(PECL OAuth >= 1.0.0)
OAuthProvider::consumerHandler — Set the consumerHandler handler callback
Sets the consumer handler callback, which will later be called with OAuthProvider::callConsumerHandler().
This function is currently not documented; only its argument list is available.
callback_functionThe callable functions name.
No value is returned.
Example #1 Example OAuthProvider::consumerHandler() callback
<?php
function lookupConsumer($provider) {
    if ($provider->consumer_key === 'unknown') {
        return OAUTH_CONSUMER_KEY_UNKNOWN;
    } else if($provider->consumer_key == 'blacklisted' || $provider->consumer_key === 'throttled') {
        return OAUTH_CONSUMER_KEY_REFUSED;
    }
    $provider->consumer_secret = "the_consumers_secret";
    return OAUTH_OK;
}
?>