Dynamically add file attachments to Contact Form 7 emails from a custom field

contact-form-7-dynamic-attachment.php

<?php
/* Dynamically add file attachments to Contact Form 7 emails from a Wordpress custom field.
 * Custom field is 'case-pdf' in the example.
 */

add_action('wpcf7_before_send_mail', 'wpcf7_add_attachment');

function wpcf7_add_attachment($contact_form) {
  global $_POST;
  $submission = WPCF7_Submission::get_instance();

  if ( $submission && !empty($_POST['case-pdf']) ) {
    $mail = $contact_form->prop('mail');
    $mail['attachments'] .= $_POST['case-pdf'];
    $contact_form->set_properties(array('mail' => $mail));
  }
}

Hello,

What's custom fiels do you use ? i tried with this input :

[dynamichidden PDF id:PDF "uploads/pdf/Full_lighting_price_list.pdf"]

Not working :-(

Tried this code too :

function send_pdf( $wpcf7 ) {
    $id = $wpcf7->id();
	if ($id==215){
		$uploads = wp_upload_dir();
		define ('MY_FILE_PATH',$uploads['path'].'/pdf/');
		$copy_to_send=MY_FILE_PATH.'Full_lighting_price_list.pdf';	

		$mail = $wpcf7->prop('mail');
		$mail['attachments'] = $copy_to_send;
		
 $wpcf7->set_properties(array(
	    "mail" => $mail
));
	}
}
add_action('wpcf7_before_send_mail','send_pdf', 100);

Can you help me please ?

thank you bro!!!!!!!!!!!!!!!! dam god. nothing worked. only your code!!!!!!

It does not really work for me. What about path? Where should path to file be assigned, and what is default?

Oof, this was a tricky one. I expected that WPCF7 would allow dynamic fields as mail tags in the attachments field out-of-the-box, but I had to jump through some hoops to make it work. If anyone has any feedback on how to do this more efficiently, I'd gladly hear so. Hope this helps :-)

The form contains a hidden field called whitepaper, as defined in WPCF7.

[hidden whitepaper default:shortcode_attr]

This is then rendered to a shortcode to populate the field with the value, in your template

// components/some-form-block.php
<?php
echo do_shortcode("[contact-form-7 id=123 whitepaper=uploads/2018/09/some-file-name.pdf]")
?>

To make sure the field actually gets populated, you'll need a snippet in your functions.php as well

// functions.php
add_filter('shortcode_atts_wpcf7', 'custom_shortcode_atts_wpcf7_filter', 10, 3);
function custom_shortcode_atts_wpcf7_filter($out, $pairs, $atts)
{
    $shortcodes = ['another-hidden-field', 'whitepaper'];

    foreach ($shortcodes as $shortcode) {
        if (isset($atts[$shortcode])) {
            $out[$shortcode] = $atts[$shortcode];
        }
    }

    return $out;
}

Finally, to add the attachment to the mail, another piece of code is needed in functions.php

// functions.php

/**
 * Custom piece of code to add a 'whitepaper' shortcode value
 * into the attachments of WPCF7. Using a [whitepaper] tag in 
 * the WPCF7 mail field does not work as expected. Perhaps because
 * 'whitepaper' is a hidden field and needs to be provided through shortcodes, like:
 * [contact-form-7 id=123 whitepaper=uploads/2021/12/path-to-file.pdf]
 */
add_action('wpcf7_before_send_mail', 'wpcf7_add_attachment');
function wpcf7_add_attachment($contact_form)
{
    global $_POST;
    $submission = WPCF7_Submission::get_instance();

    if ($submission && !empty($_POST['whitepaper'])) {

        $mail = $contact_form->prop('mail');
        $mail['attachments'] .= "\n{$_POST['whitepaper']}"; // Note the newline character here
        $contact_form->set_properties(array('mail' => $mail));
    }
}

For me it only worked this way:

    add_filter( 'wpcf7_mail_components', 'mycustom_wpcf7_mail_components' );

    function mycustom_wpcf7_mail_components( $components ) {

        $coupon_field = get_field('coupon_img', 'options');
        $relative_path = (_wp_get_attachment_relative_path($coupon_field['url']));
        $output = ABSPATH . 'wp-content/uploads/' . $relative_path . '/' . $coupon_field['filename'];

        $components['attachments'][] = $output;

        return $components;
    }

It does not really work for me. What about path? Where should path to file be assigned, and what is default?

