cd /usr/local/src
git clone https://github.com/jbboehr/php-psr.git
cd php-psr
/usr/local/php/bin/phpize
./configure --with-php-config=/usr/local/php/bin/php-config
make
make install

在php.ini中添加extension=psr.so
重启php-fpm          /etc/init.d/php-fpm reload

查看php扩展   php -m