I've got a multidimensional PHP array in that form:
array(
(int) 0 => array(
'Category' => array(
'id' => '01',
'title' => 'SomeCategory'
)
),
(int) 1 => array(
'Category' => array(
'id' => '02',
'title' => 'OtherCategory'
)
)
)
I want to get the title of the category with a specific id, e.g. SomeCategory when I have the id 01.
Is there a better (more performant or easier) way to do it than this one?
foreach($categories as $nestedCategory) {
foreach($nestedCategory as $category) {
if($category['id'] === $postedData['Submission.Category.0.id']) {
debug($category['title']);
}
}
}
Thanks!
If the id's are unique you could rewrite the array
foreach( $array as $n => $item ) {
$arr[$item['Category']['id']] = $item;
}
// get id 02
echo $arr['02']['Category']['title']; // output: OtherCategory
Related
I have an array of arrays, as such
$statuses = array(
[0] => array('id'=>10, 'status' => 'active'),
[1] => array('id'=>11, 'status' => 'closed'),
[2] => array('id'=>12, 'status' => 'active'),
[3] => array('id'=>13, 'status' => 'stopped'),
)
I want to be able to make a new array of arrays and each of those sub arrays would contain the elements based on if they had the same status.
The trick here is, I do not want to do a case check based on hard coded status names as they can be random. I want to basically do a dynamic comparison, and say "if you are unique, then create a new array and stick yourself in there, if an array already exists with the same status than stick me in there instead". A sample result could look something like this.
Ive really had a challenge with this because the only way I can think to do it is check every single element against every other single element, and if unique than create a new array. This gets out of control fast if the original array is larger than 100. There must be some built in functions that can make this efficient.
<?php
$sortedArray = array(
['active'] => array(
array(
'id' => 10,
'status' => 'active'
),
array(
'id' => 12,
'status' => 'active'
)
),
['closed'] => array(
array(
'id' => 11,
'status' => 'active'
)
),
['stopped'] => array(
array(
'id' => 13,
'status' => 'active'
)
),
)
$SortedArray = array();
$SortedArray['active'] = array();
$SortedArray['closed'] = array();
$SortedArray['stopped'] = array();
foreach($statuses as $Curr) {
if ($Curr['status'] == 'active') { $SortedArray['active'][] = $Curr; }
if ($Curr['status'] == 'closed') { $SortedArray['closed'][] = $Curr; }
if ($Curr['status'] == 'stopped') { $SortedArray['stopped'][] = $Curr; }
}
You can also do it with functional way though it's pretty the same like Marc said.
$sorted = array_reduce($statuses, function($carry, $status) {
$carry[$status['status']][] = $status;
return $carry;
}, []);
I want to delete array index which contain rating 0 here is my array
array(
(int) 0 => array(
'Gig' => array(
'id' => '1',
'rating' => (int) 5
)
),
(int) 1 => array(
'Gig' => array(
'id' => '3',
'rating' => (int) 9
)
),
(int) 2 => array(
'Gig' => array(
'id' => '4',
'rating' => '0'
)
)
)
and what I did
for($i = 0; $i<count($agetGigsItem); $i++)
{
if($agetGigsItem[$i]['Gig']['rating']==0)
{
unset($agetGigsItem[$i]);
}
$this->set('agetGigsItem', $agetGigsItem);
}
i also try foreach loop but unable to resolve this issue.
foreach ($agetGigsItem as $key => $value) {
if ($value["Gig"]["rating"] == 0) { unset($agetGigsItem[$key]); }
}
I think you need to reupdate your array.
foreach ($agetGigsItem as $key => $value) {
if ($value["Gig"]["rating"] != 0)
{
unset($agetGigsItem[$key]);
}
$this->set('agetGigsItem', $agetGigsItem);
}
I hope you are missing $this and so you cannot access the array in CakePHP.
So try this:
foreach ($this->$agetGigsItem as $key => $value) {
if ($value["Gig"]["rating"] == 0) {
unset($this->$agetGigsItem[$key]);
}
}
This code will unset arrey index with value 0.
<?php
$array=array(
array(
'Gig' => array(
'id' => '1',
'rating' =>5
)
),
array(
'Gig' => array(
'id' => '3',
'rating' =>9
)
),
array(
'Gig' => array(
'id' => '4',
'rating' =>0
)
)
);
foreach($array as $a){
if($a['Gig']['rating']==0){
unset($a['Gig']['rating']);
}
$array1[]=$a;
}
var_dump($array1);
Destroying occurances within an array you are actually processing over with a for or a foreach is always a bad idea. Each time you destroy an occurance the loop can easily get corrupted and get in a terrible mess.
