diff --git a/distfiles/partentry.php b/distfiles/partentry.php
index 08a5490..ed7ba64 100644
--- a/distfiles/partentry.php
+++ b/distfiles/partentry.php
@@ -17,17 +17,17 @@ if (!isset($_SESSION['login'])) {
 $loggedinas=$_SESSION['login'];
 $isadmin=dblookup($db,"techs","techid","admin",$loggedinas);
 
-$print=$_REQUEST['print'];
-$add=$_REQUEST['add'];
-$edit=$_REQUEST['edit'];
-$delete=$_REQUEST['delete'];
+$print=$_REQUEST['print'] ?? NULL;
+$add=$_REQUEST['add'] ?? NULL;
+$edit=$_REQUEST['edit'] ?? NULL;
+$delete=$_REQUEST['delete'] ?? NULL;
 
-$partid=$_REQUEST['partid'];
-$uid=$_REQUEST['uid'];
-$partnum=$_REQUEST['partnum'];
-$sernum=$_REQUEST['sernum'];
-$partname=$_REQUEST['partname'];
-$submit=$_REQUEST['submit'];
+$partid=$_REQUEST['partid'] ?? NULL;
+$uid=$_REQUEST['uid'] ?? NULL;
+$partnum=$_REQUEST['partnum'] ?? NULL;
+$sernum=$_REQUEST['sernum'] ?? NULL;
+$partname=$_REQUEST['partname'] ?? NULL;
+$submit=$_REQUEST['submit'] ?? NULL;
 
 $logname=LOG_NAME;
 $uidtext=UID_TEXT;
@@ -96,13 +96,13 @@ $partdatainput=array();
 $partdatainput['partid']=$partid;
 $partinfo=get_part_data($partdatainput);
 if ($partinfo['result']==2) {
-        $pdatamismatch=1;
+        $pdatamismatch=TRUE;
 } else {
-    unset($pdatamismatch);
-    if ($partinfo['uid']) $uid=$partinfo['uid'];
-    if ($partinfo['partnum']) $partnum=$partinfo['partnum'];
-    if ($partinfo['sernum']) $sernum=$partinfo['sernum'];
-    if ($partinfo['partname']) $partname=$partinfo['partname'];
+    $pdatamismatch=FALSE;
+    $uid = (array_key_exists('uid',$partinfo)) ? $partinfo['uid'] : NULL;
+    $partnum = (array_key_exists('partnum',$partinfo)) ? $partinfo['partnum'] : NULL;
+    $sernum = (array_key_exists('sernum',$partinfo)) ? $partinfo['sernum'] : NULL;
+    $partname = (array_key_exists('partname',$partinfo)) ? $partinfo['partname'] : NULL;
 }
 if ($delete) {
     if ($inmaintforms) {