[CentOS] Cannot get php errors to go to a file

Using basically the same setup that works on C6, I have a C7 site.

in PHP.INI, it says "error_log = /tmp/php_errors.log"

PHP errors do not go there (or anywhere).

1. Apache has write perms to /tmp
2. I have restarted httpd since changing php.ini
3. The base php.ini is from the development version in /usr/share
4. Selinux is disabled.

Ideas?
-- 
-- Steve