increase minimum version requirement to PHP 5.6

.travis.yml

@@ -1,13 +1,10 @@
 language: php
 sudo: false
 php:
+  - "nightly"
   - "7.1"
   - "7.0"
   - "5.6"
-  - "5.5"
-  - "5.4"
-  - "5.3"
-
 env:
   - DISABLE_FUNCTIONS=
   - DISABLE_FUNCTIONS="gzopen"
@@ -30,6 +27,7 @@ matrix:
       env: DISABLE_FUNCTIONS=
   allow_failures:
     - php: "hhvm"
+    - php: "nightly"
   exclude:
     - php: "hhvm"
       env: DISABLE_FUNCTIONS="gzopen"

composer.json

@@ -5,7 +5,7 @@
     "type": "project",
     "license": "GPL v2",
     "require": {
-        "php": ">=5.3",
+        "php": ">=5.6",
         "splitbrain/php-archive": "~1.0",
         "easybook/geshi": "~1.0",
         "phpseclib/phpseclib": "~2.0",

inc/infoutils.php

@@ -114,13 +114,13 @@ function check(){
     if ($INFO['isadmin'] || $INFO['ismanager']){
         msg('DokuWiki version: '.getVersion(),1);
 
-        if(version_compare(phpversion(),'5.3.3','<')){
-            msg('Your PHP version is too old ('.phpversion().' vs. 5.3.3+ needed)',-1);
+        if(version_compare(phpversion(),'5.6.0','<')){
+            msg('Your PHP version is too old ('.phpversion().' vs. 5.6.0+ needed)',-1);
         }else{
             msg('PHP version '.phpversion(),1);
         }
     } else {
-        if(version_compare(phpversion(),'5.3.3','<')){
+        if(version_compare(phpversion(),'5.6.0','<')){
             msg('Your PHP version is too old',-1);
         }
     }

install.php

@@ -560,8 +560,8 @@ function check_functions(){
     global $lang;
     $ok = true;
 
-    if(version_compare(phpversion(),'5.3.3','<')){
-        $error[] = sprintf($lang['i_phpver'],phpversion(),'5.3.3');
+    if(version_compare(phpversion(),'5.6.0','<')){
+        $error[] = sprintf($lang['i_phpver'],phpversion(),'5.6.0');
         $ok = false;
     }