diff --git a/upload.php b/upload.php
index ac7b70f..58e92f1 100644
--- a/upload.php
+++ b/upload.php
@@ -1,6 +1,6 @@
 <?php
-//Imeji Uploader Core Code -- Version 1.2b (Migrations Phase 1)
-$imejicoreversion = "imeji_v1.2b_S_p1";
+//Imeji Uploader Core Code -- Version 1.3 (Uploader Filename Randomizer Algorithm Update)
+$imejicoreversion = "imeji_v1.3_0";
 $target_dir = "public/";
 $target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
 $target_filenameonly = basename($_FILES["fileToUpload"]["name"]);
@@ -46,18 +46,50 @@ if ($uploadOk == 0) {
     header('Location: ./failed.php');
 // if everything is ok, try to upload file
 } else {
-    // 1.2a -- Changed some case-confusing characters such as I and O to web safe symbols.
-    $characters = 'abcdefghjklmnpqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ1234567890-_!$+*';
-    $random_string_length = 12;
+    // 1.2a --- Changed some case-confusing characters such as I and O to web safe symbols.
+    // 1.3 ---- Removed some problematic symbol characters that can break CMS such as + and $.
+    // 1.3_0 -- Changed the filename randomizer algorithm to compensate for characters pool reduction to 62 from 64.
+    $characters = 'abcdefghjklmnpqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ1234567890-_!*';
+    $random_string_length = 10;
     $randomFilename = '';
     for ($i = 0; $i < $random_string_length; $i++) {
       $randomFilename .= $characters[rand(0, strlen($characters) - 1)];
     }
+    // Day-base identifiers (Implemented in v1.3_0)
+    if (date('D') == 'Sun') {
+        $dayId = 'Q';
+    } else if (date('D') == 'Mon') {
+        $dayId = 'a';
+    } else if (date('D') == 'Tue') {
+        $dayId = 'z';
+    } else if (date('D') == 'Wed') {
+        $dayId = '2';
+    } else if (date('D') == 'Thu') {
+        $dayId = 'W';
+    } else if (date('D') == 'Fri') {
+        $dayId = 's';
+    } else if (date('D') == 'Sat') {
+        $dayId = 'x';
+    } else {
+        $dayId = '0';
+    }
+    // Hour-base identifiers (Implemented in v1.3_0)
+    if ((date('H') >= '00') && (date('H') <= '05')) {
+        $hourId = '3';
+    } else if ((date('H') >= '06') && (date('H') <= '11')) {
+        $hourId = 'E';
+    } else if ((date('H') >= '12') && (date('H') <= '17')) {
+        $hourId = 'd';
+    } else if ((date('H') >= '18') && (date('H') <= '23')) {
+        $hourId = 'C';
+    } else {
+        $hourId = 'z';
+    }
     //$newfilename = time() . '_' . rand(1000000, 9999999) . '.' . end(explode(".",$_FILES["fileToUpload"]["name"])); --prior to v0.6b
     //$newfilename = time() . '_' . rand(100, 999) . '_' . rand(100000000, 999999999) . '.' . end(explode(".",$_FILES["fileToUpload"]["name"])); --prior to v0.8
+    //$newfilename = $randomFilename . '.' . end(explode(".",$_FILES["fileToUpload"]["name"]));
     $newfilename = $randomFilename . '.' . end(explode(".",$_FILES["fileToUpload"]["name"]));
     $newtarget = $target_dir . $newfilename;
-    //if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
     if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $newtarget)) {
         chmod("$newtarget", 0775); // Set read and write permissions if file
         echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.";