From bdec39bd6e1ec01d5db17bead4b6f636a3dae162 Mon Sep 17 00:00:00 2001
From: "Edward F Long, Jr" <edl@aweber.com>
Date: Wed, 19 Sep 2012 14:56:49 -0400
Subject: [PATCH] fix update on fields with initially null values

fix updates on fields with initially null values.

we were using isset() instead of array_key_exists()
replace usage of isset with array_key_exists
---
 README.md                        | 4 ++++
 aweber_api/aweber.php            | 2 +-
 aweber_api/aweber_collection.php | 2 +-
 aweber_api/aweber_entry.php      | 2 +-
 aweber_api/aweber_response.php   | 2 +-
 5 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index fab74d2..593640b 100644
--- a/README.md
+++ b/README.md
@@ -61,6 +61,10 @@ subscriber information.
 
 Changelog:
 ----------
+2012-09-19: v1.1.6
+  * Fixed a bug that prevented resource attributes from being saved when the initial value of the resource attribute was null.
+    * used array_key_exists instead of isset for evaluation of associative arrays.  Requires PHP >= 4.0.7
+
 2012-07-05: v1.1.5
   * Fixed a bug were a utf8_encode notice was raised when updating subscriber custom field values.
 
diff --git a/aweber_api/aweber.php b/aweber_api/aweber.php
index cad360f..792dc89 100644
--- a/aweber_api/aweber.php
+++ b/aweber_api/aweber.php
@@ -122,7 +122,7 @@ protected function readResponse($response, $url) {
         $this->adapter->parseAsError($response);
         if (!empty($response['id'])) {
             return new AWeberEntry($response, $url, $this->adapter);
-        } else if (isset($response['entries'])) {
+        } else if (array_key_exists('entries', $response)) {
             return new AWeberCollection($response, $url, $this->adapter);
         }
         return false;
diff --git a/aweber_api/aweber_collection.php b/aweber_api/aweber_collection.php
index 0becab3..9f65f19 100644
--- a/aweber_api/aweber_collection.php
+++ b/aweber_api/aweber_collection.php
@@ -151,7 +151,7 @@ protected function _type() {
      * @return integer
      */
     protected function _calculatePageSize() {
-        if (isset($this->data['next_collection_link'])) {
+        if (array_key_exists('next_collection_link', $this->data)) {
             $url = $this->data['next_collection_link'];
             $urlParts = parse_url($url);
             if (empty($urlParts['query'])) return $this->pageSize;
diff --git a/aweber_api/aweber_entry.php b/aweber_api/aweber_entry.php
index c89c578..3492f38 100644
--- a/aweber_api/aweber_entry.php
+++ b/aweber_api/aweber_entry.php
@@ -159,7 +159,7 @@ public function __get($value) {
      * @access public
      */
     public function __set($key, $value) {
-        if (isset($this->data[$key])) {
+        if (array_key_exists($key, $this->data)) {
             $this->_localDiff[$key] = $value;
             return $this->data[$key] = $value;
         } else {
diff --git a/aweber_api/aweber_response.php b/aweber_api/aweber_response.php
index a688e3f..5d021a2 100644
--- a/aweber_api/aweber_response.php
+++ b/aweber_api/aweber_response.php
@@ -62,7 +62,7 @@ public function __get($value) {
         if (in_array($value, $this->_privateData)) {
             return null;
         }
-        if (isset($this->data[$value])) {
+        if (array_key_exists($value, $this->data)) {
             return $this->data[$value];
         }
         if ($value == 'type') return $this->_type();