Auto-populate Fields

Here’s a generic example. Add this to your theme’s functions.php or create an mu-plugin.

/**
 * Insert name and email of currently logged-in user into testimonial submission form.
 * For Strong Testimonials plugin.
 *
 * @param $value
 * @param $field
 * @param $form_values
 *
 * @return mixed
 */
function my_strong_field_value( $value, $field, $form_values ) {
	// Don't overwrite existing entry. Only possible if a default value is set
	// on the form field or JavaScript and HTML validation is disabled.
	if ( ! $value ) {

		// Get current user
		$current_user = wp_get_current_user();

		// 'client_name' and 'email' are the default field names.
		// Change these if yours are different.
		if ( 'client_name' == $field['name'] ) {
			$value = $current_user->data->display_name;
		} elseif( 'email' == $field['name'] ) {
			$value = $current_user->data->user_email;
		}

	}

	return $value;
}
add_filter( 'wpmtst_field_value', 'my_strong_field_value', 10, 3 );