Unable to Install a Module Using PECL

Symptoms

Unable to install a module using PECL

Description 

When you attempt to install a module via PECL, the installation fails with this error:

 ERROR: failed to run `phpize' 

Workaround

Check to see if the 'popen' function is listed in the respective PHP version's "Disabled Functions":

grep disable_functions /opt/cpanel/ea-php*/root/etc/php.ini

If 'popen' is listed, it should be removed, as this function is required for PECL to install PHP modules.