Contact Form 7 to Sendy.co Newsletter Instance

multiple-lists.php

<?php 

// Feel free to save your $list_id and $api_key where you want.

/**
 * Send Contact Form 7 to Newsletter
 *
 * @param $form object WPCF7_ContactForm
 * @param $abort boolean
 * @param $submission object WPCF7_Submission
 */
function subscribe_to_newsletter( $form, &$abort, $submission ) {


	/**
	 * @var string $instance
	 * Your Sendy Instance URL
	 */
	$instance = 'https://your-sendy-instance.com';

	/**
	 * @var string $api_key
	 * Your Sendy API key
	 */
	$api_key = 'xxx';

	/**
	 * @var array $newsletter_form_ids
	 * contains the form id's from contact form 7
	 */
	$newsletter_form_ids = [
		5, // Form Footer
		6, // Form Sidebar
	];

	if ( in_array( $form->id, $newsletter_form_ids ) ) {

		/**
		 * @var string $list_id
		 * The id of your Sendy list
		 *
		 */
		$list_id = null;

		/** Check which Form where using and apply the right List ID */
		switch ($form->id) {
			case '5' :
				$list_id = 'xxx';
				break;
			case '6' :
				$list_id = 'zzz';
				break;
		}

		/**
		 * @var array $posted_data
		 * the fields that have been submitted
		 */
		$posted_data = $submission->get_posted_data();

		/**
		 * @var \http\QueryString $postdata
		 * build the body we want to send to sendy
		 */
		$postdata = http_build_query(
			[
				'email'   => $posted_data['your-email'],
				'name'    => $posted_data['your-name'],
				'list'    => $list_id,
				'api_key' => $api_key,
				'boolean' => "true",
			]
		);

		/**
		 * @var array $opts
		 * Arguments for wp_remote_post
		 */
		$opts = [
			'method' => 'POST',
			'header' => 'Content-type: application/x-www-form-urlencoded',
			'body'   => $postdata,
		];

		/**
		 * Post the Request to Sendy
		 */
		$request = wp_remote_post( $instance . '/subscribe', $opts );

		/**
		 * Get the Response
		 */
		$response = wp_remote_retrieve_response_message( $request );

		/**
		 * Check if the Responds returns a success message
		 * if not throw a error and abort the submission
		 */
		if ( $response !== 'OK' ) {
			$abort = true;
			$submission->set_response( $response );
		}

	}

}

add_action( 'wpcf7_before_send_mail', 'subscribe_to_newsletter', 10, 3 );
		 * @var \http\QueryString $postdata
		 * build the body we want to send to sendy
		 */
		$postdata = http_build_query(
			[
				'email'   => $posted_data['your-email'],
				'name'    => $posted_data['your-name'],
				'list'    => $list_id,
				'api_key' => $api_key,
				'boolean' => "true",
			]
		);

		/** 
		 * @var array $opts
		 * Arguments for wp_remote_post
		 */
		$opts = [
			'method' => 'POST',
			'header' => 'Content-type: application/x-www-form-urlencoded',
			'body'   => $postdata,
		];

		/**
		 * Post the Request to Sendy
		 */
		$request = wp_remote_post( $instance . '/subscribe', $opts );

		/**
		 * Get the Response
		 */
		$response = wp_remote_retrieve_response_message( $request );

		/**
		 * Check if the Responds returns a success message
		 * if not throw a error and abort the submission
		 */
		if ( $response !== 'OK' ) {
			$abort = true;
			$submission->set_response( $response );
		}

	}

}

add_action( 'wpcf7_before_send_mail', 'subscribe_to_newsletter', 10, 3 );

single-list.php

<?php 

// Feel free to save your $list_id and $api_key where you want.

/**
 * Send Contact Form 7 to Newsletter
 *
 * @param $form object WPCF7_ContactForm
 * @param $abort boolean
 * @param $submission object WPCF7_Submission
 */
function subscribe_to_newsletter( $form, &$abort, $submission ) {

	/**
	 * @var array $newsletter_form_ids
	 * contains the form id's from contact form 7
	 */
	$newsletter_form_ids = [ 5 ];

	if ( in_array( $form->id, $newsletter_form_ids ) ) {

		/** 
		 * @var string $instance
		 * Your Sendy Instance URL 
		 */
		$instance = 'https://your-sendy-instance.com';
		
		/** 
		 * @var string $list_id 
		 * The id of your Sendy list
		 * 
		 */
		$list_id = 'xxx';
		
		/**
		 * @var string $api_key 
		 * Your Sendy API key
		 */
		$api_key = 'xxx';


		/** 
		 * @var array $posted_data
		 * the fields that have been submitted 
		 */
		$posted_data = $submission->get_posted_data();

		/**
		 * @var \http\QueryString $postdata
		 * build the body we want to send to sendy
		 */
		$postdata = http_build_query(
			[
				'email'   => $posted_data['your-email'],
				'name'    => $posted_data['your-name'],
				'list'    => $list_id,
				'api_key' => $api_key,
				'boolean' => "true",
			]
		);

		/** 
		 * @var array $opts
		 * Arguments for wp_remote_post
		 */
		$opts = [
			'method' => 'POST',
			'header' => 'Content-type: application/x-www-form-urlencoded',
			'body'   => $postdata,
		];

		/**
		 * Post the Request to Sendy
		 */
		$request = wp_remote_post( $instance . '/subscribe', $opts );

		/**
		 * Get the Response
		 */
		$response = wp_remote_retrieve_response_message( $request );

		/**
		 * Check if the Responds returns a success message
		 * if not throw a error and abort the submission
		 */
		if ( $response !== 'OK' ) {
			$abort = true;
			$submission->set_response( $response );
		}

	}

}

add_action( 'wpcf7_before_send_mail', 'subscribe_to_newsletter', 10, 3 );