Show error if PHP version below 5.6 is used

index.php

@@ -25,10 +25,10 @@
  *
  */
 
-// Show warning if a PHP version below 5.4.0 is used, this has to happen here
-// because base.php will already use 5.4 syntax.
-if (version_compare(PHP_VERSION, '5.4.0') === -1) {
-	echo 'This version of ownCloud requires at least PHP 5.4.0<br/>';
+// Show warning if a PHP version below 5.6.0 is used, this has to happen here
+// because base.php will already use 5.6 syntax.
+if (version_compare(PHP_VERSION, '5.6.0') === -1) {
+	echo 'This version of ownCloud requires at least PHP 5.6.0<br/>';
 	echo 'You are currently running ' . PHP_VERSION . '. Please update your PHP version.';
 	return;
 }