phpMyAdmin can't run on CentOS 6.5 with PHP5.5.8

Question

I have a CentOS 6.5 x64 server running nginx 1.0.15, PHP (FPM/FastCGI) 5.5.8 and MySQL 5.5.35.

I've installed phpMyAdmin 4.1.5 and configured an nginx vhost with the html_root linked with a symlink to the directory of phpMyAdmin.

My problem is that when I open the address (https://172.28.65.80:8060) I get from phpMyAdmin this error:

Fatal error: Call to undefined function __() in /usr/share/phpMyAdmin/libraries/core.lib.php on line 229

What am I doing wrong?

Edit:

If I try to run phpMyAdmin from console using php (not php-fpm) it says:

# php /usr/share/phpMyAdmin/index.php

Warning: require(./libraries/Error_Handler.class.php): failed to open stream: No such file or directory in /usr/share/phpMyAdmin/libraries/common.inc.php on line 57

Fatal error: require(): Failed opening required './libraries/Error_Handler.class.php' (include_path='.:/usr/share/pear:/usr/share/php') in /usr/share/phpMyAdmin/libraries/common.inc.php on line 57

obviously Error_Handler.class.php is correctly stored in /usr/share/phpMyAdmin/libraries/

Edit2:

This is the configuration of the virtualhost used by phpMyAdmin:

#
# HTTPS phpmyadmin virtual host configuration
#

server {
    listen       8060;
    server_name  172.28.65.80;

    ssl                  on;
    ssl_certificate      /root/rootCA.pem;
    ssl_certificate_key  /root/rootCA.key;

    ssl_session_timeout  5m;

    ssl_protocols  SSLv2 SSLv3 TLSv1;
    ssl_ciphers  ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP;
    ssl_prefer_server_ciphers   on;

    location / {
        root   /usr/share/phpMyAdmin;
        index  index.php;
    }

    location ~ \.php$ {
         root           /usr/share/phpMyAdmin;
         fastcgi_pass   unix:/var/run/php-fpm.sock;
         fastcgi_index  index.php;
         fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
         include        fastcgi_params;
    }

}

Edit3:

These are the permissions of the phpMyAdmin files:

