memcache support requires ZLIB解决办法
configure: error: memcache support requires ZLIB. Use --with-zlib-dir=<DIR> to specify prefix where ZLIB include and library are located
ERROR: `/var/cache/php-pear/memcache-2.2.5/configure --enable-memcache-session=yes' failed
make sure you have zlib-devel installed
yum install zlib-devel