PHP delete array index through value - php

Question

I'm trying to unset two specific array positions which contain two values.
My actual code to fill the array.
function get_store_list(){
$data = #file_get_contents('http://www.zwinky.com/xml/clothingList.xml');
$data = #simplexml_load_string($data);
$data = $data->xpath('//stores/store');
foreach($data as $store) {
$storeArray[] = array(
"name" => (string)$store['name'],
"id" => (string)$store['id']
);
}
return $storeArray;
}
$store = get_store_list();
The array looks like the following incase ill echo it out using print_r function:
Array
(
[0] => Array
(
[name] => Artizans
[id] => 20037336
)
[1] => Array
(
[name] => Bwabies!
[id] => 20080134
)
[2] => Array
(
[name] => Crave Mart
[id] => 20097365
)
[3] => Array
(
[name] => David & Goliath
[id] => 20099998
)
[4] => Array
(
[name] => Domo
[id] => 20098166
)
[5] => Array
(
[name] => Emily the Strange
[id] => 20101926
)
[6] => Array
(
[name] => Garfield
[id] => 20098167
)
[7] => Array
(
[name] => Jetsetter
[id] => 26
)
[8] => Array
(
[name] => Like Dat
[id] => 3
)
[9] => Array
(
[name] => Paris Hilton
[id] => 21
)
[10] => Array
(
[name] => Peppermint Place
[id] => 12
)
[11] => Array
(
[name] => Rocawear
[id] => 19
)
[12] => Array
(
[name] => ShoeBuy
[id] => 10
)
[13] => Array
(
[name] => Skelanimals
[id] => 20100198
)
[14] => Array
(
[name] => Snoop Dogg
[id] => 20
)
[15] => Array
(
[name] => SW&TH
[id] => 20096121
)
[16] => Array
(
[name] => The Castle
[id] => 1
)
[17] => Array
(
[name] => The Lair
[id] => 4
)
[18] => Array
(
[name] => The Mix
[id] => 923
)
[19] => Array
(
[name] => The Powerpuff Girls
[id] => 20098121
)
[20] => Array
(
[name] => The Surf Shop
[id] => 5
)
[21] => Array
(
[name] => Tie The Knot
[id] => 20076231
)
[22] => Array
(
[name] => tokidoki
[id] => 20099224
)
[23] => Array
(
[name] => University Club
[id] => 2
)
[24] => Array
(
[name] => Z Avenue
[id] => 6
)
[25] => Array
(
[name] => Z's Greetings
[id] => 20099506
)
)
Now $store does contain 2 array indexes which I have to delete. Which are the following ids: 21 and 20076231
I've been trying the following already:
Array search code without beeing success. Does anyone have a idea what I could try?

Answer 1

There are a handful different approaches for this simple issue. One of them could be using function array_filter():
/**
* #param array $list the list to process
* #param array $IDsToRemove the IDs of elements to remove from $list
* #return array a subset of $list that does not contain elements having 'id' in $IDsToRemove
*/
function removeFromArray(array $list, array $IDsToRemove)
{
return array_filter(
// Filter the input list...
$list,
// ... using a function...
function (array $item) use ($IDsToRemove) {
// ... that accepts an element if its "id" is not in $IDsToRemove
return ! in_array($item['id'], $IDsToRemove);
}
);
}
// Usage
$filteredStore = removeFromArray($store, array(21, 20076231));

Answer 2

Try this in your loop, this will not include in your array than no need to unset like this:
foreach($data as $store) {
if($store['id'] == '20076231')
continue;
$storeArray[] = array(
"name" => (string)$store['name'],
"id" => (string)$store['id']
);
}

Answer 3

If you need to unset an item from your array after it's been created, take a look at array_map.
First map your array to retrieve the index of each ID.
$map = array_map(function($item){ return $item['id']; }, $store);
Then get the index of your ID from the map (e.g. 21).
$index = array_search(21, $map);
Then remove with array_splice.
array_splice($store, $index, 1);

Answer 4

why not use directly the id in your $storeArray? And as it seems to be integer why do you force it to (string)?
Try this:
function get_store_list(){
$data = #file_get_contents('http://www.zwinky.com/xml/clothingList.xml');
$data = #simplexml_load_string($data);
$data = $data->xpath('//stores/store');
foreach($data as $store) {
$storeArray[(int)$store['id']] = array(
"name" => (string)$store['name']
);
}
return $storeArray;
}
// delete the keys you want
unset ($storeArray[21], $storeArray[20076231]);
// or if you have more ids to delete you can create a deleteArray
$deleteArray = array(2, 20076231);
foreach ($deleteArray as $toDelete){
unset($storeArray($toDelete);
}

Answer 5

One line code is cool but sometimes explicit code is preferable.
function filter_by_id(array $data, $id)
{
foreach ($data as $k => &$v) {
foreach ((array) $id as $i) {
if ($v['id'] === $i) {
$v = null;
}
}
}
// 'array_filter()' produces a new array without the null entries.
// 'array_values()' produces a new array with indexes without gaps.
return array_values(array_filter($data));
}
You can filter by one id at time
$store = filter_by_id($store, 21);
Or you can filter multiple ids at the same time:
$store = filter_by_id($store, [21, 20076231]);