first commit

application/helpers/validation_helper.php

@@ -0,0 +1,26 @@
+<?php defined('BASEPATH') or exit('No direct script access allowed');
+
+/* ----------------------------------------------------------------------------
+ * Easy!Appointments - Online Appointment Scheduler
+ *
+ * @package     EasyAppointments
+ * @author      A.Tselegidis <alextselegidis@gmail.com>
+ * @copyright   Copyright (c) Alex Tselegidis
+ * @license     https://opensource.org/licenses/GPL-3.0 - GPLv3
+ * @link        https://easyappointments.org
+ * @since       v1.0.0
+ * ---------------------------------------------------------------------------- */
+
+/**
+ * Validate a date time value.
+ *
+ * @param string $value Validation value.
+ *
+ * @return bool Returns the validation result.
+ */
+function validate_datetime(string $value): bool
+{
+    $date_time = DateTime::createFromFormat('Y-m-d H:i:s', $value);
+
+    return (bool) $date_time;
+}