httpd: Syntax error on line 53 of /usr/local/apache/conf/httpd.conf: Cannot load /usr/local/apache/modules/libphp5.so into server: /usr/local/apache/modules/libphp5.so: cannot restore segment prot after reloc: Permission denied
百度了一下基本问题就是SELinux保护模式引起的

1、关闭SELINUX的方法:

编辑/etc/selinux/config，找到这段：
# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - SELinux is fully disabled.
SELINUX=enforcing

把 SELINUX=enforcing 注释掉：#SELINUX=enforcing ，然后新加一行为：
SELINUX=disabled
保存，关闭。

编辑/etc/sysconfig/selinux，找到:
# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - SELinux is fully disabled.
SELINUX=enforcing

如果SELINUX已经是 SELINUX=disabled，那么就不用改了，否则就把SELINUX=enforcing 注释掉，新加一行：
SELINUX=disabled
保存，退出。

如果你碰到其他类似提示：
cannot restore segment prot after reloc: Permission denied
哪应该是SELinux的问题，可以考虑把它关闭。

2、不关闭SELINUX的方法:

# setenforce 0
# chcon -c -v -R -u system_u -r object_r -t textrel_shlib_t /usr/local/apache/modules/libphp5.so
# service httpd restart
# setenforce 1
 实验了一下确实管用apapche启动正常，php正常显示。