BRO: I used this for my Path

if($cf7->id == 3990) {
	$mail = $cf7->prop('mail');
	$mail['attachments'] = './wp-content/themes/autocardivi/sample.pdf';
    $cf7->set_properties(array( "mail" => $mail));
}

add_action("wpcf7_before_send_mail", "Pdfdownload_test_func");

Hello,

What's custom fiels do you use ? i tried with this input :

[dynamichidden PDF id:PDF "uploads/pdf/Full_lighting_price_list.pdf"]

Not working :-(

Tried this code too :

function send_pdf( $wpcf7 ) {
    $id = $wpcf7->id();
	if ($id==215){
		$uploads = wp_upload_dir();
		define ('MY_FILE_PATH',$uploads['path'].'/pdf/');
		$copy_to_send=MY_FILE_PATH.'Full_lighting_price_list.pdf';	

		$mail = $wpcf7->prop('mail');
		$mail['attachments'] = $copy_to_send;
		
 $wpcf7->set_properties(array(
	    "mail" => $mail
));
	}
}
add_action('wpcf7_before_send_mail','send_pdf', 100);

Can you help me please ?

BRO: you're a legend, more blessings to you and you're family :D could you explain in details what those "$mail = $wpcf7->prop('mail');" & "$wpcf7->set_properties(array( "mail" => $mail ));" does, where you got this method, my feature worked, this is all I need, you're awesome <3

Oof, this was a tricky one. I expected that WPCF7 would allow dynamic fields as mail tags in the attachments field out-of-the-box, but I had to jump through some hoops to make it work. If anyone has any feedback on how to do this more efficiently, I'd gladly hear so. Hope this helps :-)

The form contains a hidden field called whitepaper, as defined in WPCF7.

[hidden whitepaper default:shortcode_attr]

This is then rendered to a shortcode to populate the field with the value, in your template

// components/some-form-block.php
<?php
echo do_shortcode("[contact-form-7 id=123 whitepaper=uploads/2018/09/some-file-name.pdf]")
?>

To make sure the field actually gets populated, you'll need a snippet in your functions.php as well

// functions.php
add_filter('shortcode_atts_wpcf7', 'custom_shortcode_atts_wpcf7_filter', 10, 3);
function custom_shortcode_atts_wpcf7_filter($out, $pairs, $atts)
{
    $shortcodes = ['another-hidden-field', 'whitepaper'];

    foreach ($shortcodes as $shortcode) {
        if (isset($atts[$shortcode])) {
            $out[$shortcode] = $atts[$shortcode];
        }
    }

    return $out;
}

Finally, to add the attachment to the mail, another piece of code is needed in functions.php

// functions.php

/**
 * Custom piece of code to add a 'whitepaper' shortcode value
 * into the attachments of WPCF7. Using a [whitepaper] tag in 
 * the WPCF7 mail field does not work as expected. Perhaps because
 * 'whitepaper' is a hidden field and needs to be provided through shortcodes, like:
 * [contact-form-7 id=123 whitepaper=uploads/2021/12/path-to-file.pdf]
 */
add_action('wpcf7_before_send_mail', 'wpcf7_add_attachment');
function wpcf7_add_attachment($contact_form)
{
    global $_POST;
    $submission = WPCF7_Submission::get_instance();

    if ($submission && !empty($_POST['whitepaper'])) {

        $mail = $contact_form->prop('mail');
        $mail['attachments'] .= "\n{$_POST['whitepaper']}"; // Note the newline character here
        $contact_form->set_properties(array('mail' => $mail));
    }
}

I've been ending on the exact same solution :-)
I should have found this post earlier !