BitFlyer APIを使用し建玉情報を取得します。

getTatedama.php

<?php
    $fqdn = 'https://api.bitflyer.jp';
    $path = '/v1/me/getpositions/?product_code=FX_BTC_JPY';
    $url = $fqdn.$path;
    $timeStamp = time();

    $accessKey = 'アクセスキー';
    $accessSecret = 'アクセスシークレット';

    $message = $timeStamp."GET".$path.NULL;

    $sign = hash_hmac("sha256", $message, $accessSecret);

    $cl = curl_init();

    $header = array(
            "ACCESS-KEY:$accessKey\r\n".
            "ACCESS-TIMESTAMP:$timeStamp\r\n".
            "ACCESS-SIGN:$sign\r\n".
            "Content-Type:application/json"
            );

    curl_setopt($cl, CURLOPT_HTTPHEADER, $header);
    curl_setopt($cl, CURLOPT_URL, $url);
    curl_setopt($cl, CURLOPT_RETURNTRANSFER, true );

    $result =  curl_exec($cl);
    $array =  json_decode($result, JSON_PRETTY_PRINT);
?>