A PHP function that returns the token you need to post something to Bluesky

getBlueskyToken.php

<?php

/*
Use this function whenever you need a token from Bluesky e.g.
$my_token = getBlueskyToken();
*/

function getBlueskyToken() {

    $url = "https://bsky.social/xrpc/com.atproto.server.createSession";

    $payload = array(
        "identifier" => 'YOUR-BLUESKY-HANDLE',
        "password" => 'YOUR-APP-PASSWORD',
    );
    // Generate an app password at https://bsky.app/settings/app-passwords

    $headers = array(
        "Content-Type: application/json"
    );

    $options = array(
        CURLOPT_URL => $url,
        CURLOPT_USERAGENT => "adactio.com",
        CURLOPT_RETURNTRANSFER => TRUE,
        CURLOPT_POST => TRUE,
        CURLOPT_HTTPHEADER => $headers,
        CURLOPT_POSTFIELDS => json_encode($payload),
        CURLOPT_TIMEOUT => 5
    );

    $curl = curl_init();
    curl_setopt_array($curl, $options);
    $response = curl_exec($curl);
    curl_close($curl);

    $data = json_decode($response, true);

    return $data['accessJwt'];

}