# ll
total 692
-rw-r--r--.  1 nginx nginx  1569 Jan 17 14:21 browse_foreigners.php
-rw-r--r--.  1 nginx nginx  4829 Jan 17 14:21 changelog.php
-rw-r--r--.  1 nginx nginx   308 Jan 17 14:21 chk_rel.php
-rw-r--r--.  1 nginx nginx   852 Jan 17 14:21 composer.json
-rwxr-xr-x.  1 nginx nginx  4236 Jan 23 15:18 config.inc.php
-rw-r--r--.  1 nginx nginx  4236 Jan 17 14:21 config.sample.inc.php
-rw-r--r--.  1 nginx nginx  4178 Jan 17 14:21 db_create.php
-rw-r--r--.  1 nginx nginx  8870 Jan 17 14:21 db_datadict.php
-rw-r--r--.  1 nginx nginx   401 Jan 17 14:21 db_events.php
-rw-r--r--.  1 nginx nginx  2788 Jan 17 14:21 db_export.php
-rw-r--r--.  1 nginx nginx   505 Jan 17 14:21 db_import.php
-rw-r--r--.  1 nginx nginx  9297 Jan 17 14:21 db_operations.php
-rw-r--r--.  1 nginx nginx  5269 Jan 17 14:21 db_printview.php
-rw-r--r--.  1 nginx nginx  1987 Jan 17 14:21 db_qbe.php
-rw-r--r--.  1 nginx nginx   454 Jan 17 14:21 db_routines.php
-rw-r--r--.  1 nginx nginx  1636 Jan 17 14:21 db_search.php
-rw-r--r--.  1 nginx nginx   872 Jan 17 14:21 db_sql.php
-rw-r--r--.  1 nginx nginx  9465 Jan 17 14:21 db_structure.php
-rw-r--r--.  1 nginx nginx  8277 Jan 17 14:21 db_tracking.php
-rw-r--r--.  1 nginx nginx   364 Jan 17 14:21 db_triggers.php
drwxr-xr-x.  5 nginx nginx  4096 Jan 23 15:00 doc
-rw-r--r--.  1 nginx nginx  3122 Jan 17 14:21 error_report.php
drwxr-xr-x.  2 nginx nginx  4096 Jan 23 15:00 examples
-rw-r--r--.  1 nginx nginx 37639 Jan 17 14:21 export.php
-rw-r--r--.  1 nginx nginx 18902 Jan 17 14:21 favicon.ico
-rw-r--r--.  1 nginx nginx  2143 Jan 17 14:21 file_echo.php
-rw-r--r--.  1 nginx nginx 15581 Jan 17 14:21 gis_data_editor.php
-rw-r--r--.  1 nginx nginx 21171 Jan 17 14:21 import.php
-rw-r--r--.  1 nginx nginx  2679 Jan 17 14:21 import_status.php
-rw-r--r--.  1 nginx nginx 19846 Jan 17 14:21 index.php
drwxr-xr-x.  9 nginx nginx  4096 Jan 23 15:00 js
drwxr-xr-x. 13 nginx nginx 12288 Jan 23 15:00 libraries
-rw-r--r--.  1 nginx nginx   728 Jan 17 14:21 license.php
drwxr-xr-x. 42 nginx nginx  4096 Jan 23 15:00 locale
-rw-r--r--.  1 nginx nginx  1988 Jan 17 14:21 navigation.php
-rw-r--r--.  1 nginx nginx   389 Jan 17 14:21 phpinfo.php
-rw-r--r--.  1 nginx nginx   746 Jan 17 14:21 phpmyadmin.css.php
-rw-r--r--.  1 nginx nginx  1808 Jan 17 14:21 phpunit.xml.nocoverage
-rw-r--r--.  1 nginx nginx  2051 Jan 17 14:21 pmd_display_field.php
-rw-r--r--.  1 nginx nginx 36692 Jan 17 14:21 pmd_general.php
-rw-r--r--.  1 nginx nginx  5081 Jan 17 14:21 pmd_pdf.php
-rw-r--r--.  1 nginx nginx  4560 Jan 17 14:21 pmd_relation_new.php
-rw-r--r--.  1 nginx nginx  2194 Jan 17 14:21 pmd_relation_upd.php
-rw-r--r--.  1 nginx nginx  2589 Jan 17 14:21 pmd_save_pos.php
-rw-r--r--.  1 nginx nginx  2594 Jan 17 14:21 prefs_forms.php
-rw-r--r--.  1 nginx nginx 14308 Jan 17 14:21 prefs_manage.php
-rw-r--r--.  1 nginx nginx  1213 Jan 17 14:21 print.css
-rw-r--r--.  1 nginx nginx  6222 Jan 17 14:21 querywindow.php
-rw-r--r--.  1 nginx nginx  4004 Jan 17 14:21 schema_edit.php
-rw-r--r--.  1 nginx nginx  1734 Jan 17 14:21 schema_export.php
-rw-r--r--.  1 nginx nginx  1075 Jan 17 14:21 server_binlog.php
-rw-r--r--.  1 nginx nginx   735 Jan 17 14:21 server_collations.php
-rw-r--r--.  1 nginx nginx  2634 Jan 17 14:21 server_databases.php
