Description of problem:

There is a difference between setting httpd locale on RHEL 6 vs 7. On RHEL 7, this is done with the variable LANG in /opt/rh/httpd24/root/etc/sysconfig/httpd, whereas on RHEL 6 the variable HTTPD_LANG serves the same purpose. Yet by default, the said file contains on both RHEL versions the line 'LANG=C' which has little to no effect on RHEL 6 and should be replaced by HTTPD_LANG=C.

To inspect the impact of both variables, edit the sysconfig file to contain these two following lines:

LANG=ru_RU.utf-8
HTTPD_LANG=ja_JP.utf-8

Create file /opt/rh/httpd24/root/var/www/html/info.php with the following contents:

---
<?php
    print "LANG=" . getenv('LANG') . "\n";
?>
---

Now start the httpd24-httpd service and check the PHP script's output. On RHEL 6, we get:

# service httpd24-httpd start
Запускается httpd:                                         [  OK  ]
# curl http://localhost/info.php
LANG=ja_JP.utf-8

What we see is that the init script itself runs with the 'LANG' locale (Russian in this case), but httpd process is executed with the 'HTTPD_LANG' locale (Japanese). This contradicts the claim in the sysconfig file that the default 'LANG=C' line 'ensures the httpd process is started in the "C" locale'.

On RHEL 7, we get another result -- HTTPD_LANG is completely ignored and the 'LANG' locale is used with httpd processes:

# service httpd24-httpd start
Redirecting to /bin/systemctl start  httpd24-httpd.service
# curl http://localhost/info.php
LANG=ru_RU.utf-8

Version-Release number of selected component (if applicable):
httpd24-httpd-2.4.12-4.el6.x86_64