Add basic input validation class

classen/FormValidator.php

@@ -0,0 +1,25 @@
+<?php
+class FormValidator {
+
+    private array $fieldValidation;
+
+    public function __construct(array $fieldValidation) {
+        $this->fieldValidation = $fieldValidation;
+    }
+
+    public function isValid(array $req) {
+        foreach($fieldValidation as $field => $params) {
+            if($params['required'] && !isset($req[$field])) {
+                return false;
+            }
+
+            if(isset($params['regex']) && !preg_match($params['regex'], $req[$field])) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+}
+?>