The Process class relies on proc_open, which is not available on your PHP installation.

composer安装第三方插件时报错：The Process class relies on proc_open, which is not available on your PHP installation.

提示不支持使用proc_opan函数,需要打开，

解决办法：找到php/etc/php.ini，去掉proc_open函数即可，

如果是宝塔楼，找到proc_open，删除禁止即可。