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I dont want to use a REST API to publish to wordpress.

I want to create a form on a wordpress page which will send a POST to an external REST API. Users will put in their information, and perhaps upload a file. When the press "submit" I want this information to be sent to a REST API on a different server (not wordpress).

Are there any plugins that allow this? Has anyone done this? Of course, I might run into troubles with this: http://en.wikipedia.org/wiki/Same_origin_policy

It looks like I want to do the reverse of this: http://wordpress.org/extend/plugins/json-api/ Instead of making a REST API for wordpress, I want to make wordpress communicate send a POST to an external REST API when a user presses a button on a form.

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I don't know of a plugin that does it in a general way; for the most part, you'll need to build something custom for each specific API you intend to communicate with.

For your purposes, the key function will be wp_remote_post(), which is a wrapper for the POST method of WP's HTTP class. (Use this instead of making manual cURL requests, because WP_Http has all kinds of fallbacks for different modes of HTTP transport.) Here's a nice introduction: http://yoast.com/wp-best-practice/wordpress-http-api/ Same origin policies generally only apply to browsers. wp_remote_post() and its ilk are fired on the server.

Sending data is pretty easy - just put an array into the 'body' of your wp_remote_post() call. The tricky part is always authentication - does the API server expect a pre-registered key, or some sort of oAuth handoff, or what. If it's as simple as a shared key, you can just pass it as part of the 'body' payload.

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    This page has been intentionally deleted. too bad that you didn't write an example so it can keep in time Commented Nov 29, 2019 at 4:12
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    Does anyone could helps on this? I m looking at it too. to modify wpForm submit button post to external API Commented Jun 10, 2020 at 4:12
  • There is documentation on wp_remote_post on WP's website, but I don't think it's enough. It's a start. developer.wordpress.org/reference/functions/wp_remote_post Commented Aug 11, 2021 at 21:02
  • There's also this wordpress.stackexchange question and answers: wordpress.stackexchange.com/questions/49022/… Commented Aug 11, 2021 at 21:07

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