Push array into an array using array_push - php

Question

I have four elements of data stored in variables.
I wish to create a multi-dimensional array.
Firstly, I wish the ID to be the main key for the array. And within the ID key, I wish to store description, image_med and image_full
I have started by initialising an array and pushing the ID:
$image_id = $image['id'];
$this_image = array();
array_push($this_image, $image_id);
The result is:
array(1) {
[0]=>
int(2161)
}
Now I wish to push three more elements into this ID array. I'd like to create something like the following:
array(1) {
['ID']=>
int(2161)
array(3){
['description'] => string(Description goes here),
['medium'] => string(http://www.blah.com/12345),
['full'] => string(http://www.blah.com/67890)
}
}
So first of all the parent key is called ID not just [0]
And secondly that the following three variables are added with their keys:
description ($image_desc is the variable)
medium ($image_med is the variable)
full ($image_full is the variable)
How would I do this?

Answer 1

Let $id be the id of the image:
$array=array();
//then you can use this code in a loop:
$array[$id]=array(
'description'=>$image_desc,
'medium'=>$image_med,
'full'=> image_full
);
There is no need to use array_push function, actually array_push has a little worse performance because of function call's overhead (this is an advanced topic, anyway)

Answer 2

is that what you are looking for ?
$images = array(); // an array of all images
$image_id = $image['id'];
$images[$image_id] = array(
'ID' => $image_id, // optional, would be repeating id you already have
'description' => "Blabla",
'medium' => "Blabla",
'full' => "Blabla",
);
You would do that automatically in a loop I suppose thought... And if you dont need the ID as "key", what about:
$images = array();
$image1 = array(
'ID' => $image_id,
'description' => "Blabla",
'medium' => "Blabla",
'full' => "Blabla",
);
array_push($images, $image1);
Not sure what you are looking to achieve though.

Answer 3

Your question is not very clear. What you probably need could be something like this:
// Create a list (of images)
$listImages = array();
// Information about an image (it can be constructed as displayed here,
// retrieved from a database or from other source)
$image = array(
'id' => 123,
'description' => 'Nice kitty',
'medium' => 'http://www.blah.com/12345',
'full' => 'http://www.blah.com/67890',
);
// Extract the ID of the image into a variable (this is for code clarity)
$imageId = $image['id'];
// Store the image in the list, indexed by image ID
$listImages[$imageId] = $image;
// Get/create another image...
$image = array(
'id' => 456,
'description' => 'another kitty',
// ... other fields here
);
// ... put it into the list (skip the helper variable $imageId)
$listImages[$image['id']] = $image;
This is how the output of print_r($listImages) looks like:
Array
(
[123] => Array
(
[id] => 123
[description] => Nice kitty
[medium] => http://www.blah.com/12345
[full] => http://www.blah.com/67890
)
[456] => Array
(
[id] => 456
[description] => another kitty
)
)