相关疑难解决方法(0)

php -v:

PHP 5.5.10-1+deb.sury.org~precise+1 (cli) (built: Mar 27 2014 16:18:01) 
Copyright (c) 1997-2014 The PHP Group
Zend Engine v2.5.0, Copyright (c) 1998-2014 Zend Technologies
    with XCache v3.1.0, Copyright (c) 2005-2013, by mOo
    with Zend OPcache v7.0.3, Copyright (c) 1999-2014, by Zend Technologies
    with XCache Optimizer v3.1.0, Copyright (c) 2005-2013, by mOo
    with XCache Cacher v3.1.0, Copyright (c) 2005-2013, by mOo
    with XCache Coverager v3.1.0, Copyright (c) 2005-2013, by mOo

dpkg -l | grep php5

结果

rc  php5-memcache                                   3.0.6-1                                             memcache extension …

我需要一种方法来查找所有可用的PHP扩展,无论它们是否已加载.我看了如何看到PHP加载的扩展？ 但它只解释了如何查找加载的扩展名.我想要一种方法来查找卸载的扩展.

从php.ini知道extension_dir我做了一个ls /extension_dir/*.so返回26个条目.当我尝试时php -m,我有57个条目.这怎么可能？

我如何知道可以加载哪些PHP扩展？我不想知道哪些已加载但哪些是可加载的.