Warning: popen() has been disabled for security reasons in OS/Guess.php on line 241

　　Today, the use of time pecl install swoole command prompt to compile and install swoole: Warning: popen () has been Disabled for Security Reasons in OS / Guess.php ON Line 241 error

　　Heart shocked, and quickly Baidu know what that is in php.ini will popen function disabled, to sum up here, so as not to meet again later after a loss

　　Solution:

　　Find php.ini

　　After opening found

　　There are disabled function, which requires, deleted

　　Then save and exit

　　Execution /etc/init.d/php-fpm restart on OK to restart