From dbc8204ab1e8a29f087260ba05c0796c77527636 Mon Sep 17 00:00:00 2001
From: David Goodwin <david@palepurple.co.uk>
Date: Fri, 18 Sep 2015 05:10:13 +0000
Subject: [PATCH] try and support older versions of PHP (e.g 5.3) which do not
 support closures etc

git-svn-id: https://svn.code.sf.net/p/postfixadmin/code/trunk@1798 a1433add-5e2c-0410-b055-b7f2511e0802
---
 upgrade.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/upgrade.php b/upgrade.php
index 4f53fd99..a071ce20 100644
--- a/upgrade.php
+++ b/upgrade.php
@@ -71,6 +71,9 @@ function _db_field_exists($table, $field) {
         return _mysql_field_exists($table, $field);
     }
 }
+function _upgrade_filter_function($name) {
+    return preg_match('/upgrade_[\d]+(_mysql|_pgsql)?$/', $name) == 1; 
+}
 
 function _db_add_field($table, $field, $fieldtype, $after) {
     global $CONF;
@@ -141,7 +144,8 @@ function _do_upgrade($current_version) {
     $target_version = 0;
     // Rather than being bound to an svn revision number, just look for the largest function name that matches upgrade_\d+...
     // $target_version = preg_replace('/[^0-9]/', '', '$Revision$');
-    $our_upgrade_functions = array_filter(get_defined_functions()['user'], function($name) { return preg_match('/upgrade_[\d]+(_mysql|_pgsql)?$/', $name) == 1; } );
+    $funclist = get_defined_functions();
+    $our_upgrade_functions = array_filter($funclist['user'], '_upgrade_filter_function');
     foreach($our_upgrade_functions as $function_name) {
         $bits = explode("_", $function_name);
         $function_number = $bits[1];