Expanding abbreviations doesn't improve clarity.
E.g. XMLHttpRequest vs ExtensibleMarkupLanguageHypertextTransferProtocolRequest
and ftp_ssl_connect vs FileTransferProtocol_SecureSocketLayer_Connect
or if you want to get really ridiculous:
MysqlndUhConnection::sslSet becomes MyStructuredQueryLanguageNativeDriverUserHandlerConnection::SecureSocketLayerSet