Linux下编译安装PHP时，make后出现：

PEAR package PHP_Archive not installed: generated phar will require PHP's phar extension be enabled.

解决办法：

先不理它，make install之后，运行以下命令：

/php安装目录/bin/pear install channel://pear.php.net/PHP_Archive-0.12.0
downloading PHP_Archive-0.12.0.tgz ... 
Starting to download PHP_Archive-0.12.0.tgz (86,179 bytes) 
.....................done: 86,179 bytes 
install ok: channel://pear.php.net/PHP_Archive-0.12.0

再次make，不再提示。