Add element to array then encode it to json - php

Question

I have this code
$data['events'] = $this->calendar_model->get_events();
foreach ($data['events'] as $arr) {
settype($arr,"array");
$arr['something'] = false;
//print_r($arr);
}
echo json_encode($arr);
what I am trying to do is to add something => false to each record of the array
so lets say I got from the database
array of
title:"aaaaa",
start: "xxxx",
end: "cccc",
I want to add to each one something :false to become like
title:"aaaaa",
start: "xxxx",
end: "cccc",
something,false
for each record
but the problem is when I print using the print_r its fine, but the json_encode print only the last one.

Answer 1

Passing by value vs. by reference
You are passing your $arr by value in your foreach loop. Try to pass it by reference.
This is done by adding a & just before your $arr variable in your loop declaration:
foreach ($data['events'] as &$arr) {
settype($arr,"array");
$arr['something'] = false;
}
echo json_encode($data['events']);
How it works
Passing by value means that your foreach loop instanciates a local copy or your array. All modifications made inside the loop will affect only the local copy.
Passing by reference means that inside your loop, you are working directly on the original array. But be careful when doing that because it can be dangerous. For instance, I don't know what are the consequences of calling setType($arr,"array"); for the rest of your code.

Answer 2

You're not collecting $arr from each iteration of your loop into anything. It looks like you probably want to push $arr onto another array that stores everything, and then JSON encode that new array.
Try this:
$collection = array();
$data['events'] = $this->calendar_model->get_events();
foreach ($data['events'] as $arr) {
settype($arr,"array");
$arr['something'] = false;
array_push($collection, $arr);
}
echo json_encode($collection);

Answer 3

$data['events'] = $this->calendar_model->get_events();
foreach ($data['events'] as &$arr) {
settype($arr,"array");//This if there is not array
$arr['something'] = false;
}
echo json_encode($data['events']);

Answer 4

Try to make your own json like this
$strJson = '';
$data['events'] = $this->calendar_model->get_events();
foreach ($data['events'] as $arr) {
settype($arr,"array");
$arr['something'] = false;
//Assign value as yours in blow code
$strJson .= '{"title" : "'.$arr.'","start" : "'.$arr.'","end" : "'.$arr.'"},';
}
$strJson1=rtrim($strJson, ",");
$newStr = '['.$strJson1.']';
echo $newStr;