cafe_update_field()

Purpose

Saves a field value. The value is validated and sanitized by the field type first.

cafe_update_field( string $selector, mixed $value, mixed $object_id = null, ?string $object_type = null ): bool

Parameter	Type	Default	Description
`$selector`	string	-	Field name or field key.
`$value`	mixed	-	New value. An empty value (`''`, `null`, `[]`) removes the saved value.
`$object_id`	mixed	`null`	Which object. `null` means the current object.
`$object_type`	string\|null	`null`	Object type, or `null` to infer it.

true on success, false on failure (unknown field, unknown object, or invalid value).

cafe_update_field(
	'hero_title',
	'Welcome',
	$post_id
);

Need to know why a save failed? Use the service, which returns a WP_Error:

$result = cafe()->fields()->update( 'hero_title', $title, $post_id );

if ( is_wp_error( $result ) ) {
	error_log( $result->get_error_message() );
}

No permission check. Like update_post_meta(), this is a developer function. Check current_user_can() yourself before saving user input.
The field's Required setting is not enforced here (so code can clear values). Pass true as the fifth argument of cafe()->fields()->update() to enforce it.
Fires cafe_before_save_field and cafe_after_save_field.
The object must exist: saving for post 999999 that does not exist fails.