实现php中环境变量启用步骤

环境：Centos linux os 
很多php同学经常会问到如何在我们的开发环境中使用php中的$_ENV 环境变量功能，以下步骤操作即可实现
1、在我们的php-fpm服务启动脚本（/etc/init.d/php-fpm）中添加
source /etc/profile
文件段如下：

#! /bin/sh

### BEGIN INIT INFO
# Provides: php-fpm
# Required-Start: $remote_fs $network
# Required-Stop: $remote_fs $network
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: starts php-fpm
# Description: starts the PHP FastCGI Process Manager daemon
### END INIT INFO

prefix=@prefix@
exec_prefix=@exec_prefix@

#php_fpm_BIN=@sbindir@/php-fpm
#php_fpm_CONF=@sysconfdir@/php-fpm.conf
#php_fpm_PID=@localstatedir@/run/php-fpm.pid

php_fpm_BIN=/usr/local/php/sbin/php-fpm
php_fpm_CONF=/usr/local/php/etc/php-fpm.conf
php_fpm_PID=/usr/local/php/var/run/php-fpm.pid

php_opts="--fpm-config $php_fpm_CONF"

source /etc/profile

wait_for_pid () {
        try=0

        while test $try -lt 35 ; do

                case "$1" in
                        'created')
                        if [ -f "$2" ] ; then
                                try=''
                                break
                        fi
                        ;;

                        'removed')
                        if [ ! -f "$2" ] ; then
                                try=''
                                break
                        fi
                        ;;
                esac

                echo -n .
                try=`expr $try + 1`
                sleep 1

        done

}

case "$1" in
        start)
                echo -n "Starting php-fpm "

                $php_fpm_BIN $php_opts

                if [ "$?" != 0 ] ; then
                        echo " failed"
                        exit 1
                fi

                wait_for_pid created $php_fpm_PID

                if [ -n "$try" ] ; then
                        echo " failed"
                        exit 1
                else
                        echo " done"
                fi
        ;;

        stop)
                echo -n "Gracefully shutting down php-fpm "

                if [ ! -r $php_fpm_PID ] ; then
                        echo "warning, no pid file found - php-fpm is not running ?"
                        exit 1
                fi

                kill -QUIT `cat $php_fpm_PID`

                wait_for_pid removed $php_fpm_PID

                if [ -n "$try" ] ; then
                        echo " failed. Use force-quit"
                        exit 1
                else
                        echo " done"
                fi
        ;;

        force-quit)
                echo -n "Terminating php-fpm "

                if [ ! -r $php_fpm_PID ] ; then
                        echo "warning, no pid file found - php-fpm is not running ?"
                        exit 1
                fi

                kill -TERM `cat $php_fpm_PID`

                wait_for_pid removed $php_fpm_PID

                if [ -n "$try" ] ; then
                        echo " failed"
                        exit 1
                else
                        echo " done"
                fi
        ;;

        restart)
                $0 stop
                $0 start
        ;;

        reload)

                echo -n "Reload service php-fpm "

                if [ ! -r $php_fpm_PID ] ; then
                        echo "warning, no pid file found - php-fpm is not running ?"
                        exit 1
                fi

                kill -USR2 `cat $php_fpm_PID`

                echo " done"
        ;;

        *)
                echo "Usage: $0 {start|stop|force-quit|restart|reload}"
                exit 1
        ;;

esac

2、在/etc/profile.d/php.sh文件中添加需加的环境变量KeyValue如下：
export MY_REDIS_HOST="localhost"
每一行一个。
3、修改php配置在php.ini中的
variables_order = "EGPCS"
4、修改php-fpm.conf配置添加如下：
include=/usr/local/php/etc/php-fpm.d/*.conf
5、添加PHP环境变量测试
]#echo “env[MY_REDIS_HOST]=$MY_REDIS_HOST” > /usr/local/php/etc/php-fpm.d/php-fpm.env.conf
6、重启php-fpm服务
service php-fpm restart

---

以上操作已经完成添加MY_REDIS_HOST 的值为localhost

可以通过以下test.php进行测试

<?php
echo getenv(MY_REDIS_HOST );
?>