Twofactor authentication and strong password

application/helpers/common_helper.php

@@ -304,3 +304,62 @@ function unique_multidim_array( $array, $key )
 
     return $temp_array;
 }
+
+/**
+ * Validate password strength
+ * Password must contain:
+ * - At least 8 characters
+ * - At least 1 uppercase letter
+ * - At least 1 lowercase letter
+ * - At least 1 number
+ * - At least 1 special character
+ *
+ * @param string $password The password to validate
+ * @return bool True if password meets all requirements
+ */
+if ( ! function_exists( 'validate_password_strength' ) )
+{
+    function validate_password_strength( $password )
+    {
+        if ( strlen( $password ) < 8 ) {
+            return FALSE;
+        }
+
+        if ( ! preg_match( '/[A-Z]/', $password ) ) {
+            return FALSE;
+        }
+
+        if ( ! preg_match( '/[a-z]/', $password ) ) {
+            return FALSE;
+        }
+
+        if ( ! preg_match( '/[0-9]/', $password ) ) {
+            return FALSE;
+        }
+
+        if ( ! preg_match( '/[^A-Za-z0-9]/', $password ) ) {
+            return FALSE;
+        }
+
+        return TRUE;
+    }
+}
+
+/**
+ * Get password validation requirements in Dutch
+ *
+ * @return array Array of password requirements
+ */
+if ( ! function_exists( 'get_password_requirements_nl' ) )
+{
+    function get_password_requirements_nl()
+    {
+        return [
+            'Minimaal 8 karakters',
+            'Minimaal 1 hoofdletter',
+            'Minimaal 1 kleine letter',
+            'Minimaal 1 cijfer',
+            'Minimaal 1 speciaal teken (!@#$%^&* etc.)'
+        ];
+    }
+}