It is possible to put an array into a multi dim array? I have a list of user settings that I want to return in a JSON array and also have another array stored in that JSON array...what is the best way to do that if it isn't possible?
A multi dimension is already an array inside an array. So there's nothing stopping you from putting another array in there. Sort of like dreams within dreams :P
Just use associative arrays if you want to give your array meaning
array(
'SETTINGS' => array(
'arr1' => array( 0, 1),
'arr2' => array( 0, 1)
),
'DATA' => array(
'arr1' => array( 0, 1),
'arr2' => array( 0, 1)
)
)
EDIT
To answer your comment, $output_files[$file_id]['shared_with'] = $shared_info; translates to (your comment had an extra ] which I removed)
$shared_info = array(1, 2, 3);
$file_id = 3;
$output_files = array(
'3' => array(
'shared_with' => array() //this is where $shared_info will get assigned
)
);
//you don't actually have to declare it an empty array. I just did it to demonstrate.
$output_files[$file_id]['shared_with'] = $shared_info; // now that empty array is replaced.
any array key can have an array value in php, as well as in json.
php:
'key' => array(...)
json:
"key" : [...]
note: php doesn't support multidimensional arrays as in C or C++. it's just an array element containing another array.
Related
`Say I have an associative array like so:
$array = array(
'names' => array('amy','john', 'peter'),
'places' => array('milan', 'venice', 'amsterdam'),
'uncategorized' => array('desk', 'plane', 'silly'),
'jobs' => array('singer', 'clerk', 'broker')
);
Now suppose I want to save uncategorized into a new array and remove it from $array, I can do:
$uncategorized = $array['uncategorized'];
unset($array['uncategorized']);
My question is, is there any single function that does it kind of like how array_pop returns the last value and shortens the array by that element?
got a multidimensional array and a string in a config and i need to transform it as an array key without the use of eval. Real world use of this problems is that i got a big document from mongodb that is transformed into multi dimensional array. However i need to define specific array nodes from a config file.
the idea is to create a config file as representation of the array key's hierarchy
on the config.ini the values below are some example.
colorattribute = attribute.color
wholesaleprice = prices.wholesale
Example Response from mongoDb
<?php
$products = array(
'product_name' => 'iTouch',
'brand_name' => 'Apple',
'attributes' => array ( 'color' => 'black',
'size' => '5 in'
),
'prices' => array(
'wholesale' => 135,
'retail' => 200,
),
);
function recurseKeys(array $keys,array $array){
$key = array_shift($keys);
if(!isset($array[$key])) return null;
return empty($keys) ?
$array[$key]:
recurseKeys($keys,$array[$key];
}
var_dump(recurseKeys(explode('.',$testConfig),$products);
How do I push arrays inside the "adjacencies" key value pair that should have an encapsulated array holding the "arrays" (ie. array(("nodeTo" => "$to"),("nodeTo" => "$to"))) without overwriting them and appending them similiar to "+=". also the push into the key "adjacencies" doesnt seem to pick up the value.
$node[] = array(
"adjacencies" => array(), //inside this array should go all the arrays seprated by commas.
"data" => array(
"color" => $color1,
"type" => $type1
);
// this push doesnt seem to detect the adjacencies value and doesnt really push the array inside of the container array. I also tried $node["adjacencies"][]=array("nodeTo" => "$to"); but it didnt work
$node["adjacencies"]=array("nodeTo" => "$to");
}
If you want multiple arrays within 'adjacencies', append them to the end of the array:
$node[0]['adjacencies'][] = array("nodeTo" => "$to");
Granted, you'll need to know which $node index to work with (if there are multiple nodes).
Edit:
After reading the comments, it looks like the OP's desired array structure is this:
$node = array(
'adjacencies' => array(),
'data' => array(
'color' => $color1,
'type' => $type1,
);
);
Thus, to append additional nodes to the adjacencies array, you can do this:
$node['adjacencies'][] = array('nodeTo' => "$to");
By the way you use $node in the second statement I think you meant:
$node = array(
not:
$node[] = array(
// ^^
Then you can push the array by doing:
$node['adjacencies'][] = array('nodeTo' => $to);
I have an array of values in PHP looking something like this:
$test = array (
array( 'val' => 2, 'color' => 'blue' ),
array( 'val' => 5, 'color' => 'green' ),
);
I want to go through all elements of $test and add 1 to all val indices. Now I realize a foreach loop could work, but I am looking for something a little more efficient. The array will potentially have 10's of thousands of elements and hundreds of sub-elements.
I am wondering if there is some type of way that PHP can go through and modify just that index throughout the entire array, based on the argument that I set.
you can use array_walk and a closure to do it
array_walk($yourArray,function(&$col){$col['val']++});
I have an array that looks like this:
Array([0]=>Array([id]=>7 [name]=foo) [1]=>Array([id]=>10 [name]=bar) [2]=>Array([id]=>15 [name]=baz))
Each index contains an another array with various elements including an 'id'. I would like to "go up" a level, such that my top-level array is indexed by the ID element of the corresponding nested arrays, but that index still contains an array with all of the elements that were in the sub arrays?
In other words, how can I use PHP to turn the above array into this:
Array([7]=>Array([id]=>7 [name]=foo) [10]=>Array([id]=>10 [name]=bar) [15]=>Array([id]=>15 [name]=baz))
What you need to do here is extract the ids from each sub-array in your input. If you have these as an array of ids, you are just an array_combine call away from re-indexing your original array to use these ids as the keys.
You can produce such an array of ids using array_map, which leads to:
// input data
$array = array(array('id' => '7', 'name' => 'foo'),array('id' => 10, 'name' => 'bar'));
// extract ids from the input array
$ids = array_map(function($arr) { return $arr['id']; }, $array);
// "reindex" original array using ids as array keys, keep original values
$result = array_combine($ids, $array);
print_r($result);
The syntax I 've used for the anonymous function (first argument to array_map) requires PHP >= 5.3, but you can achieve the same (although a bit less conveniently) with create_function in any PHP version you 'd not be ashamed of using.
See it in action.
In modern, supported versions of PHP, this whole task can be achieved with array_column() alone.
Using null as the second parameter will leave the rows unchanged.
Using id as the 3rd parameter will assign those columnar values as the new first level keys. Be aware that if these columnar values are not unique, subsequently encountered duplicates will overwrite previously encountered rows with the same id value -- this is because keys cannot be duplicates on a given level in an array.
DO NOT bother calling array_combine(), it is simply unnecessary/indirect.
Code: (Demo)
$array = [
['id' => 7, 'name' => 'foo'],
['id' => 10, 'name' => 'bar'],
['id' => 15, 'name' => 'baz'],
];
var_export(
array_column($array, null, 'id')
);
Output:
array (
7 =>
array (
'id' => 7,
'name' => 'foo',
),
10 =>
array (
'id' => 10,
'name' => 'bar',
),
15 =>
array (
'id' => 15,
'name' => 'baz',
),
)
Try this:
$newArray = array();
foreach($oldArray as $key => $value) {
$newArray[$value['id']] = $value;
}
Since PHP 5.5.0, you can shorten the code by using array_column() instead of array_map().
$result = array_combine(array_column($array, 'id'), $array);