OK, I know I probably did wrong!
I upgraded Centos 6.7 to 6.8.
Deleted Php 5.4.45 and installed 5.5.21
No cannot start Apache due to error:
Failed to start service :
Starting httpd: Syntax error on line 1230 of /etc/httpd/conf/httpd.conf:
Invalid command ‘php_value’, perhaps misspelled or defined by a module not included in the server configuration
In searching, php.ini was missing, so a copied a version from another folder.