Fixes #3877, add warning message that is displayed if a user's PHP ve…

…rsion is less than 5.3.

core/Controller/Admin.php

@@ -61,5 +61,17 @@ static public function setBasicVariablesAdminView($view)
                                                                                                        '</a>'
                                                                                                   ));
         }
+
+        self::checkPhpVersion($view);
+    }
+
+    /**
+     * Check if the current PHP version is >= 5.3. If not, a warning is displayed
+     * to the user.
+     */
+    private static function checkPhpVersion($view)
+    {
+        $view->phpVersion = PHP_VERSION;
+        $view->phpIsNewEnough = version_compare($view->phpVersion, '5.3.0', '>=');
     }
 }

lang/en.php

@@ -521,6 +521,9 @@
 'CoreAdminHome_StableReleases' => 'If Piwik is a critical part of your business, we recommend you use the latest stable release.
 
 If you use the latest beta and you find a bug or have a suggestion, please %ssee here%s.',
+  'CoreAdminHome_YouAreCurrentlyUsingPHP' => 'You are currently using PHP %1$s.',
+  'CoreAdminHome_OldPHPVersionWarning_Part1' => 'Piwik is quickly improving and in order to provide you with an improved state-of-the-art Web Analytics platform, we will soon be increasing the minimum required PHP version to PHP 5.3. %1$sPlease ask your server administrator or web hosting provider to update your PHP to the latest version, ideally PHP 5.4.%2$s',
+  'CoreAdminHome_OldPHPVersionWarning_Part2' => 'When you upgrade to PHP 5.3 or higher, this message will disappear and your Piwik server will process reports much faster using less memory. %1$sUpdate PHP and get the most out of Piwik!%2$s',
 	'CoreHome_InjectedHostWarningIntro' => 'You are now accessing Piwik from %1$s, but Piwik has been configured to run at this address: %2$s.',
 	'CoreHome_InjectedHostSuperUserWarning' => 'Piwik may be misconfigured (for example, if Piwik was recently moved to a new server or URL). You can either %1$sclick here and add %2$s as the valid Piwik hostname (if you trust it)%3$s, or %4$sclick here and go to %5$s to access Piwik safely%6$s.',
 	'CoreHome_InjectedHostNonSuperUserWarning' => '%1$sClick here to access Piwik safely%2$s and remove this warning. You may also want to contact your Piwik administrator and notify them about this issue (%3$sclick here to email%4$s).',

plugins/CoreAdminHome/templates/header.tpl

@@ -66,6 +66,17 @@
             </div>
 
             {include file="CoreHome/templates/warning_invalid_host.tpl"}
+
+            {* PHP version < 5.3 warning *}
+            {if empty($phpIsNewEnough)}
+                <div class="ajaxSuccess">
+                    <strong><em>{'CoreAdminHome_YouAreCurrentlyUsingPHP'|translate:$phpVersion}</em></strong>
+                    <br/><br/>
+                    {'CoreAdminHome_OldPHPVersionWarning_Part1'|translate:'<strong><em>':'</em></strong>'}
+                    <br/><br/>
+                    {'CoreAdminHome_OldPHPVersionWarning_Part2'|translate:'<strong><em>':'</em></strong>'}
+                </div>
+            {/if}
 
             {* missing plugins warning *}
             {if $isSuperUser && !empty($missingPluginsWarning)}