How to install SOAP extension on PHP-FPM 5.5.6 - dependency issue
Solution 1:
Read the output carefully again:
Installed: php-common-5.5.5-2.el6.remi.x86_64 (@remi-php55)
Using
yum --enablerepo=remi-php55 install php-soap
should help. Check this link.
And please do not try to install Fedora packages on CentOS.