1无法转换为JSONArray"

这是我的PHP脚本

1 cannot be converted to JSONArray"

here is my php script

<?php

mysql_connect("localhost","tadmin","t2012");
mysql_select_db("tdb");

sql = mysql_query( " .

sql=mysql_query("SELECT uid,uname FROM tuser WHERE uname ='".

_REQUEST [' uname']." 'AND password ='".

_REQUEST['uname']."' AND password ='".