sig签名构造方法

build_http_query.php

function build_http_query($params) {
    if (!$params) return '';

    // Urlencode both keys and values
    $keys = array_keys($params);
    $values = array_values($params);
    //$keys = OAuthUtil::urlencode_rfc3986(array_keys($params));
    //$values = OAuthUtil::urlencode_rfc3986(array_values($params));
    $params = array_combine($keys, $values);

    // Parameters are sorted by name, using lexicographical byte value ordering.
    // Ref: Spec: 9.1.1 (1)
    uksort($params, 'strcmp');

    $pairs = array();
    foreach ($params as $parameter => $value) {
        if (is_array($value)) {
            // If two or more parameters share the same name, they are sorted by their value
            // Ref: Spec: 9.1.1 (1)
            natsort($value);
            foreach ($value as $duplicate_value) {
                $pairs[] = $parameter . '=' . $duplicate_value;
            }
        } else {
            $pairs[] = $parameter . '=' . $value;
        }
    }
    // For each parameter, the name is separated from the corresponding value by an '=' character (ASCII code 61)
    // Each name-value pair is separated by an '&' character (ASCII code 38)
    return implode('&', $pairs);
}