list-wpcf7-form-shortcodes.php

function list_wpcf7_form_shortcodes() {
    
    global $post;

    if ( ! post_type_exists( 'wpcf7_contact_form' ) )
        _e( "You haven't install/activate Contact Form 7 plugin yet.", "text_domain" );

    $wpcf7_posts = get_posts( array(
                    'post_type' => 'wpcf7_contact_form',
                    'posts_per_page' => -1,
                ) );

    echo "<select name='wpcf7_shortcodes'>";

    foreach ( $wpcf7_posts as $post ) : setup_postdata( $post );
        $wpcf7_shortcode = '[contact-form-7 id="' . get_the_ID() . '" title="' . get_the_title() . '"]';
        echo "<option value='" . $wpcf7_shortcode . "'>" . $wpcf7_shortcode . "</option>";
    endforeach;
    wp_reset_postdata();

    echo "</select>";

}