If you want to remove items from an array it is better to create a copy of the array and process over that new array in the loop but remove the items from the original array.
So try this instead
$tmparray = $this->agetGigsItem; // will copy agetGigsItem into new array
foreach ($tmparray as $key => $value) {
if ($value["Gig"]["rating"] == 0) {
unset($this->agetGigsItem[$key]);
}
}
unset($tmparray);
I have a multidimensional array and I need to count how many items are in each category:
array (
array(
'name' => 'Bob',
'category' => '2'
),
array(
'name' => 'Bill',
'category' => '6'
),
array(
'name' => 'John',
'category' => '1'
),
array(
'name' => 'Jack',
'category' => '2'
),
)
I want to be able to split these up into categories.
For example;
Category 2 contains 2 items
Category 1 contains 1 item
Category 6 contains 1 item
Just to get the count of each category would be great, but to be able to re-arrange the array into categories would also be useful. I'd like to be able to do both.
I've tried searching StackOverflow but I couldn't find this specific query. I'm guessing this may use array_map somewhere but I'm not good with that function.
Any help is greatly appreciated!
If your array isn't too big a straightforward approach might be the easiest one. Create a new array, use categories as keys and iterate over your array, counting items.
I have written 3 functions that solves the criteria you have described. Keep in mind these functions are bare minimum and lack error handling. It is also assumed the $categories array which all the functions requires has the structure outlined in your question.
The first rearranges all items into the correct category.
function rearrangeCategories(array $categories) {
$calculated = [];
foreach($categories as $category) {
$calculated[$category['category']][] = $category['name'];
}
return $calculated;
}
The second creates an associative array of the amount of items in each category. The array index is the category name/id and the value is an integer declaring the amount of items.
function categoriesCount(array $categories) {
$calculated = [];
$arranged = rearrangeCategories($categories);
foreach($arranged as $category => $values) {
$calculated[$category] = count($values);
}
return $calculated;
}
The third function checks how many items are stored inside a specific category. If the category doesn't exists FALSE is returned. Otherwise an integer is returned.
function categoriesItemCount(array $categories, $key) {
$arranged = rearrangeCategories($categories);
if(!array_key_exists($key, $arranged)) {
return false;
}
return count($arranged[$key]);
}
I hope this helps, happy coding.
You can use something like this
$arr =
array (
array(
'name' => 'Bob',
'category' => '2'
),
array(
'name' => 'Bill',
'category' => '6'
),
array(
'name' => 'John',
'category' => '1'
),
array(
'name' => 'Jack',
'category' => '2'
),
);
$categoryCount = array();
$categoryList = array();
array_map(function($a) use (&$categoryCount, &$categoryList) {
$categoryId = $a['category'];
if (!isset($categoryCount[$categoryId])) {
$categoryCount[$categoryId] = 0;
}
$categoryCount[$categoryId]++;
if (!isset($categoryList[$categoryId])) {
$categoryList[$categoryId] = array();
}
$categoryList[$categoryId][] = $a['name'];
}, $arr);
print_r($categoryCount);
print_r($categoryList);
This will create 2 arrays: one with the counts and one with the elements rearranged
Try this way, i think it will fulfill your requirements.
$arr=array (
array(
'name' => 'Bob',
'category' => '2'
),
array(
'name' => 'Bill',
'category' => '6'
),
array(
'name' => 'John',
'category' => '1'
),
array(
'name' => 'Jack',
'category' => '2'
),
);
$result = call_user_func_array('array_merge_recursive', $arr);
//for just show array
print '<pre>';
print_r(array_count_values($result['category']));
print '</pre>';
//loop as you need
foreach(array_count_values($result['category']) as $k=>$v){
$item=($v>1)? 'items':'item';
echo "Category ".$k." Contains " .$v." ".$item."<br/>";
}
I have an Multidimensional array that takes a similar form to this array bellow.
$shop = array( array( Title => "rose",
Price => 1.25,
Number => 15
),
array( Title => "daisy",
Price => 0.75,
Number => 25,
),
array( Title => "orchid",
Price => 1.15,
Number => 7
)
);
I would like to see if a value I'm looking for is in the array, and if so, return the position of the element in the array.
