Between PHP 4.0.6 and 4.1.0, the Zend module struct changed in a way that broke both source and binary compatibility. If you are maintaining a third party extension, here's how to update it:
PHP版本升级到5.4后，原来的memcache用不了了，提示如下 "PHP Startup: memcache: Unable t initialize module. Module compiled with module API=20090626 PHP compiled with module api=20100525 These options need to match" 解决办法：PHP升级后，PHP的某些扩展也得相应的升级，将本压缩包里的文件放到PHP的ext文件夹覆盖原来的文
