# Contact Form
{% hint style="info" %}
Important: Developers can use these hooks to customize only the default form.
{% endhint %}
### **ccb\_contact\_form\_style\_class**
This hook allows to change classes of the form itself
**Parameters:**
* **$classes(String)**
* **$settings(Array)**
**Example:**
```php
add_filter(ccb_contact_form_style_class, 'add_form_class', 10, 2);
function add_form_class($classes, $settings){
$classes .= ' my_class'; //replace my_class with the name of your class
return $classes;
}
```
### **ccb\_contact\_form\_submit\_class**
This hook allows you to change the classes of the form itself
**Parameters:**
* **$classes(String)**
* **$settings(Array)**
**Example:**
```php
add_filter(ccb_contact_form_submit_class, 'add_submit_button_class', 10, 2);
function add_submit_button_class($classes, $settings){
if ( $settings['calc_id'] == 22 ) {
$classes[] = 'my-custom-class';
}
return $classes;
}
```
### **ccb\_contact\_form\_submit\_action**
This hook allows you to add HTML code to the submit button.
**Parameters**:
* **$settings(Array)**
**Example:**
```php
add_action('ccb_contact_form_submit_action', 'your_function_name');
function your_function_name($settings){
if($settings['calc_id'] == 240){ //change 240 to your calculator ID!
echo 'custom html code';
}
}
```
### **ccb\_contact\_form\_add\_fields**
This hook adds additional fields to the contact form, when adding an additional field you need to add two hooks **ccb\_contact\_form\_add\_requires**, **ccb\_contact\_form\_add\_text\_form\_fields** and **ccb\_contact\_form\_add\_sendform\_fields** as these parts are mandatory when adding new fields, otherwise when submitting the form an empty value will be passed to the back part.
**Parameters**:
* **$settings(Array)**
**Example:**
```php
add_action('ccb_contact_form_add_fields', 'maby_add_fields', 10, 1);
function maby_add_fields() {
echo '
Custom field title*
';
}
```
### **ccb\_contact\_form\_add\_requires**
This is a hook to add values for fields if the field is mandatory
**Parameters:**
* **$settings(Array)**
**Example:**
```php
add_filter('ccb_contact_form_add_requires', 'add_sendform_requires', 10, 1);
function add_sendform_requires($requires){
$newRequires = array(
'required' => true
);
array_push($requires, $newRequires);
return $requires;
}
```
### **ccb\_contact\_form\_add\_text\_form\_fields**
This is a hook to add text values that are warnings in case the user has not filled in the required fields.
**Parameters:**
* **$settings(Array)**
**Example:**
```php
add_filter('ccb_contact_form_add_text_form_fields', 'add_sendform_required_text_fields', 10, 1);
function add_sendform_required_text_fields($textMessages){
$textMessages['new_message'] = 'New message is required to be filled.';
return $textMessages;
}
```
### **ccb\_contact\_form\_submit\_label**
This is a hook that allows you to change the text of the submit button individually and globally.
**Example:**
```php
function change_submitbtn_label($button_text, $calc_id){
if($calc_id == 252){
$button_text = 'Submit Form';
}
return $button_text;
}
```
### **ccb\_contact\_form\_add\_sendform\_fields**
This is the structure of all fields before submitting to the back end, and is a required part before submitting.
**Parameters:**
* **$settings(Array)**
**Example:**
```php
add_filter('ccb_contact_form_add_sendform_fields', 'add_sendform_fields_to_front', 10, 1);
function add_sendform_fields_to_front($sendformFields){
$newFields = array('name'=> 'new_message', 'required' => true, 'value' => '');
array_push($sendformFields, $newFields);
return $sendformFields;
}
```
### **ccb\_contact\_form\_invalid\_error**
This hook allows you to change the error text when submitting a form
**Parameters:**
* **$text(String)**
**Example:**
```php
add_filter('ccb_contact_form_invalid_error', 'change_form_error_message');
function change_form_error_message(){
return 'Custom error message';
}
```
### **ccb\_contact\_form\_general\_add\_email\_fields**
Add additional fields to receive email notifications in the main calculator settings.
**Example:**
```php
add_action('ccb_contact_form_general_add_email_fields', 'add_receiver_email_fields');
function add_receiver_email_fields(){
echo '
Custom email
';
}
```
### **ccb\_contact\_form\_settings\_add\_email\_fields**
This hook allows you to add recipients through individual calculator settings.
**Example:**
```php
add_action('ccb_contact_form_settings_add_email_fields', 'add_form_receiver_email_fields');
function add_form_receiver_email_fields(){
echo '
Custom email
';
}
```
### **ccb\_email\_subject**
This is a hook to change the subject of an email when sending a calculator form.
**Parameters:**
* **$subject(String)**
* **$calc\_id(Integer)**
**Example:**
```php
add_filter('cbb_email_subject', 'change_email_subject', 10, 2);
function change_email_subject($subject, $calc_id){
if($calc_id == 257){
return 'changed_subject_demo_257';
}
}
```