centreon安装完成之后配置向导出错，在线等，分不够再加
Component Status 
PHP Version 5.x OK (ver 5.3.1)  
PHP Extension  
  MySQL OK  
  GD Critical: gd.so not loaded in php.ini  
  LDAP Warning: ldap.so not loaded in php.ini  
  XML Writer OK  
  MB String Critical: php-mbstring functions are not installed  
  PHP-POSIX OK  
  PEAR OK  
Writable Nagios Config Directory OK 


------解决方案--------------------
是redhat系的系统吗
yum -y install php-gd php-ldap php-mbstring