How can I concatenate a key value if the id(key) value is the same as other id(key) value
PHP
$locations = Array(
[0] => Array(
"id" => 1,
"latitude" => "51.541561",
"longitude", => "84.215",
"content", => "The quick brown"
)
[1] => Array(
"id" => 1,
"latitude" => "51.541561",
"longitude", => "84.215",
"content", => "fox jumps over the lazy dog"
)
[2] => Array(
"id" => 3,
"latitude" => "12.541561",
"longitude", => "32.215",
"content", => "Another content"
)
)
And I want to make it like this:
$locations = Array(
[0] => Array(
"id" => 1,
"latitude" => "51.541561",
"longitude", => "84.215",
"content", => "The quick brown fox jumps over the lazy dog"
)
[2] => Array(
"id" => 3,
"latitude" => "12.541561",
"longitude", => "32.215",
"content", => "Another content"
)
)
Basically I want to concatenate the value in content(key) if the id(key) is the same with other id(key) value.
Any help would be greatly appreciated.
Try this -
$array = array();
foreach ($yourArray as $val) {
if (!array_key_exists($val['id'], $array)) {
$array[$val['id']] = $val;
} else {
$array[$val['id']]['content'] .= ' '.$val['content'];
}
}
hope this helps you :)
/**
* merge 2 arrays and return a new merged array. if same same key exists it will overwrite , unlike array_merge_recursive
* #param $a
* #param $b
* #return array|mixed
*/
public static function mergeArray($a,$b){
$args=func_get_args();
$res=array_shift($args);
while(!empty($args))
{
$next=array_shift($args);
foreach($next as $k => $v)
{
if(is_integer($k))
isset($res[$k]) ? $res[]=$v : $res[$k]=$v;
elseif(is_array($v) && isset($res[$k]) && is_array($res[$k]))
$res[$k]=self::mergeArray($res[$k],$v);
else
$res[$k]=. $v;
}
}
return $res;
}
Related
I need to perform iterated explosions on values in one column of my two dimensional array, then re-group the data to flip the relational presentation from "tag name -> video id" to "video id -> tag name".
Here is my input array:
$allTags = [
[
"name" => "TAG-ONE",
"video" => "64070,64076,64110,64111",
],
[
"name" => "TAG-TWO",
"video" => "64070,64076,64110,64111",
],
[
"name" => "TAG-THREE",
"video" => "64111",
]
];
I want to isolate unique video ids and consolidate all tag names (as comma-separayed values) that relate to each video id.
Expected output:
$allTagsResult = [
[
"name" => "TAG-ONE,TAG-TWO",
"video" => "64070",
],
[
"name" => "TAG-ONE,TAG-TWO",
"video" => "64076",
],
[
"name" => "TAG-ONE,TAG-TWO",
"video" => "64110",
],
[
"name" => "TAG-ONE,TAG-TWO,TAG-THREE",
"video" => "64111",
],
];
Somehow I did it by checking the value using nested loops but I wish to know if you guys can suggest any shortest method to get the expected output.
If you want to completely remove foreach() loops, then using array_map(), array_walk_recursive(), array_fill_keys() etc. can do the job. Although I think that a more straightforward answer using foreach() would probably be faster, but anyway...
$out1 = array_map(function ($data) {
return array_fill_keys(explode(",", $data['video']), $data['name']); },
$allTags);
$out2 = [];
array_walk_recursive( $out1, function ( $data, $key ) use (&$out2) {
if ( isset($out2[$key])) {
$out2[$key]['name'] .= ",".$data;
}
else {
$out2[$key] = [ 'name' => $data, 'video' => $key ];
}
} );
print_r($out2);
will give...
Array
(
[64070] => Array
(
[name] => TAG-ONE,TAG-TWO
[video] => 64070
)
[64076] => Array
(
[name] => TAG-ONE,TAG-TWO
[video] => 64076
)
[64110] => Array
(
[name] => TAG-ONE,TAG-TWO
[video] => 64110
)
[64111] => Array
(
[name] => TAG-ONE,TAG-TWO,TAG-THREE
[video] => 64111
)
)
if you want to remove the keys, then
print_r(array_values($out2));
The code could be compressed by piling all of the code onto single lines, but readability is more useful sometimes.
Another method if you don't like looping:
$video_ids = array_flip(array_unique(explode(",",implode(",",array_column($allTags,'video')))));
$result = array_map(function($id){
return ['name' => '','video' => $id];
},array_flip($video_ids));
array_walk($allTags,function($tag_data) use (&$result,&$video_ids){
$ids = explode(",",$tag_data['video']);
foreach($ids as $id) $result[$video_ids[$id]]['name'] = empty($result[$video_ids[$id]]['name']) ? $tag_data['name'] : $result[$video_ids[$id]]['name'] . "," . $tag_data['name'];
});
Demo: https://3v4l.org/vlIks
Below is one way of doing it.