Here's a function off the PHP Manual and in the comment section.. Works like a charm.
<?php
function recursive_array_search($needle,$haystack) {
foreach($haystack as $key=>$value) {
$current_key=$key;
if($needle===$value OR (is_array($value) && recursive_array_search($needle,$value) !== false)) {
return $current_key;
}
}
return false;
}
Found this function in the PHP docs: http://www.php.net/array_search
A more naive approach than the one showed by Zander, you can hold a reference to the outer key and inner key in a foreach loop and store them.
$outer = "";
$inner = "";
foreach($shop as $outer_key => $inner_array){
foreach($inner_array as $inner_key => $value) {
if($value == "rose") {
$outer = $outer_key;
$inner = $inner_key;
break 2;
}
}
}
if(!empty($outer)) echo $shop[$outer][$inner];
else echo "value not found";
You can use array_map with in_array and return the keys you want
$search = 1.25;
print_r(
array_filter(array_map(function($a){
if (in_array($search, $a)){
return $a;
}
}, $shop))
);
Will print:
Array
(
[0] => Array
(
[Title] => rose
[Price] => 1.25
[Number] => 15
)
)
php >= 5.5
$shop = array( array( 'Title' => "rose",
'Price' => 1.25,
'Number' => 15
),
array( 'Title' => "daisy",
'Price' => 0.75,
'Number' => 25,
),
array( 'Title' => "orchid",
'Price' => 1.15,
'Number' => 7
)
);
$titles = array_column($shop,'Title');
if(!empty($titles['rose']) && $titles['rose'] == 'YOUR_SEARCH_VALUE'){
//do the stuff
}
Well, I am here again dealing with arrays in php. I need your hand to guide me in the right direction. Suppose the following array:
-fruits
--green
---limon
---mango
--red
---apple
-cars
--ferrari
---enzo
----blue
----black
---318
--lamborg
---spider
---gallardo
----gallado-96
-----blue
-----red
-----gallado-98
The - (hyphen) symbol only illustrates the deep level.
Well, I need to build another array (or whatever), because it should be printed as an HTML select as below:
-fruits
--green
---limon
---mango
--red
---apple
-cars
--ferrari
---enzo
----blue
----black
---318
--lamborg
---spider
---gallardo
----gallado-96
-----blue
-----red
-----gallado-98
Looks that for each level element, it should add a space, or hyphen to determinate that it belongs to a particular parent.
EDIT
The have provide an answer provideng my final code. The html select element will display each level as string (repeating the "-" at the begging of the text instead multi-level elements.
Here's a simple recursive function to build a select dropdown given an array. Unfortunately I'm not able to test it, but let me know if it works. Usage would be as follows:
function generateDropdown($array, $level = 1)
{
if ($level == 1)
{
$menu = '<select>';
}
foreach ($array as $a)
{
if (is_array($a))
{
$menu .= generateDropdown($a, $level+1);
}
else
{
$menu .= '<option>'.str_pad('',$level,'-').$a.'</option>'."\n";
}
}
if ($level == 1)
{
$menu = '</select>';
}
return $menu;
}
OK, I got it with the help of #jmgardhn2.
The data
This is my array:
$temp = array(
array(
'name' => 'fruits',
'sons' => array(
array(
'name' => 'green',
'sons' => array(
array(
'name' => 'mango'
),
array(
'name' => 'banana',
)
)
)
)
),
array(
'name' => 'cars',
'sons' => array(
array(
'name' => 'italy',
'sons' => array(
array(
'name' => 'ferrari',
'sons' => array(
array(
'name' => 'red'
),
array(
'name' => 'black'
),
)
),
array(
'name' => 'fiat',
)
)
),
array(
'name' => 'germany',
'sons' => array(
array(
'name' => 'bmw',
)
)
),
)
)
);
Recursive function
Now, the following function will provide an array with items like [level] => [name]:
function createSelect($tree, $items, $level)
{
foreach ($tree as $key)
{
if (is_array($key))
{
$items = createSelect($key, $items, $level + 1);
}
else
{
$items[] = array('level' => $level, 'text' => $key);
}
}
return $items;
}
Calling the funcion
Now, call the function as below:
$items = createSelect($temp, array(), 0);
Output
If you iterate the final $items array it will look like:
1fruits
2green
3mango
3banana
1cars
2italy
3ferrari
4red
4black
3fiat
2germany
3bmw