diff --git a/demos/php/get-events.php b/demos/php/get-events.php
index 2902278..5b7b388 100644
--- a/demos/php/get-events.php
+++ b/demos/php/get-events.php
@@ -6,11 +6,11 @@
 //
 // An optional "timezone" GET parameter will force all ISO8601 date stings to a given timezone.
 //
-// Requires PHP 5.3.0 or higher.
+// Requires PHP 5.2.0 or higher.
 //--------------------------------------------------------------------------------------------------
 
 // Require our Event class and datetime utilities
-require __DIR__ . '/utils.php';
+require dirname(__FILE__) . '/utils.php';
 
 // Short-circuit if the client did not give us a date range.
 if (!isset($_GET['start']) || !isset($_GET['end'])) {
@@ -30,7 +30,7 @@ if (isset($_GET['timezone'])) {
 }
 
 // Read and parse our events JSON file into an array of event data arrays.
-$json = file_get_contents(__DIR__ . '/../json/events.json');
+$json = file_get_contents(dirname(__FILE__) . '/../json/events.json');
 $input_arrays = json_decode($json, true);
 
 // Accumulate an output array of event data arrays.
diff --git a/demos/php/get-timezones.php b/demos/php/get-timezones.php
index afa0bfb..241e1bd 100644
--- a/demos/php/get-timezones.php
+++ b/demos/php/get-timezones.php
@@ -3,7 +3,7 @@
 //--------------------------------------------------------------------------------------------------
 // This script outputs a JSON array of all timezones (like "America/Chicago") that PHP supports.
 //
-// Requires PHP 5.3.0 or higher.
+// Requires PHP 5.2.0 or higher.
 //--------------------------------------------------------------------------------------------------
 
 echo json_encode(DateTimeZone::listIdentifiers());
\ No newline at end of file
diff --git a/demos/php/utils.php b/demos/php/utils.php
index fbd6cdb..a42c7d7 100644
--- a/demos/php/utils.php
+++ b/demos/php/utils.php
@@ -3,7 +3,7 @@
 //--------------------------------------------------------------------------------------------------
 // Utilities for our event-fetching scripts.
 //
-// Requires PHP 5.3.0 or higher.
+// Requires PHP 5.2.0 or higher.
 //--------------------------------------------------------------------------------------------------
 
 // PHP will fatal error if we attempt to use the DateTime class without this being set.
@@ -111,7 +111,7 @@ class Event {
 function parseDateTime($string, $timezone=null) {
 	$date = new DateTime(
 		$string,
-		$timezone ?: new DateTimeZone('UTC')
+		$timezone ? $timezone : new DateTimeZone('UTC')
 			// Used only when the string is ambiguous.
 			// Ignored if string has a timezone offset in it.
 	);