-rw-r--r--.  1 nginx nginx   615 Jan 17 14:21 server_engines.php
-rw-r--r--.  1 nginx nginx   698 Jan 17 14:21 server_export.php
-rw-r--r--.  1 nginx nginx   452 Jan 17 14:21 server_import.php
-rw-r--r--.  1 nginx nginx  1465 Jan 17 14:21 server_plugins.php
-rw-r--r--.  1 nginx nginx 11668 Jan 17 14:21 server_privileges.php
-rw-r--r--.  1 nginx nginx  2054 Jan 17 14:21 server_replication.php
-rw-r--r--.  1 nginx nginx   577 Jan 17 14:21 server_sql.php
-rw-r--r--.  1 nginx nginx   889 Jan 17 14:21 server_status_advisor.php
-rw-r--r--.  1 nginx nginx  3538 Jan 17 14:21 server_status_monitor.php
-rw-r--r--.  1 nginx nginx  1369 Jan 17 14:21 server_status.php
-rw-r--r--.  1 nginx nginx  1663 Jan 17 14:21 server_status_queries.php
-rw-r--r--.  1 nginx nginx  1507 Jan 17 14:21 server_status_variables.php
-rw-r--r--.  1 nginx nginx  1625 Jan 17 14:21 server_user_groups.php
-rw-r--r--.  1 nginx nginx  1283 Jan 17 14:21 server_variables.php
drwxr-xr-x.  4 nginx nginx  4096 Jan 23 15:00 setup
-rw-r--r--.  1 nginx nginx  1039 Jan 17 14:21 show_config_errors.php
-rw-r--r--.  1 nginx nginx  5507 Jan 17 14:21 sql.php
-rw-r--r--.  1 nginx nginx  3474 Jan 17 14:21 tbl_addfield.php
-rw-r--r--.  1 nginx nginx  5763 Jan 17 14:21 tbl_change.php
-rw-r--r--.  1 nginx nginx  4400 Jan 17 14:21 tbl_chart.php
-rw-r--r--.  1 nginx nginx  2650 Jan 17 14:21 tbl_create.php
-rw-r--r--.  1 nginx nginx  2880 Jan 17 14:21 tbl_export.php
-rw-r--r--.  1 nginx nginx  1657 Jan 17 14:21 tbl_find_replace.php
-rw-r--r--.  1 nginx nginx  1334 Jan 17 14:21 tbl_get_field.php
-rw-r--r--.  1 nginx nginx  3452 Jan 17 14:21 tbl_gis_visualization.php
-rw-r--r--.  1 nginx nginx   590 Jan 17 14:21 tbl_import.php
-rw-r--r--.  1 nginx nginx  1205 Jan 17 14:21 tbl_indexes.php
-rw-r--r--.  1 nginx nginx  2828 Jan 17 14:21 tbl_move_copy.php
-rw-r--r--.  1 nginx nginx 12498 Jan 17 14:21 tbl_operations.php
-rw-r--r--.  1 nginx nginx  1474 Jan 17 14:21 tbl_printview.php
-rw-r--r--.  1 nginx nginx  4616 Jan 17 14:21 tbl_relation.php
-rw-r--r--.  1 nginx nginx 13504 Jan 17 14:21 tbl_replace.php
-rw-r--r--.  1 nginx nginx  3904 Jan 17 14:21 tbl_row_action.php
-rw-r--r--.  1 nginx nginx  2175 Jan 17 14:21 tbl_select.php
-rw-r--r--.  1 nginx nginx  1014 Jan 17 14:21 tbl_sql.php
-rw-r--r--.  1 nginx nginx  4577 Jan 17 14:21 tbl_structure.php
-rw-r--r--.  1 nginx nginx  3927 Jan 17 14:21 tbl_tracking.php
-rw-r--r--.  1 nginx nginx   144 Jan 17 14:21 tbl_triggers.php
-rw-r--r--.  1 nginx nginx  5996 Jan 17 14:21 tbl_zoom_select.php
drwxr-xr-x.  4 nginx nginx  4096 Jan 23 15:00 themes
-rw-r--r--.  1 nginx nginx   863 Jan 17 14:21 themes.php
-rw-r--r--.  1 nginx nginx  1348 Jan 17 14:21 transformation_overview.php
-rw-r--r--.  1 nginx nginx  3961 Jan 17 14:21 transformation_wrapper.php
-rw-r--r--.  1 nginx nginx   507 Jan 17 14:21 url.php
-rw-r--r--.  1 nginx nginx  6883 Jan 17 14:21 user_password.php
-rw-r--r--.  1 nginx nginx   550 Jan 17 14:21 version_check.php
-rw-r--r--.  1 nginx nginx  8914 Jan 17 14:21 view_create.php
-rw-r--r--.  1 nginx nginx  3613 Jan 17 14:21 view_operations.php
-rw-r--r--.  1 nginx nginx  1128 Jan 17 14:21 webapp.php

Answer 1

I've found the solution.

The /var/lib/php/session/ folder was not writeable by nginx/php-fpm, I've just edited the permissions to 777 and now it works.