PHP安装ionCube插件报错The Loader must appear as the first entry in the php.ini file in Unknown的解决方法

如果以前装有Zend Optimizer，安装ionCube会和Zend Optimizer发生冲突，再执行/usr/local/php/php-fpm reload 时会发生如下错误：

The Loader must appear as the first entry in the php.ini file in Unknown

须将Zend Optimizer的代码放在ionCube的后面，如：

[ionCube Loader]

zend_extension="/usr/local/ioncube/ioncube_loader_lin_5.4.so"

[Zend Optimizer]

zend_optimizer.optimization_level=1

zend_extension="/usr/local/zend/ZendOptimizer.so"

修改完成，记得/usr/local/php/php-fpm reload 重新加载配置，查看phpinfo。