Contact form 7 dynamic value populations

cf-dynamic-values.php

<?php 

// contact form 7 dynamic value populations
// usage [select field-name values:post-list] (checkbox, radio works as well)
// for adding custom Form-Tag Check https://contactform7.com/2015/01/10/adding-a-custom-form-tag/

function cf7DynamicListExample($tag)
{
    $options = $tag['options'];

    if (!isset($options))
        return $tag;

    foreach ($options as $option)
        if (preg_match('%^values:([-0-9a-zA-Z_]+)$%', $option, $matches))
            $arg = $matches[1];

    if (!isset($arg))
        return $tag;

    switch ($arg) {
        case 'post-list':
            continue;
            break;

        default:
            return $tag;
            break;
    }

    $args = [
        'post_type' => 'post',
        'numberposts' => -1,
        'orderby' => 'title',
        'order' => 'ASC'
    ];

    $posts = get_posts($args);

    if (!$posts)
        return $tag;

    foreach ($posts as $post) {
        $tag['raw_values'][] = $post->post_title;
        $tag['values'][] = $post->post_title;
        $tag['labels'][] = $post->post_title;
    }

    return $tag;
}

add_filter('wpcf7_form_tag', 'cf7DynamicListExample', 10, 2);

How can i show id slug value in input type id='value' (how to pass value in id)

You can set the id for an input through the admin, but if you want to do it through code you can use the same hook - find the tag you're looking for and add:

$tag['options'][] = 'id:my-desired-id';

This will add an id "my-desired-id" to the input.