How to use JSON in Yii - php

Question

I want to send/get a variable to/from controller action. My codes:
view file
....
<button id="radiyo">radio</button>
<script>
$("#radiyo").on("click", function(){
var $radio = $('input[type=radio][name=siniflerin-siyahisi]:checked').attr('id');
$.ajax({
type: 'POST',
url: '<?=Yii::app()->baseUrl;?>/ideyalar/sech/radio',
async: false,
cache: false,
data: {radio: $radio},
// datatype: "html",
success:function(){
alert($radio);
}
});
$.ajax({
type: 'GET',
url: '<?=Yii::app()->baseUrl;?>/ideyalar/sech/radio',
async: false,
cache: false,
datatype: "json",
data: {change: $sql},
success: function(data) {
alert(data.change);
}
});
});
</script>
....
controller action
public function actionSech ($radio)
{
$sql = Yii::app()->db->createCommand()
->select ('m.maraq')
->from ('maraq m')
->where ('m.idsinif=:ids', [':ids'=>$radio])
->queryAll();
$gonderilen = CJSON::encode(['change'=>$sql]);
}
I read articles from Yii offical site and other forums. But I couldn't understand how can I do it.
Please tell me, how can I send $sql variable to my view file?
Thanks.

Answer 1

I'm not pretty sure what you want. But, I want to pointing out some snippet.
In view file
<?php
Yii::app()->clientScript->registerScript("header-info","
var baseUrl = '".Yii::app()->baseUrl;."';
",CClientScript::POS_HEAD);
?>
<button id="radiyo">radio</button>
<script>
$("#radiyo").on("click", function(){
var radioValue = $('input[type=radio][name=siniflerin-siyahisi]:checked').attr('id');
$.ajax({
url: baseUrl +'/ideyalar/sech',
dataType:'json',
type:'POST',
data:{radioValue:radioValue},
async:false
}).done(function(data){
if(data['status'] == 'OK'){
alert(data['returnValue']);
}else if(data['status'] == 'ERROR'){
alert("HERE WE GO ERROR");
}
});
});
</script>
Your controller action;
public function actionSech()
{
//In my point, I never call db layer in controller. Controller should be routing purpose
If(Yii::app()->request->isAjaxRequest){
$radioValue = isset($_REQUEST['radioValue']) ? $_REQUEST['radioValue'] : "";
$returnObj = array();
if($radioValue !=""){
$query = "SELECT `maraq` FROM maraq WHERE idsinif='$radionValue'";
$result = Yii::app()->db->createCommand($query)->queryScalar();
if($result != "" || $result != null){ //ensure result is correct or not
$returnObj['returnValue'] = $result;
$returnObj['status'] = 'OK';
}else{
$returnObj['status'] = 'ERROR';
}
}else{ //if radiovalue is blank string
$returnObj['status'] = 'ERROR';
}
echo json_encode($returnObj);
}
}
Hope this help! Btw, JavaScript variable can't not initialize with $. Just only var yourVar="";