From 52344cb8adc1e7dce71e9cda48b649d7db2c4bc8 Mon Sep 17 00:00:00 2001
From: ezyang <ezyang>
Date: Thu, 9 Sep 2010 04:44:14 +0000
Subject: [PATCH] Give friendly error message if running in PHP 4. Fixes
 #764974

---
 CHANGELOG.txt        |  1 +
 htmlpurifier.install | 10 ++++++++++
 htmlpurifier.module  | 10 +++++++++-
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 5493146..187a75c 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -3,6 +3,7 @@
 - Fixed #819728; make use of Filter.ExtractStyleBlocks.  Thanks
   Vector- for contributing the patch.
 - Fixed #586746; Rate limit new version checks
+- Fixed #764974: Give friendly error message if running under PHP4
 - Deprecated Filter.YouTube in favor of SafeObject/FlashCompat.
   Thanks John Morahan for contributing the patch.
 
diff --git a/htmlpurifier.install b/htmlpurifier.install
index 830f50f..530e98e 100644
--- a/htmlpurifier.install
+++ b/htmlpurifier.install
@@ -38,9 +38,19 @@ function htmlpurifier_uninstall() {
 function htmlpurifier_requirements($phase) {
   // This version of HTML Purifier is required
   static $req_version = '4.0.0';
+  static $req_php_version = '5.0.0';
   $requirements = array();
   $t = get_t();
 
+  if (version_compare(phpversion(), $req_php_version) < 0) {
+    $requirements['htmlpurifier_php'] = array (
+      'title' => $t('PHP version for HTML Purifier library'),
+      'severity' => REQUIREMENT_ERROR,
+      'description' => $t('PHP version is too low to run HTML Purifier.  HTML Purifier requires PHP 5 or later.'),
+    );
+    return $requirements;
+  }
+
   // HACK: If libraries api module is not installed but available, load
   // it.  This can arise when an install profile is installing multiple
   // modules, because the HTMLPurifier module does not publish a
diff --git a/htmlpurifier.module b/htmlpurifier.module
index e4cbf00..abe4102 100644
--- a/htmlpurifier.module
+++ b/htmlpurifier.module
@@ -1,5 +1,5 @@
 <?php
-// $Id: htmlpurifier.module,v 1.19 2010/08/15 23:22:55 ezyang Exp $
+// $Id: htmlpurifier.module,v 1.20 2010/09/09 04:44:14 ezyang Exp $
 
 /**
  * @file
@@ -277,6 +277,14 @@ function _htmlpurifier_load() {
     }
   }
 
+  if (version_compare(phpversion(), '5') < 0 || true) {
+    // If your version of PHP is too old, you're going to fail anyway
+    // when you attempt to include the HTML Purifier library, so we
+    // might as well try to give a useful error message.
+    echo 'Your version of PHP is too old to run HTML Purifier, needs PHP 5 or later';
+    exit;
+  }
+
   require_once "$library_path/library/HTMLPurifier.auto.php";
   require_once "$module_path/HTMLPurifier_DefinitionCache_Drupal.php";
 
-- 
2.11.4.GIT