php USES curl to send data instances in json format

$urlcon= 'http://localhost/******.php';
$data=' {
"button":[
{ 
"type":"click",
"name":" Today's song, ",
"key":"V1001_TODAY_MUSIC"
},
{
"type":"click",
"name":" Introduction of singer ",
"key":"V1001_TODAY_SINGER"
},
{
"name":" The menu ",
"sub_button":[
{
"type":"click",
"name":"hello word",
"key":"V1001_HELLO_WORLD"
},
{
"type":"click",
"name":" praise 1 Next we ",
"key":"V1001_GOOD"
}]
}]
}';
$host = $urlcon;
$ch = curl_init();
$data = 'data='.$data;
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_URL,$host);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
echo $output = curl_exec($ch); 
curl_close($ch);