			while ($i--)
			{
				$x   = $matches[0][$i][1];
				$uri = substr_replace($uri, '\/', $x, 1);
			}
		}

		// Check if contains a valid regex
		if (@preg_match($uri, null) === false)
			$uri = '/^' . $uri . '$/i';

		if (@preg_match($uri, null) !== false)
			return $uri;

		return false;
	}
private function _isRedirectRegex ($uri)
	{
		// If the URI doesn't look like a regex...
		if (preg_match('/\/(.*)\/([g|m|i|x|X|s|u|U|A|J|D]+)/m', $uri) === 0)
		{
			// Escape all non-escaped `?` not inside parentheses
			$i = preg_match_all(
				'/(?<!\\\\)\?(?![^(]*\))/',
				$uri,
				$matches,
				PREG_OFFSET_CAPTURE
			);

			while ($i--)
			{
				$x   = $matches[0][$i][1];
				$uri = substr_replace($uri, '\?', $x, 1);
			}

			// Escape all non-escaped `/` not inside parentheses
			$i = preg_match_all(
				'/(?<!\\\\)\/(?![^(]*\))/',
				$uri,
				$matches,
				PREG_OFFSET_CAPTURE
			);

			while ($i--)
			{
				$x   = $matches[0][$i][1];
				$uri = substr_replace($uri, '\/', $x, 1);
			}
		}

		// Check if contains a valid regex
		if (@preg_match($uri, null) === false)
			$uri = '/^' . $uri . '$/i';

		if (@preg_match($uri, null) !== false)
			return $uri;

		return false;
	}
private function _isRedirectRegex ( $ uri ) { // If the URI doesn't look like a regex... if ( preg_match ( '/\/(.*)\/([g|m|i|x|X|s|u|U|A|J|D]+)/m' , $ uri ) === 0 ) { // Escape all non-escaped `?` not inside parentheses $ i = preg_match_all ( '/(?<!\\\\)\?(?![^(]*\))/' , $ uri , $ matches , PREG_OFFSET_CAPTURE ) ; while ( $ i -- ) { $ x = $ matches [ 0 ] [ $ i ] [ 1 ] ; $ uri = substr_replace ( $ uri , '\?' , $ x , 1 ) ; } // Escape all non-escaped `/` not inside parentheses $ i = preg_match_all ( '/(?<!\\\\)\/(?![^(]*\))/' , $ uri , $ matches , PREG_OFFSET_CAPTURE ) ; while ( $ i -- ) { $ x = $ matches [ 0 ] [ $ i ] [ 1 ] ; $ uri = substr_replace ( $ uri , '\/' , $ x , 1 ) ; } } // Check if contains a valid regex if ( @ preg_match ( $ uri , null ) === false ) $ uri = '/^' . $ uri . '$/i' ; if ( @ preg_match ( $ uri , null ) !== false ) return $ uri ; return false ; }
Checks if the redirect URI is a regex

@param string $uri

@return bool|mixed|string
Checks if the redirect URI is a regex