http启动失败：httpd[20947]: AH00526: Syntax error on line 31 of /etc/httpd/conf.d/php.conf:

记一次http启动失败

环境：centos7.4

原装环境：zabbix-server3.4（10051）；zabbix-agent（10050）；mariadb10.0（3306）；httpd（Apache/2.4.6）（80，443）

新增环境：nginx-1.11.7（8081，8032，8033）；php-fpm-5.3.28（9000）

[root@localhost conf.d]# mysql -V

mysql Ver 15.1 Distrib 10.0.32-MariaDB, for Linux (x86_64) using readline 5.1

[root@localhost conf.d]# httpd -v
Server version: Apache/2.4.6 (CentOS)
Server built: Jun 27 2018 13:48:59

[root@localhost conf.d]# /usr/local/nginx/sbin/nginx -v
nginx version: nginx/1.11.7

[root@localhost conf.d]# /usr/local/nginx/sbin/nginx -v
nginx version: nginx/1.11.7
[root@localhost conf.d]# /usr/local/php/sbin/php-fpm -v
PHP 5.3.28 (fpm-fcgi) (built: Sep 13 2018 17:36:18)
Copyright (c) 1997-2013 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2013 Zend Technologies
    with Zend Guard Loader v3.3, Copyright (c) 1998-2010, by Zend Technologies

早上新增环境后，8032,8033端口对应的web服务都能正常打开，但下午，想检查一下zabbix-server界面，发现打不开。

期初，我以为是nginx和apache环境冲突，但其实两者都可以共存。但此时，发现httpd服务端口已经停用，当试图重启httpd服务时，报错。

[root@localhost conf.d]# systemctl restart httpd.service

Job for httpd.service failed because the control process exited with error code. See "systemctl status httpd.service" and "journalctl -xe" for details.

查看报错内容

[root@localhost conf.d]# systemctl status httpd.service -l

● httpd.service - The Apache HTTP Server

   Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled)

   Active: failed (Result: exit-code) since 六 2018-09-15 12:44:35 CST; 5min ago

     Docs: man:httpd(8)

           man:apachectl(8)

  Process: 20949 ExecStop=/bin/kill -WINCH ${MAINPID} (code=exited, status=1/FAILURE)

  Process: 20947 ExecStart=/usr/sbin/httpd $OPTIONS -DFOREGROUND (code=exited, status=1/FAILURE)

 Main PID: 20947 (code=exited, status=1/FAILURE)

9月 15 12:44:35 localhost.localdomain systemd[1]: Starting The Apache HTTP Server...

9月 15 12:44:35 localhost.localdomain httpd[20947]: AH00526: Syntax error on line 31 of /etc/httpd/conf.d/php.conf:

9月 15 12:44:35 localhost.localdomain httpd[20947]: Invalid command 'php_value', perhaps misspelled or defined by a module not included in the server configuration

9月 15 12:44:35 localhost.localdomain systemd[1]: httpd.service: main process exited, code=exited, status=1/FAILURE

9月 15 12:44:35 localhost.localdomain kill[20949]: kill: cannot find process ""

9月 15 12:44:35 localhost.localdomain systemd[1]: httpd.service: control process exited, code=exited status=1

9月 15 12:44:35 localhost.localdomain systemd[1]: Failed to start The Apache HTTP Server.

9月 15 12:44:35 localhost.localdomain systemd[1]: Unit httpd.service entered failed state.

9月 15 12:44:35 localhost.localdomain systemd[1]: httpd.service failed.

提示：/etc/httpd/conf.d/php.conf文件31行有语法错误

好吧，检查。貌似因为这个语法错误导致之后的“php_value”模块加载不出来。既然加载不出来，那么就尝试着注释掉它。

重启服务成功检查端口，端口存活

检查zabbix界面

看来是失败了。

在zabbix.conf中继续注释php_value所指示的块

重启服务，过滤端口，成功

检查web界面

依旧错误

此时怀疑是php-fpm环境与原装php环境冲突，毕竟zabbix3.0以上版本对php环境的最低要求是php5.4，而新装的php-fpm版本是5.3，所以这是我最怀疑的。而通过php -v查询默认的php版本

[root@localhost conf.d]# php -v

Zend Guard Loader requires Zend Engine API version 220090626.

The Zend Engine API version 220100525 which is installed, is newer.

Contact Zend Technologies at http://www.zend.com/ for a later version of Zend Guard Loader.

PHP 5.4.16 (cli) (built: Apr 12 2018 19:02:01)

Copyright (c) 1997-2013 The PHP Group

Zend Engine v2.4.0, Copyright (c) 1998-2013 Zend Technologies

默认版本也确实是php 5.4，所以这个原因排除。

仔细上网百度，发现国内各网站都没有针对这个问题作出详细解释。而无意间发现一个针对这个问题的讨论：https://serverfault.com/questions/515417/error-start-apache-php-value