core-bundle/src/Resources/contao/library/Contao/Validator.php
public static function isValidFileName($strName)
	{
		if ($strName == '')
		{
			return false;
		}

		// Special characters not supported on e.g. Windows
		if (preg_match('@[\\\\/:*?"<>|]@', $strName))
		{
			return false;
		}

		// Invisible control characters or unused code points
		if (preg_match('/[\pC]/u', $strName) !== 0)
		{
			return false;
		}

		// Must not be longer than 255 characters
		if (Utf8::strlen($strName) > 255)
		{
			return false;
		}

		return true;
	}
public static function isValidFileName($strName)
	{
		if ($strName == '')
		{
			return false;
		}

		// Special characters not supported on e.g. Windows
		if (preg_match('@[\\\\/:*?"<>|]@', $strName))
		{
			return false;
		}

		// Invisible control characters or unused code points
		if (preg_match('/[\pC]/u', $strName) !== 0)
		{
			return false;
		}

		// Must not be longer than 255 characters
		if (Utf8::strlen($strName) > 255)
		{
			return false;
		}

		return true;
	}
public static function isValidFileName ( $ strName ) { if ( $ strName == '' ) { return false ; } // Special characters not supported on e.g. Windows if ( preg_match ( '@[\\\\/:*?"<>|]@' , $ strName ) ) { return false ; } // Invisible control characters or unused code points if ( preg_match ( '/[\pC]/u' , $ strName ) !== 0 ) { return false ; } // Must not be longer than 255 characters if ( Utf8 :: strlen ( $ strName ) > 255 ) { return false ; } return true ; }
Valid file name

@param mixed $strName The file name

@return boolean True if the file name is valid
Valid file name