Product Enquiry form using WooCommerce and Contact Form 7: https://www.damiencarbery.com/2017/02/product-enquiry-form-using-woocommerce-and-contact-form-7/

add-cf7-after-short-description-by-action.php

<?php
/*
Plugin Name: CF7 form to all products (after short description, with add_action)
Plugin URI: http://www.damiencarbery.com
Description: Append a Contact Form 7 form to the Short Description section of all Woocommerce products.
Author: Damien Carbery
Version: 0.1
WC tested up to: 5.3.0
*/


// Add the CF7 form between the short description and the 'Add to cart' button.
add_action( 'woocommerce_single_product_summary', 'dcwd_add_cf7_form_after_single_excerpt', 25 );
function  dcwd_add_cf7_form_after_single_excerpt() {
  echo do_shortcode('[contact-form-7 id="73" title="Contact form 1"]'); ;
}

add-cf7-after-short-description-by-filter.php

<?php
/*
Plugin Name: CF7 form to all products (after short description, with add_filter)
Plugin URI: http://www.damiencarbery.com
Description: Append a Contact Form 7 form to the Short Description section of all Woocommerce products.
Author: Damien Carbery
Version: 0.1
WC tested up to: 5.3.0
*/


// Add the CF7 form between the short description and the 'Add to cart' button.
add_filter('woocommerce_short_description', 'dcwd_append_cf7_form_to_short_description');
function  dcwd_append_cf7_form_to_short_description( $short_description ) {
  return $short_description . do_shortcode('[contact-form-7 id="73" title="Contact form 1"]');
}

add-cf7-popup-to-product-page.php

<?php
/*
Plugin Name: CF7 to product page
Plugin URI:  https://www.damiencarbery.com/2018/06/customise-choose-an-option-dropdown-item/
Description: Add a Contact Form 7 form to the product page.
Author: Damien Carbery
Version: 0.1
WC tested up to: 5.3.0
*/

add_action( 'woocommerce_after_add_to_cart_button', 'dcwd_add_cf7_form_under_add_to_cart' );
function dcwd_add_cf7_form_under_add_to_cart() {
	// Add the hidden contact form. It will be displayed when the button is clicked.
	echo '<div id="askinfo" style="display:none">' . do_shortcode( '[contact-form-7 id="73" title="Contact form 1"]' ) . '</div>';
	// Button to open the popup.
	echo '<button><a href="#TB_inline?height=600&width=400&inlineId=askinfo" class="thickbox">Ask for Info</a></button>';
	// Add the thickbox JS and CSS for the popup.
	add_thickbox();
}

cf7-get-post-info-for-report.html

[dynamichidden page-url "CF7_URL"]
[dynamichidden site-url "CF7_bloginfo show='url'"]
[dynamichidden post-id "CF7_get_post_var key='ID'"]

cf7-retrieve-product-sku.txt

<p>SKU<br />
[dynamictext product-sku "CF7_get_custom_field key='_sku'"]</p>

In the email:
SKU: [product-sku]

cf7-to-product-page-specified-categories.php

<?php
/*
Plugin Name: CF7 to product page (specified categories)
Plugin URI:  https://www.damiencarbery.com/2018/06/customise-choose-an-option-dropdown-item/
Description: Add a Contact Form 7 form to the product page of products in specified categories only.
Author: Damien Carbery
Version: 0.1
WC tested up to: 5.3.0
*/

add_action( 'woocommerce_after_add_to_cart_button', 'dcwd_add_cf7_form_under_add_to_cart' );
function dcwd_add_cf7_form_under_add_to_cart() {
	// Add the contact form for products in the tshirts category.
	if ( has_term( array('tshirts', 'accessories' ), 'product_cat' ) ) {
		echo do_shortcode( '[contact-form-7 id="73" title="Contact form 1"]' );
	}
	
}

cf7-use-post-info-for-report.txt

Page URL: [page-url]
Edit URL: [site-url]/wp-admin/post.php?post=[post-id]&action=edit

cf7_form_shortcode.html

[contact-form-7 id="27" title="Product Enquiry"]

cf7_hidden_field.html

[dynamichidden product-name "CF7_get_post_var key='title'"]

cf7_visible_field.html

<label>Product Name
[dynamictext product-name "CF7_get_post_var key='title'"]</label>

wc-cf7-form-to-all-products.php

<?php
/*
Plugin Name: CF7 form to All Products
Plugin URI: http://www.damiencarbery.com
Description: Append a Contact Form 7 form to the Product Description section of all Woocommerce products.
Author: Damien Carbery
Version: 0.2
WC tested up to: 7.0.1
*/

add_filter('the_content', 'dc_cf7_form_to_all_products');
function dc_cf7_form_to_all_products($content) {
    if ( class_exists( 'woocommerce' ) && is_product() && is_main_query() ) {  // Check suggested by: https://pippinsplugins.com/playing-nice-with-the-content-filter/
        return $content . '[contact-form-7 id="8018" title="Product Enquiry"]';
    }
    
    return $content;
}


// Ensure the Description tab is present as it is needed by the_content filter.
add_filter( 'woocommerce_product_tabs', 'dc_cf7_add_description_tab', 20 );
function dc_cf7_add_description_tab( $tabs ) {
    global $product, $post;

