安装php5.5；
下载源地址：rpm -Uvh http://mirror.webtatic.com/yum/el6/latest.rpm
rpm包安装：yum install php55w.x86_64 php55w-cli.x86_64 php55w-common.x86_64 php55w-gd.x86_64 php55w-ldap.x86_64 php55w-mbstring.x86_64 php55w-mcrypt.x86_64 php55w-mysql.x86_64 php55w-pdo.x86_64
安装后如需要调用mysql模块需要安装mysql依赖：
yum install php55w-mysql
至此，php就安装完成了；
phpmyadmin也一样可以用yum安装:
yum install phpmyadmin
安装完成后，需要修改配置文件信息，比如mysql的信息，为正确的信息：
到phpmyadmin安装目录下面，/etc/phpMyAdmin/
编辑配置文件：config.inc.php
修改对应的mysql配置：
$cfg[‘Servers‘][$i][‘host‘] = ‘localhost‘; // MySQL hostname or IP address
$cfg[‘Servers‘][$i][‘port‘] = ‘60090‘; // MySQL port
$cfg[‘Servers‘][$i][‘extension‘] = ‘mysqli‘; // The php MySQL extension to use (‘mysql‘ or ‘mysqli‘)
$cfg[‘Servers‘][$i][‘auth_type‘] = ‘cookie‘; // Authentication method (config, http or cookie based)
$cfg[‘Servers‘][$i][‘AllowRoot‘] = TRUE; // whether to allow root login
重点是修改mysql的端口为对应的mysql端口，如连接的是远程mysql服务器，则需要把localhost改为远程服务器的ip地址；
提供phpmyadmin服务：
将/usr/share/phpMyAdmin建立软连接到/usr/share/nginx/html/下面，提供通过nginx访问phpmyadmin；
配置nginx添加php模块：
到nginx配置文件里，如/etc/nginx/conf.d/default.conf，添加如下配置：
location ~ \.php$ {
root html;
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
include fastcgi_params;
}
完成后，重启nginx；
启动php，service php-fpm start
如页面提示错误信息，可能php模块调用有问题，需要修改nginx的fastcgi_params,替换为如下内容：
fastcgi_param GATEWAY_INTERFACE CGI/1.1;
fastcgi_param SERVER_SOFTWARE nginx;
fastcgi_param QUERY_STRING $query_string;
fastcgi_param REQUEST_METHOD $request_method;
fastcgi_param CONTENT_TYPE $content_type;
fastcgi_param CONTENT_LENGTH $content_length;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param SCRIPT_NAME $fastcgi_script_name;
fastcgi_param REQUEST_URI $request_uri;
fastcgi_param DOCUMENT_URI $document_uri;
fastcgi_param DOCUMENT_ROOT $document_root;
fastcgi_param SERVER_PROTOCOL $server_protocol;
fastcgi_param REMOTE_ADDR $remote_addr;
fastcgi_param REMOTE_PORT $remote_port;
fastcgi_param SERVER_ADDR $server_addr;
fastcgi_param SERVER_PORT $server_port;
fastcgi_param SERVER_NAME $server_name;
重启nginx或者service nginx reload；
访问phpmyadmin：http://localhost/phpMyAdmin
界面需要mysql的账户和密码，配置正确即可登陆进去了；
php调用数据库：
需要修改/etc/php.ini文件，修改mysql的参数为正确的参数，如port，socket等；
php5.5安装及phpmyadmin&nginx配置php模块