Steps to reproduce

1. Log in with a locale other than english
2. Search on the database. Select search in all tables. Any search term will do.

Expected behaviour

Search returns results. You can see expected behaviour if your locale is "en"

Actual behaviour

I get an error message (locale dependant):
Error al procesar la petición
Código de error: 500
Texto de error: Internal Server Error

Error in php error log:
[09-Jan-2017 09:42:56 Europe/Madrid] PHP Fatal error: Uncaught exception 'InvalidArgumentException' with message 'Select_string only accepts integers: 2883' in /usr/share/php/gettext/gettext.php:354
Stack trace:
#0 /usr/share/php/gettext/gettext.php(388): gettext_reader->select_string('2883')
#1 /usr/share/php/gettext/gettext.inc(293): gettext_reader->ngettext('%1$s match in <...', '%1$s matches in...', '2883')
#2 /usr/share/phpMyAdmin/libraries/DbSearch.php(331): _ngettext('%1$s match in <...', '%1$s matches in...', '2883')
#3 /usr/share/phpMyAdmin/libraries/DbSearch.php(283): PMA\libraries\DbSearch->_getResultsRow('MD5FaMiLyBeEr5M...', Array, true, '2883')
#4 /usr/share/phpMyAdmin/db_search.php(57): PMA\libraries\DbSearch->getSearchResults()
#5 {main}
thrown in /usr/share/php/gettext/gettext.php on line 354

Seems the problem is select_string only accepts integers but it is being passed a string because all mysql values are returned as strings and the value is not casted as integer.

Suggested fix (at least works for me):

diff -u /usr/share/phpMyAdmin/libraries/DbSearch.php.patched /usr/share/phpMyAdmin/libraries/DbSearch.php
--- /usr/share/phpMyAdmin/libraries/DbSearch.php.patched	2017-01-09 09:37:48.659142822 +0100
+++ /usr/share/phpMyAdmin/libraries/DbSearch.php	2017-01-09 09:37:58.032210548 +0100
@@ -279,7 +279,7 @@
             $num_search_result_total += $res_cnt;
             // Gets the result row's HTML for a table
             $html_output .= $this->_getResultsRow(
-                $each_table, $newsearchsqls, $odd_row, intval($res_cnt)
+                $each_table, $newsearchsqls, $odd_row, $res_cnt
             );
             $odd_row = ! $odd_row;
         } // end for

Server configuration

Operating system: CentOS 6

Web server: Apache 2.4.18

Database: mySQL 5.6.34

PHP version: PHP 5.5.21

phpMyAdmin version:

Client configuration

Browser: Firefox 50.1

Operating system: XUbuntu 16.04