> For the complete documentation index, see [llms.txt](https://docs.stylemixthemes.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.stylemixthemes.com/masterstudy-lms/developers-guide/masterstudy-lms-hooks/certificate-builer.md).

# Certificate Builer

The [**Certificate Builder**](/masterstudy-lms/lms-pro-addons/certificate-builder.md) addon provides filters that let you customize the fields displayed on certificates and control the data used in certificate rendering. Use these hooks to add, modify, or remove certificate field values.

## Filters

1. `stm_certificates_fields`

**Type:** filter\
**What it does:** lets you modify the default fields shown when editing the certificate preview\
**Parameters:**

* `$fields` (array) list of field definitions

**Return:** array of updated fields

**Example:**

```php
add_filter( 'stm_certificates_fields', 'stm_certificates_fields_function' );

function stm_certificates_fields_function( $fields ) {
$user_id = get_current_user_id();
if ( $user_id == 33 ) {
    $fields['course_name'] = array(
       'name'  => 'Course name',
       'value' => '-Course name-',
    );
}

return $fields;
}
```

2. `masterstudy_lms_certificate_fields_data`

**Type:** filter\
**What it does:** allows customization of the internal values of the certificate\
**Parameters:**

* `$fields` (array) list of certificate data values
* `$certificate` (array) current certificate data

**Return:** array of updated certificate data

**Example:**

```php
add_filter( 'masterstudy_lms_certificate_fields_data', 'masterstudy_lms_certificate_fields_data_function', 10, 2 );

function masterstudy_lms_certificate_fields_data_function( $fields, $certificate ) {
	$user_id = get_current_user_id();
	if ( $user_id == 1 ) {
		$fields[] = array( 'content' => 'Custom course name' );
	}
	return $fields;
}
```


---

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