How Can I Successfully Send JSON POST Requests with Guzzle (Versions 5, 6, & 7)?

Crafting a JSON POST Request with Guzzle

Problem:

Many developers seeking to transmit JSON data via HTTP POST requests using Guzzle have encountered difficulties. Despite replicating the request accurately in tools like Postman, they continue to receive internal server errors.

Solution:

To successfully send a POST request in JSON using Guzzle versions 5, 6, and 7, utilize the following code:

use GuzzleHttp\Client;

$client = new Client();

$response = $client->post('url', [
    GuzzleHttp\RequestOptions::JSON => ['foo' => 'bar'] // or 'json' => [...]
]);

Reference:

For detailed documentation, please visit Guzzle's official documentation.

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