PHP settings & admin login white screen

[BSD-shnik]

Hi everyone.
I`ve got an own hosting, everything was fine, but now got some trouble  without visible reason.
Now, i'm in a dead block. and I want to ask some help of community

prestashop-1.6.0.14

The front office working fine, but got a white screen  of admin login page.
An error reporting returns nothing, the blank white page only.
A scripting protocol returns:

 

"26 Jun 2016 00:06:41","/classes/Cookie.php:
  334","(Warning) Cannot modify header information - headers already sent by (output started at Admin_dir/index.php:34)"
"26 Jun 2016 00:06:41","/classes/controller/AdminController.php:
  1595","(Warning) Cannot modify header information - headers already sent by (output started at Admin_dir/index.php:34)"
"26 Jun 2016 00:07:12","/classes/Tools.php:
  1785","(Warning) file_get_contents(): php_network_getaddresses: getaddrinfo failed: hostname nor servname provided, or not known"
"26 Jun 2016 00:07:12","/classes/Tools.php:
  1785","(Warning) file_get_contents(https://api.addons.prestashop.com): failed to open stream: php_network_getaddresses: getaddrinfo failed: hostname nor servname provided, or not known"
"26 Jun 2016 00:07:42","/classes/Tools.php:
  1785","(Warning) file_get_contents(): php_network_getaddresses: getaddrinfo failed: hostname nor servname provided, or not known"
"26 Jun 2016 00:07:42","/classes/Tools.php:
  1785","(Warning) file_get_contents(http://api.addons.prestashop.com): failed to open stream: php_network_getaddresses: getaddrinfo failed: hostname nor servname provided, or not known"

But those are warnings, and back office must work.

I have changed permissions to 0777 for all Prestashop root directory in depth, got a similar result.
The cache (/cache/smarty/cache & cache/smarty/compile) are cleared manualy.
And location of web server are checked, the info() function returns a correct result from admin directory.
And not memory_limit (php.ini) option size is a reason, the memory_limi = 256 Mb.

I have restored all from the working backup for a test, got the similar result.

Obviously, a reason in a PHP settings or in extensions. But cannot found it myself. Please, HELP!!!
See an attached php.ini and info() report files.

php.ini.txt

phpinfo().html

Edited July 6, 2016 by BSD-shnik (see edit history)

[BSD-shnik]

Hi guys.
Have  some ideas?
Got a one elaboration. This issue has a one strange circumstance.
When i disabled allow_url_fopen php.ini option, can load my admin pannel. But this option must be "On" in accordance with prestashop system requirements. What is the conflict?

[vekia]

it's because prestashop trying to connect to their online ecosystem - to get currency rates, some addons, information about updates etc.

[BSD-shnik]

it's because prestashop trying to connect to their online ecosystem - to get currency rates, some addons, information about updates etc.

 

Thanks, but what must i do for a solve the trouble?

Just it`s a strange situation, another copy of the shop working fine on virtual machine of the host. What functions & what services must i check?

[BSD-shnik]

I want to add something more about the issue.

I restarted php-fpm service as a root user, all working, was loaded everything. Then, i saw a lot of new dirs with  a root owner on the cache/smarty/cache dir. (that`s predictable)
When i restarted php-fpm as a www user mode and reloaded one of backoffice page, had got a lot of errores:

Warning string 192 /tools/smarty/sysplugins/smarty_internal_template.php
[2] touch(): Utime failed: Permission denied

This part of the file

// compile locking
        if ($this->smarty->compile_locking && !$this->source->recompiled) {
            if ($saved_timestamp = $this->compiled->timestamp) {
 !!str 192!!            touch($this->compiled->filepath);                     

I set an owner of all cache files as www recursively, and restarted php-fpm as a www user mode. The back office and frontoffice worked, until a cache clearing.

After the cache clearing or in a new session the back office does not working again, as before.

However, the front office working fine, and creates all necessary dirs and files in a cache dirs without some problems. But i can not understand, why the admin interface has not an enough permissions for create a new dirs and files in a cache dir,
with a recursive  777 permissions ?

 

The partition mounted without  acls,nosuid,noexec mount options.

Edited July 24, 2016 by BSD-shnik (see edit history)