gform-fun.php

<?php
add_filter( 'gform_pre_render_1', 'szbl_gform_render_test' );
function szbl_gform_render_test( $form )
{

	foreach ( $form['fields'] as $key => $field )
	{
		if ( 'select' == $field->type )
		{
			if ( 5 == $field->id )
			{
				$newfield = $field;

				$posts = get_posts( 'post_per_page=999' );

				$newfield->choices = array();
				foreach ( $posts as $post )
				{
					$newfield->choices[] = array(
						'text' => $post->post_title,
						'value' => $post->ID,
						'isSelected' => false,
						'price' => 0
					);
				}

				$form['fields'][ $key ] = $newfield;

			}
		}
	}

	return $form;
}


// add_filter( 'gform_pre_render_1', 'szbl_gform_render_post_type' );

function szbl_gform_render_post_type( $form )
{

	foreach ( $form['fields'] as $key => $field )
	{
		if ( 'select' == $field->type )
		{
			if ( 5 == $field->id )
			{
				$newfield = $field;

				$post_types = get_post_types();

				$newfield->choices = array();
				foreach ( $post_types as $post_type )
				{
					$data = get_post_type_object( $post_type );
					$newfield->choices[] = array(
						'text' => $data->labels->name,
						'value' => $post_type
					);
				}

				$form['fields'][ $key ] = $newfield;

			}
		}
	}

	return $form;
}