oneinstack安装PHP后开启gmp扩展，先安装在启用

yum -y install gmp-devel
cd ~/oneinstack/src
tar xzf php-7.2.10.tar.gz
cd php-7.2.10/ext/gmp
/usr/local/php/bin/phpize
./configure --with-php-config=/usr/local/php/bin/php-config
make && make install
echo 'extension=gmp.so' > /usr/local/php72/etc/php.d/gmp.ini 

在php.ini里开启找到gmp并去掉;即可

Windows用phpstudy开启即可