Add exams from exam156 to exam199

exam187/customErrorMessage.php

@@ -0,0 +1,35 @@
+<?php
+
+$mysql_db = 'example_database';
+$mysql_host = 'localhost';
+$mysql_user = 'example_user';
+$mysql_pass = 'Kolosnjaj4321!';
+
+class DatabaseException extends Exception
+{
+    public function showSpecific()
+    {
+        return 'Error thrown on line' . $this->getLine() . ' in ' . $this->getFile();
+    }
+}
+class ServerException extends Exception
+{
+    public function showSpecific()
+    {
+        return 'Error thrown on line' . $this->getLine() . ' in ' . $this->getFile();
+    }
+}
+
+try {
+    if (!@$con = mysqli_connect($mysql_host, $mysql_user, $mysql_pass)) {
+        throw new ServerException();
+    } else if (!@mysqli_select_db($con, $mysql_db)) {
+        throw new DatabaseException();
+    } else {
+        echo 'Connected';
+    }
+} catch (ServerException $ex) {
+    echo  $ex->showSpecific();
+} catch (DatabaseException $ex) {
+    echo $ex->showSpecific();
+}