Prepopulate Radios in Gravity Forms

prepopulate_radio.php

<?php

// Filter is applied to all forms
//add_filter('gform_pre_render', 'wps_populate_person');

// Filter only applied to Form id = 3
add_filter('gform_pre_render_3', 'wps_populate_person');
/**
 * Pre-populates radios based on previous name field
 * Searches post type 'person'
 *
 * @param array @form Current Form Object
 * @return array @form Modified Form Object
 */
function wps_populate_person( $form ){
        foreach( $form['fields'] as &$field ) {
                if ( 'radio' != $field['type'] || false === strpos( $field['cssClass'], 'person' ) || ! rgar( $field, 'allowsPrepopulate' ) )
                        continue;		
                // For Simple Name input
                //$query = new WP_Query( array( 's' => $_POST['input_1'], 'post_type' => array( 'wps_person' ),  'gform_search' => true ) );
		
                // For Normal Name input
                $query = new WP_Query( array( 's' => $_POST['input_1_3'] . '+' . $_POST['input_1_6'] , 'post_type' => array( 'wps_person' ),  'gform_search' => true ) );
		
                $field['choices'] = array();
		
                if ( empty( $query->posts ) ) {
			// Empty field if needed
			$field['choices'] = array( array( 'text' => 'No Persons Found', 'value' => '' ) );
		}
                else {
	                foreach( $query->posts as $post )
        	                $field['choices'][] = array( 'text' => $post->post_title, 'value' => $post->ID );
		}

		// Add Other Choice
		$field['enableOtherChoice'] = 1;

		break;
	}
	
	return $form;
	
}