The Etherpad Lite API is not yet finalized, so expect things to change! This client will be updated with the current API Draft as shown in the Etherpad Lite Wiki.
PHP with support for cURL.
The only thing you need to get started is the API key, it can be found in the root folder of your Etherpad Lite deployment (the file is named APIKEY.txt).
$eplite = new EtherpadLiteClient;
$eplite->setParams("yourapikeyhere", "http://epliteexample.com/api", 1);
$reply = $eplite->createPad("padname", "In ur pad, writing ur txts");
print $eplite->getText("padname");