bug 3078: avoid zlib issue on Ubuntu 14.04 (PHP 5.5) and maybe other systems

git-svn-id: http://piwigo.org/svn/trunk@29904 68402e56-0260-453c-a942-63ccdbb3a9ee

include/common.inc.php

@@ -72,8 +72,10 @@ $header_msgs = array();
 $header_notes = array();
 $filter = array();
 
-foreach( array(
-  ) as $func)
+foreach(
+  array(
+    'gzopen'
+    ) as $func)
 {
   if (!function_exists($func))
   {

include/php_compat/gzopen.php

@@ -0,0 +1,9 @@
+<?php
+if (!function_exists('gzopen') && function_exists('gzopen64'))
+{
+  function gzopen(string $filename , string $mode, int $use_include_path = null)
+  {
+    return gzopen64($filename, $mode, $use_include_path);
+  }
+}
+?>