Gravity Forms additions

GravityForms-FieldValidation.php

<?php

  // This file would be inside functions.php or a custom filter plugin that get's imported into functions.php
  
  // Added custom validation for minimum character count of a textfield
  // 4 refers to the form id
  // 6 refers to the field id in that form
  // 10 refers to priority the filter has (WP related)
  // 4 again is an additional parameter for gform, in this case, the id of the form the target field belongs to
  add_filter("gform_field_validation_4_6", "validate_input_length", 10, 4);

  function validate_input_length($result, $value, $form, $field){
      $minimum_character_count = 4;
      if (strlen($value) < $minimum_character_count) :
          $result["is_valid"] = false;
          $result["message"] = "Please enter at least ". $minimum_character_count ." letters.";
      endif;
      return $result;
  }
?>