composer wamp multi version (when install module error)

 問題：我電腦有原先有一個wamp，但是PHP版本為5.5，不能滿足Laravel的版本需求，所以我重新下載了最新版的wamp,我安裝了最新版的wamp，用composer提示PHP版本低


解決方法：

我退出了原來的wamp，啟用最新的wamp(含php7)，但還是不能用composer install初始化我的Laravel專案。

1） 在win cmd下執行php – version顯示為原來的版本5.5。好吧，其實已經有答案了，一開始沒有反應過來，這個5.5是因為我配置了環境變量，所以一直指向我原來的PHP目錄，導致composer失敗

2）解決方案：在我的电脑->属性->高级->环境变量中添加最新的PHP版本為環境變量，但是必須在之前環境變量的前面，當然也可以把之前的PHP環境變量刪除

3）重啟cmd或phpstorm運行composer install就可以了



143


You can change php version of composer without uninstalling it, follow these steps :


Search for system environment variables in cortana.

Click on the button "Environment variables".

Under "System variables" select path and click on edit, you will see one entry like this "C:\wamp\bin\php\php5.6.13".

Just change this to the folder name of the php located at your wamp/bin/php7.1.9, here php7.1.9 is folder name.

Replace php5.6.13 with bin7.1.9, it will look like these "C:\wamp\bin\php\php7.1.9", just click ok on all the boxes.

You are done.

To verify, first close all the cmd windows, than open cmd and type php -v, press enter and you should see php7.1.9.

If you don't see change in php version than just restart your pc and run php -v again in cmd , it will work.

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