Gets the size of C data or types« FFI::scopeFFI::string »PHP ManualFFIGets the size of C data or typesFFI::sizeof(PHP 7 >= 7.4.0, PHP 8)FFI::sizeof — Gets the size of C data or types說明 public static FFI::sizeof(FFI\CData|FFI\CType &$ptr): int Returns the size of the given FFI\CData or FFI\CType object.參數 ptr The handle of the C data or type.返回值 The size of the memory area pointed at by ptr.