diff --git a/app/classes/validator.php b/app/classes/validator.php
new file mode 100644
index 0000000..cf6717c
--- /dev/null
+++ b/app/classes/validator.php
@@ -0,0 +1,102 @@
+<?php
+
+class Validator {
+    private $errors = [];
+    private $data = [];
+
+    public function __construct(array $data) {
+        $this->data = $data;
+    }
+
+    public function validate(array $rules) {
+        foreach ($rules as $field => $fieldRules) {
+            foreach ($fieldRules as $rule => $parameter) {
+                $this->applyRule($field, $rule, $parameter);
+            }
+        }
+        return empty($this->errors);
+    }
+
+    private function applyRule($field, $rule, $parameter) {
+        $value = $this->data[$field] ?? null;
+
+        switch ($rule) {
+            case 'required':
+                if ($parameter && empty($value)) {
+                    $this->addError($field, "Field is required");
+                }
+                break;
+            case 'email':
+                if (!empty($value) && !filter_var($value, FILTER_VALIDATE_EMAIL)) {
+                    $this->addError($field, "Invalid email format");
+                }
+                break;
+            case 'min':
+                if (!empty($value) && strlen($value) < $parameter) {
+                    $this->addError($field, "Minimum length is $parameter characters");
+                }
+                break;
+            case 'max':
+                if (!empty($value) && strlen($value) > $parameter) {
+                    $this->addError($field, "Maximum length is $parameter characters");
+                }
+                break;
+            case 'numeric':
+                if (!empty($value) && !is_numeric($value)) {
+                    $this->addError($field, "Must be a number");
+                }
+                break;
+            case 'phone':
+                if (!empty($value) && !preg_match('/^[+]?[\d\s-()]{7,}$/', $value)) {
+                    $this->addError($field, "Invalid phone number format");
+                }
+                break;
+            case 'url':
+                if (!empty($value) && !filter_var($value, FILTER_VALIDATE_URL)) {
+                    $this->addError($field, "Invalid URL format");
+                }
+                break;
+            case 'date':
+                if (!empty($value)) {
+                    $date = date_parse($value);
+                    if ($date['error_count'] > 0) {
+                        $this->addError($field, "Invalid date format");
+                    }
+                }
+                break;
+            case 'in':
+                if (!empty($value) && !in_array($value, $parameter)) {
+                    $this->addError($field, "Invalid option selected");
+                }
+                break;
+            case 'matches':
+                if ($value !== ($this->data[$parameter] ?? null)) {
+                    $this->addError($field, "Does not match $parameter field");
+                }
+                break;
+        }
+    }
+
+    private function addError($field, $message) {
+        if (!isset($this->errors[$field])) {
+            $this->errors[$field] = [];
+        }
+        $this->errors[$field][] = $message;
+    }
+
+    public function getErrors() {
+        return $this->errors;
+    }
+
+    public function hasErrors() {
+        return !empty($this->errors);
+    }
+
+    public function getFirstError() {
+        if (!$this->hasErrors()) {
+            return null;
+        }
+        $firstField = array_key_first($this->errors);
+        return $this->errors[$firstField][0];
+    }
+}