    // Description tab - add if there is no post content (i.e. if the Description is empty)
    // because woocommerce_default_product_tabs() in woocommerce/includes/wc-template-functions.php
    // excludes it if the post content is empty.
    if ( ! $post->post_content ) {
        $tabs['description'] = array(
            'title'    => __( 'Description', 'woocommerce' ),
            'priority' => 10,
            'callback' => 'woocommerce_product_description_tab',
		);
	}
    
    return $tabs;
 }

wc-cf7-form-to-in-stock-products.php

<?php
add_filter('the_content', 'dc_cf7_form_to_all_products');
function dc_cf7_form_to_all_products($content) {
    if ( class_exists( 'woocommerce' ) && is_product() && is_main_query() ) {  // Check suggested by: https://pippinsplugins.com/playing-nice-with-the-content-filter/
        global $post;
        $product = wc_get_product($post);
        // Only display the form when the product is in stock.
        if ( $product->is_in_stock() ) {
            return $content . '[contact-form-7 id="27" title="Product Enquiry"]';
        }
    }
    
    return $content;
}

wc-cf7-form-to-short-description.php

<?php
/*
Plugin Name: CF7 form to All Products
Plugin URI: http://www.damiencarbery.com
Description: Append a Contact Form 7 form to the Short Description section of all Woocommerce products.
Author: Damien Carbery
Version: 0.1
WC tested up to: 5.3.0
*/

add_filter('woocommerce_short_description', 'dc_cf7_form_to_all_products');
function dc_cf7_form_to_all_products($content) {
    if ( class_exists( 'woocommerce' ) && is_product() && is_main_query() ) {  // Check suggested by: https://pippinsplugins.com/playing-nice-with-the-content-filter/
        return $content . '[contact-form-7 id="27" title="Product Enquiry"]';
    }
    
    return $content;
}

woocommerce_check_fatal_error.txt

[03-Feb-2017 20:53:18 UTC] PHP Fatal error:  Call to undefined function is_product() in /wp-content/plugins/wc-cf7-form-to-all-products.php on line 14

Hello, I want show form in specific category product, but i don´t know how do it ...

I know I have to modify the following if, but I do not know how to filter by category:

if ( $product->is_in_stock() ) {

Can you help me?

add_action( 'woocommerce_after_shop_loop', 'dc_cf7_form_to_category_archive', 40 );
function dc_cf7_form_to_category_archive() {
	if ( is_product_category( array( 'category_1', 'category_2' ) ) ) {
		echo do_shortcode( '[contact-form-7 id="65" title="Contact form 1"]' );
	}
}

To apply to all categories you can remove the is_product_category() check.
The 'woocommerce_after_shop_loop' is only on category pages so the function doesn't need to check whether it is in a product category page.

Hey there,

Thanks so much for this, it's very helpful.
I have one question:

How can I show form in specific category in the short description?

Thanks!
Cheers,
KalayaanCrypto.

@KalayaanCrypto, Use the first gist and add something like:
if ( has_term( array('tshirts', 'accessories' ), 'product_cat' ) ) { echo do_shortcode('[contact-form-7 id="73" title="Contact form 1"]'); }

Thanks for this man!

Hi is it possible to hide the form when product is "out of stock'. Thanks in advance

Hi is it possible to hide the form when product is "out of stock'. Thanks in advance

Look at the wc-cf7-form-to-in-stock-products.php snippet - it uses
if ( $product->is_in_stock() ) { }
to see if the product is in stock and only includes the shortcode if it is in stock.

Which snippet are you using?

Hi thanks for response. Im using this snippet to show the form in all products:

add_action( 'woocommerce_single_product_summary', 'dcwd_add_cf7_form_after_single_excerpt', 25 );
function  dcwd_add_cf7_form_after_single_excerpt() {
  echo do_shortcode('[contact-form-7 id="4421" title="Бърза поръчка"]'); ;
}

But when insert the wc-cf7-form-to-in-stock-products.php snippet the form is disappeared. I don't know what is wrong because the snippet is in my function.php file in child theme.

Hi again I saw the problem :) the form is displayed in main description tab but my snippet is for product short description. Where should I edit the code to appear in the short description ? Tnks in advance.

I found the solution ! In my case i'm using "action", the sniper is with 'filter" when im change the code the form is appeared short description,
Thanks for the snippets they were very useful to me !

I found the solution ! In my case i'm using "action", the sniper is with 'filter" when im change the code the form
is appeared short description, Thanks for the snippets they were very useful to me !
I'm glad you got it fixed.
I use the the_content filter in wc-cf7-form-to-all-products-php. It adds a check to verify that the Description tab is available. You can add the
if ( $product->is_in_stock() ) { }
check to that snippet.