PHP 5.5 的第四个 Beta 版本发布了，包含如下 bug 修复：
Fixed bug #64677, execution operator `` stealing surrounding arguments.
Fixed bug #64342, ZipArchive::addFile() has to check for file existence.
Fixed Windows x64 version of stream_socket_pair() and improved error handling.
Remove curl stream wrappers
完整记录请看：https://github.com/php/php-src/blob/php-5.5.0beta4/NEWS
来自:开源中国社区
