Add another item to array associative in php - php

Question

im having some issues adding a new item to an associative array,
This is how i'm creating my structure:
$cpdata[$count] = array(
'value' => $value->value,
'images' => array(
'color' => $value->color,
'image' => $value->image,
),
);
and this is how it looks like when i output like a json:
{
"value": "BOX",
"images": {
"color": "white",
"image": "white.png"
}
}
But i would like to add more items to images somthing like this:
{
"value": "BOX",
"images": [
{
"color": "white",
"image": "white.png"
},
{
"color": "black",
"image": "black.png"
},
{
"color": "gray",
"image": "gray.png"
}
]
}
I've tried with array_push and array_merge but i cant get it
i've tried array_push($cpdata['images'][$count]['images'], 'color'=>'red', image' => 'red.png')
Could you please help me?
Regards
Mario

Answer 1

In context of PHP, what you have there is a JSON variable. If that is coming to you as a string you'll have to decode it first using json_decode($string);
Then you can set up an object, populate it with the image variables and write it back to the $json object as an array, like:
<?php
// example code
$json = <<<EOT
{
"value": "BOX",
"images": {
"color": "white",
"image": "white.png"
}
}
EOT;
$json = json_decode($json);
$i = new stdClass;
$i->color = $json->images->color;
$i->image = $json->images->image;
$json->images = array($i);
After that you can push to it like
$newimage = new stdClass;
$newimage->color = "foo";
$newimage->image = "bar";
$json->images[] = $newimage;
output
print_r($json);
stdClass Object
(
[value] => BOX
[images] => Array
(
[0] => stdClass Object
(
[color] => white
[image] => white.png
)
[1] => stdClass Object
(
[color] => foo
[image] => bar
)
)
)
example https://www.tehplayground.com/oBS1SN1ze1DsVmIn

Answer 2

Before converting into json
$cpdata[$count] = array(
'value' => $value->value,
'images' => array(
'color' => $value->color,
'image' => $value->image,
),
);
// Cpdata array has $count which has `images` as an array and we want to push another element(array) into images array
array_push($cpdata[$count]['images'], ['color'=>'red', 'image' => 'red.png']);