updated class.recordversion.php to format date into strict datetime

format for mysql databases. Also define the default value to fix the
same strict enforcement

backend/php/src/objects/class.record.php

@@ -127,7 +127,7 @@ class record extends POG_Base
 			$this->version = $this->Unescape($row['version']);
 			$this->creation_date = $row['creation_date'];
 			$oDate = strtotime($row['update_date']);
-			$this->update_date = date('r', $oDate);
+			$this->update_date = date('Y-m-d H:i:s', $oDate);
 			$this->access_date = $row['access_date'];
 		}
 		return $this;
@@ -220,7 +220,7 @@ class record extends POG_Base
 			$record->version = $this->Unescape($row['version']);
 			$record->creation_date = $row['creation_date'];
 			$oDate = strtotime($row['update_date']);
-			$record->update_date = date('r', $oDate);
+			$record->update_date = date('Y-m-d H:i:s', $oDate);
 			$record->access_date = $row['access_date'];
 			$recordList[] = $record;
 		}
@@ -235,8 +235,8 @@ class record extends POG_Base
 	function Save($deep = true)
 	{
 		$connection = Database::Connect();
-		$this->update_date = date( 'r');
-		$this->access_date = date( 'r');
+		$this->update_date = date( 'Y-m-d H:i:s');
+		$this->access_date = date( 'Y-m-d H:i:s');
 		$this->pog_query = "select `recordid` from `record` where `recordid`='".$this->recordId."' LIMIT 1";
 		$rows = Database::Query($this->pog_query, $connection);
 		if ($rows > 0)

backend/php/src/objects/class.recordversion.php

@@ -111,7 +111,7 @@ class recordversion extends POG_Base
 		}
 	}
 	
-	function recordversion($reference='', $header='', $data='', $version='', $previous_version_key='', $previous_version_id='', $creation_date='', $update_date='', $access_date='')
+	function recordversion($reference='', $header='', $data='', $version='', $previous_version_key='', $previous_version_id='0', $creation_date='', $update_date='', $access_date='')
 	{
 		$this->reference = $reference;
 		$this->header = $header;
@@ -119,7 +119,7 @@ class recordversion extends POG_Base
 		$this->version = $version;
 		$this->previous_version_key = $previous_version_key;
 		$this->previous_version_id = $previous_version_id;
-		$this->creation_date = $creation_date;
+		$this->creation_date = date( 'Y-m-d H:i:s');
 		$this->update_date = $update_date;
 		$this->access_date = $access_date;
 	}