− Table of content
JSON is a data format using javascript syntax techniques. this ease greatly the use of JSON encoded data in HTML content.
To send JSON data, there is a specific jResponseJson object. Its alias is "json". All you need to do is to assign your encoded json to the $data property:
$resp = $this->getResponse('json');
$resp->data = array( 'lastname'=>'dupont', 'firstname'=>'jean');
return $resp;
To call the action, in raw javascript :
http = new XMLHttpRequest();
//url is a variable which contains the url of the action
http.open("post", url, true);
// handleJSONReturn is a function called when the response is received
http.onreadystatechange = handleJSONReturn;
http.send(null);
// url is a string conatining a php url.
// handleJSONReturn is a function treating return state.
ou, avec jQuery :
$.getJSON( url, function (json) {
// do something with your json data
}
The client will receive:
{ "lastname":"dupont", "firstname":"jean"}
And treat it alike
var json = eval('(' + http.responseText + ')');
alert(json.lastname + ' ' + json.firstname);
Alternatively, the whole client process with jQuery is :
$.getJSON( url, function (json) {
alert(json.lastname + ' ' + json.firstname);
});
a use case combined with jDao ¶
$countryDao = jDao::get('common~country');
$countries = $countryDao->findAll();
$response = $this->getResponse('json');
$response->data = array();
foreach($countries as $country) {
$response->datas[] = array('id' => $country->id , 'name' => $country->name);
}
the client will receive:
{ "id":20, "name":"Europe"}
