1.1. 停止WAMP服务器.
2.下载要安装的PHP版本。下载Window版本的ZIP包啦：http://windows.php.net。解压到 Wamp的安装目录\bin\php\php7.2.3。
3.从已存在的php版本文件中（如php7.0.4 (eg. wamp/bin/php/php7.0.4）复制以下文件: - php.ini、phpForApache.ini和wampserver.conf到php7.2.3文件夹.
4.打开php7.1.0文件夹的以下文件: - php.ini和phpForApache.ini并且把其中所有的 7.0.4替换为7.1.0。
5.修改Wamp配置文件：进入 Wamp的安装目录，用IDE或记事本（最好使用行号定位的记事本，如EditPlus等）打开 wampmanager.ini，定位到 335 行，通常在这一行就是[phpVersion]，如果不是，则在附近找找。复制下面一行：
Type: item; Caption: "5.6.19"; Action: multi; Actions:switchPhp7.0.4
插入到这一行前面，并修改为
插入到这一行前面，并修改为
Type: item; Caption: "5.6.19"; Action: multi; Actions:switchPhpphp7.2.3
[switchPhp5.3.0]
Action: service; Service: wampapache; ServiceAction: stop; Flags: ignoreerrors waituntilterminated
Action: run; FileName: "Wamp的安装目录/bin/php/php5.6.19/php-win.exe";Parameters: "switchPhpVersion.php 5.3.0";WorkingDir: "Wamp的安装目录/scripts"; Flags: waituntilterminated
Action: run; FileName: "Wamp的安装目录/bin/php/php5.6.19/php-win.exe";Parameters: "-c . refresh.php";WorkingDir: "Wamp的安装目录/scripts"; Flags: waituntilterminated
Action: run; FileName: "net"; Parameters: "start wampapache"; ShowCmd: hidden; Flags: waituntilterminated
Action: resetservices
Action: readconfig;
Action: service; Service: wampapache; ServiceAction: stop; Flags: ignoreerrors waituntilterminated
Action: run; FileName: "Wamp的安装目录/bin/php/php5.6.19/php-win.exe";Parameters: "switchPhpVersion.php 5.3.0";WorkingDir: "Wamp的安装目录/scripts"; Flags: waituntilterminated
Action: run; FileName: "Wamp的安装目录/bin/php/php5.6.19/php-win.exe";Parameters: "-c . refresh.php";WorkingDir: "Wamp的安装目录/scripts"; Flags: waituntilterminated
Action: run; FileName: "net"; Parameters: "start wampapache"; ShowCmd: hidden; Flags: waituntilterminated
Action: resetservices
Action: readconfig;
插入这一段之前，并修改为
[switchPhp7.1.0]
Action: service; Service: wampapache; ServiceAction: stop; Flags: ignoreerrors waituntilterminated
Action: service; Service: wampapache; ServiceAction: stop; Flags: ignoreerrors waituntilterminated
Action: run; FileName: "Wamp的安装目录/bin/php/php5.3.0/php-win.exe";Parameters: "switchPhpVersion.phpphp7.2.3";WorkingDir: "Wamp的安装目录/scripts"; Flags: waituntilterminated
Action: run; FileName: "Wamp的安装目录/bin/php/php5.3.0/php-win.exe";Parameters: "-c . refresh.php";WorkingDir: "Wamp的安装目录/scripts"; Flags: waituntilterminated
Action: run; FileName: "Wamp的安装目录/bin/php/php5.3.0/php-win.exe";Parameters: "-c . refresh.php";WorkingDir: "Wamp的安装目录/scripts"; Flags: waituntilterminated
Action: run; FileName: "net"; Parameters: "start wampapache"; ShowCmd: hidden; Flags: waituntilterminated
Action: resetservices
Action: readconfig;
6. 去wamp/bin/apache/apache/apache2.2.11/bin删除php.ini文件。
7..重启wamp.
8.选择phpphp7.2.3版本，选择后后会重启wamp。
9.可以打开phpinfo察看此时是否有phpphp7.2.3的信息，然后打开Phpmyadmin,看是否可以访问。
10.完成。