simensen

<?php
function curl_setopt_custom_postfields($ch, $postfields, $headers = null) {
    $algos = hash_algos();
    $hashAlgo = null;
    foreach ( array('sha1', 'md5') as $preferred ) {
        if ( in_array($preferred, $algos) ) {
            $hashAlgo = $preferred;
            break;
        }
    }