Auto-Populate Contact Form 7 field with post titles

autopupulate-cf7-posts.php

<?php // Auto-Populate Contact Form

function mrfx_add_plugin_list_to_contact_form ( $tag, $unused ) {  
  
    if ( $tag['name'] != 'add-this-tag-to-CF7-field' )  
        return $tag;  
  
    $args = array ( 'post_type' => 'post-type-slug-goes-here',  
                    'numberposts' => 99,  
                    'orderby' => 'title',  
                    'order' => 'ASC' );  

    $plugins = get_posts($args);  
  
    if ( ! $plugins )  
        return $tag;  
  
    foreach ( $plugins as $plugin ) {  
        $tag['raw_values'][] = $plugin->post_title;  
        $tag['values'][] = $plugin->post_title;  
        $tag['labels'][] = $plugin->post_title;  
    }  
  
    return $tag;  
}  
add_filter( 'wpcf7_form_tag', 'mrfx_add_plugin_list_to_contact_form', 10, 2);  

// Source: https://www.leewillis.co.uk/dynamic-select-list-contact-form-7/
//
// "add-this-tag-to-CF7-field" > Will be the field to be autopopulated
// "post-type-slug-goes-here" > Replace this slug with the post slug
// "'numberposts' => 99" > Number of posts to show in the dropdown
// 'orderby' => 'title', 'order' => 'ASC' > How to order and by which criteria

?>