diff --git a/www/admin/class_test.array.php b/www/admin/class_test.array.php
index eef96c21..cc1789b3 100644
--- a/www/admin/class_test.array.php
+++ b/www/admin/class_test.array.php
@@ -21,6 +21,7 @@ ob_end_flush();
 use CoreLibs\Combined\ArrayHandler;
 use CoreLibs\Debug\Support as DgS;
 use CoreLibs\Convert\SetVarType;
+use PHPUnit\Framework\Constraint\ArrayHasKey;
 
 $log = new CoreLibs\Logging\Logging([
 	'log_folder' => BASE . LOG,
@@ -236,6 +237,22 @@ $flag = false;
 $output = \CoreLibs\Combined\ArrayHandler::genAssocArray($db_array, $key, $value, $flag);
 print "OUTPUT: " . \CoreLibs\Debug\Support::printAr($output) . "<br>";
 
+
+print "<hr>";
+$array = [
+	'a' => 'First',
+	'b' => 'Second',
+	'c' => 'Third',
+];
+
+foreach (array_keys($array) as $search) {
+	print "Result[" . $search . "]: "
+		. "next: " . DgS::printAr(ArrayHandler::arrayGetNextKey($array, $search)) . ", "
+		. "prev: " . DgS::printAr(ArrayHandler::arrayGetPrevKey($array, $search))
+		. "<br>";
+}
+print "Key not exists: " . DgS::printAr(ArrayHandler::arrayGetNextKey($array, 'z')) . "<br>";
+
 print "</body></html>";
 
 // __END__
diff --git a/www/admin/class_test.db.query-placeholder.php b/www/admin/class_test.db.query-placeholder.php
index 6da93482..da052c4e 100644
--- a/www/admin/class_test.db.query-placeholder.php
+++ b/www/admin/class_test.db.query-placeholder.php
@@ -115,6 +115,8 @@ echo "INSERT ALL COLUMN TYPES: "
 	. "ERROR: " . $db->dbGetLastError(true) . "<br>";
 echo "<hr>";
 
+// test connectors: = , <> () for query detection
+
 // convert placeholder tests
 // ? -> $n
 // :name -> $n