Add new key/value pair into JSON in PHP - php

Question

I have a result from my MySQL DB that I'm json encoding in PHP, the result looks like
:
[
{
"id": "8488",
"name": "Tenby",
"area": "Area1"
},
{
"id": "8489",
"name": "Harbour",
"area": "Area1"
},
{
"id": "8490",
"name": "Mobius",
"area": "Area1"
}
]
What I would like to do is to add a new key/value pair to that JSON so that it will be :
[
{
"id": "8488",
"name": "Tenby",
"area": "Area1",
"image": "1278.jpg"
},
{
"id": "8489",
"name": "Harbour",
"area": "Area1",
"image": "1279.jpg"
},
{
"id": "8490",
"name": "Mobius",
"area": "Area1",
"image": "1280.jpg"
}
]
So how can I do that in PHP?

Answer 1

<?php
$data[0]['id']="8488";
$data[0]['name']="Tenby";
$data[0]['area']="Area1";
$data[1]['id']="8489";
$data[1]['name']="Harbour";
$data[1]['area']="Area1";
$data[2]['id']="8490";
$data[2]['name']="Mobius";
$data[2]['area']="Area1";
echo json_encode($data)."<br/>";
/*Add Image element (or whatever) into the array according to your needs*/
$data[0]['image']="1278.jpg";
$data[1]['image']="1279.jpg";
$data[2]['image']="1280.jpg";
echo json_encode($data);
?>

Answer 2

PHP is not very good with JSON. Its best to convert from JSON to Array to do this - what #egig has also recommended.
Example code:
$temp = json_decode($json);
$temp[] = new data, whatever you want to add...;
$json = json_encode($temp);
Hope this helps.

Answer 3

hu?
the result of the db query will be an array or an object...
add the additional entry to that data, only encode after every necessary data manipulation is done
alternatives, but clumsy (horrible):
json_decode, add stuff, json_encode
build your additional data as a string, str_replace for example "area": "Area1" in your json string with "area": "Area1", "image": "1278.jpg"
but really:
output formatting like json_encode should only be done once you are sure that you have the whole output together and it is send out

Answer 4

Maybe things have changed since then, but I know this will work at this current stage:-
So here is the JSON string:-
$strJSON = '[
{
"id": "8488",
"name": "Tenby",
"area": "Area1"
},
{
"id": "8489",
"name": "Harbour",
"area": "Area1"
},
{
"id": "8490",
"name": "Mobius",
"area": "Area1"
}
]';
If this is still a string, then I would convert it into an object like this:-
$json = json_decode( $strJSON );
Now that it is in object format, to add my "image" keys with their values, I would then add them like it is shown below:-
$json[0]->image = "1278.jpg";
$json[1]->image = "1279.jpg";
$json[2]->image = "1280.jpg";
So then if I add the code below after the above code:-
echo "<pre>";
print_r( $json );
echo "</pre>";
We should then see it outputting on the page like so:-
Array
(
[0] => stdClass Object
(
[id] => 8488
[name] => Tenby
[area] => Area1
[image] => 1278.jpg
)
[1] => stdClass Object
(
[id] => 8489
[name] => Harbour
[area] => Area1
[image] => 1279.jpg
)
[2] => stdClass Object
(
[id] => 8490
[name] => Mobius
[area] => Area1
[image] => 1280.jpg
)
)

Answer 5

//$index = some value in array;
for($i=0;$i<count($index);$i++){
$data[$i]->key = $index[$i];
}
print $data;