Pre-populate Gravity Forms Dropdown

prepopulate-gf-radio.php

<?php
add_filter( 'gform_pre_render_2', 'populate_posts' );
add_filter( 'gform_pre_validation_2', 'populate_posts' );
add_filter( 'gform_pre_submission_filter_2', 'populate_posts' );
add_filter( 'gform_admin_pre_render_2', 'populate_posts' );
function populate_posts( $form ) {

    foreach ( $form['fields'] as &$field ) {

        if ( strpos( $field->cssClass, 'populate-posts' ) === false ) {
            continue;
        }

        // you can add additional parameters here to alter the posts that are retrieved
        // more info: [http://codex.wordpress.org/Template_Tags/get_posts](http://codex.wordpress.org/Template_Tags/get_posts)
        $posts = get_posts( 'post_type=team&numberposts=-1&post_status=publish' );

        $choices = array();

        foreach ( $posts as $post ) {

          $team = get_post_meta( $post->ID, 'team_members' );

          $leader = get_post_meta( $post->ID, 'display_name' );

          $leaders = "<pre>".implode(",\n",$leader)."</pre>";

          $separator = "<pre>".implode(",\n",$team)."</pre>";

            $choices[] = array( 'text' => $post->post_title . '<section>' . $leaders . $separator . '</section>', 'value' => $post->post_title, 'imageChoices_image' => get_the_post_thumbnail_url($post->ID, 'medium') );
        }

        // update 'Select a Post' to whatever you'd like the instructive option to be
        $field->placeholder = 'Select a Post';
        $field->choices = $choices;

    }

    return $form;
}