Zend Framework JSON Output - php

Question

In controller I am generating a special form by ID, passed from AJAX. Form output is JSON. Form creates finely. But my problem is to show this JSON in view. How?
Thank you.

Answer 1

In controller (http://framework.zend.com/manual/en/zend.controller.actionhelpers.html#zend.controller.actionhelpers.json):
$this->getHelper('json')->sendJson(array(
'param1' => 'v1'
'param2' => 'v2'
));
In view (http://framework.zend.com/manual/en/zend.view.helpers.html#zend.view.helpers.initial.json):
<?php
echo $this->json(array(
'param1' => 'v1'
'param2' => 'v2'
));
?>

Answer 2

json is a encoded string containing vars in js style if you need to access the member in this string you need to json_decode the string so
$result = json_decode($jsonString);
but note that json treat php associative array like php object ... so if you pass an array you can access it as $result->memberReference not $result['memberReference'];

Answer 3

The easiest way is to stop view from being executed:
function jsonAction () {
....
print $json;
exit;
}
Also see check http://pl.php.net/json_encode if you don't have JSON string already.

Answer 4

You can use Zend class
$sData = Zend_Json::encode($aArray);
Or you can use advanced scenario like:
$data = array(
'onClick' => new Zend_Json_Expr('function() {'
. 'alert("I am a valid javascript callback '
. 'created by Zend_Json"); }'),
'other' => 'no expression',
);
$jsonObjectWithExpression = Zend_Json::encode($data,false,
array('enableJsonExprFinder' => true)
);

Answer 5

The best way todo this in my opinion is to assign one controller as your json output, then you can do this:
class Api_IndexController extends Zend_Controller_Action {
public function init() {
$this->data = array();
}
public function preDispatch() {
$this->variables = $this->_getAllParams();
}
public function postDispatch() {
$this->_helper->json($this->data);
}
public function __call($name, $args) {
return;
}
public function forumAction () {
$this->mapper = new ORM_Model_Mapper_Forum();
$this->model = new ORM_Model_Forum();
$this->dbTable = new ORM_Model_DbTable_Forum();
if (isset($this->variables['id']) && is_numeric($this->variables['id'])) {
$output = $this->model->find($this->variables['id']);
if ($output->id == null) {
return $this->_setError(404);
}
} else {
$output = $this->mapper->fetchAllToArray();
}
$this->data = $output;
}
private function _setError($code=500) {
$this->data = array('error' => $code);
}
}