$allTags = [
'0' => [
"name" => "TAG-ONE",
"video" => "64070,64076,64110,64111",
],
'1' => [
"name" => "TAG-TWO",
"video" => "64070,64076,64110,64111",
],
'2' => [
"name" => "TAG-THREE",
"video" => "64111",
]
];
$allTagsResult = array();
$format = array();
foreach( $allTags as $a ) {
$name = $a['name'];
$videos = explode(',', $a['video']);
foreach( $videos as $v ) {
if( !isset( $format[$v]) ) {
$format[$v] = array();
}
$format[$v][] = $name;
}
}
foreach( $format as $video => $names) {
$allTagsResult[] = array('name' => implode(',', $names), 'video' => $video);
}
echo '<pre>';
print_r($allTagsResult);
die;
You can check Demo
I am typically in favor of functional style coding, but for this task I feel it only serves to make the script harder to read and maintain.
Use nested loops and explode the video strings, then group by those video ids and concatenate name strings within each group. When finished iterating, re-index the array.
Code: (Demo)
$result = [];
foreach ($allTags as $tags) {
foreach (explode(',', $tags['video']) as $id) {
if (!isset($result[$id])) {
$result[$id] = ['video' => $id, 'name' => $tags['name']];
} else {
$result[$id]['name'] .= ",{$tags['name']}";
}
}
}
var_export(array_values($result));
Output:
array (
0 =>
array (
'video' => '64070',
'name' => 'TAG-ONE,TAG-TWO',
),
1 =>
array (
'video' => '64076',
'name' => 'TAG-ONE,TAG-TWO',
),
2 =>
array (
'video' => '64110',
'name' => 'TAG-ONE,TAG-TWO',
),
3 =>
array (
'video' => '64111',
'name' => 'TAG-ONE,TAG-TWO,TAG-THREE',
),
)
I got a recursive function which currently echo the results. I want this function to return results and loop them with foreach inside markup.
I understand that i should use some kind of iteration for each array to get my desired result but have failed with that. Currently my code look like this(with attempts to iterate):
public static function recursiveChildCategory($categories = array(), $depth = 0, $i = 0) {
$ca = [];
// Loop through categories
foreach($categories as $key => $category){
echo str_repeat(" ", $depth);
echo "<a href='".implode('/', $category['breadcrumb'])."'>{$category['title']}</a>";
echo '<br>';
$ca[$i] = [
'id' => $category['id'],
'title' => $category['title'],
];
if(isset($category['child'])) {
// Loop
self::recursiveChildCategory($category['child'], $depth + 1, $i++);
}
}
return $ca;
}
And incoming array to the function:
Array (
[0] => Array (
[id] => 7
[title] => Deserts
[slug] => deserts
[child] => Array (
[0] => Array (
[id] => 8
[title] => Space
[slug] => space
[child] => Array (
[0] => Array (
[id] =>
[title] =>
[slug] =>
[child] => Array ( )
)
)
)
)
)
)
Currently it just returns first level of child categories "Deserts", but nothing about "Space".
As desired result i want function to return all categories with $depth and infinite path to multiple child categoires (to do the same work as currently echo doing).
Thanks in advice
Try this and tell me if it's what you are looking for :
The array for my test :
$array = [
0 => [
"id" => 7,
"title" => "Deserts",
"slug" => "deserts",
"child" => [
0 => [
"id" => 8,
"title" => "Space",
"slug" => "space",
"child" => [
0 => [
"id" => 9,
"title" => "Test",
"slug" => "test"
]
]
]
]
]
];
The recursive function :
function recursiveChildCategory($categories, $depth = 0, $ca = []) {
// Loop through categories
foreach($categories as $key => $category){
$ca[$depth] = [
'id' => $category['id'],
'title' => $category['title'],
];
if(isset($category['child'])) {
// Loop
$ca = recursiveChildCategory($category['child'], $depth + 1, $ca);
} else {
break;
}
}
return $ca;
}
Now, how to use it :
$test = recursiveChildCategory($array);
var_dump($test);
And this is the output :
array(3) {
[0]=>
array(2) {
["id"]=>
int(7)
["title"]=>
string(7) "Deserts"
}
[1]=>
array(2) {
["id"]=>
int(8)
["title"]=>
string(5) "Space"
}
[2]=>
array(2) {
["id"]=>
int(9)
["title"]=>
string(4) "Test"
}
}
Here is a link to test it : http://sandbox.onlinephpfunctions.com/
EDIT : I made some modification because in OP example array can have multiple result in first "depth", here is the "new" solution :
The array for test :
$array = [
"0" =>
[ "id" => 3, "title" => "Subcat", "slug" => "subcat", "child" =>
[ "0" =>
[ "id" => 5, "title" => "Subsubcat2", "slug" => "subcat2", "child" =>
[ "0" =>
[ "id" => "", "title" => "", "slug" =>"", "breadcrumb" => [ "0" => "homeworld", "1" => "cat", "2" => "subcat", "3" => "subcat2" ], "child" => [ ] ]
]
]
]
],
"1" =>
[ "id" => 4, "title" => "Kalahari", "slug" => "kalahari", "child" =>
[ "0" => [ "id" => 7, "title" => "deserts", "slug" => "deserts", "child" =>
[ "0" =>
[ "id" => 8, "title" => "Ural", "slug" => "ural", "child" =>
[ "0" => [ "id" =>"", "title" =>"", "slug" =>"", "child" => [ ] ] ]
]
]
]
]
]
];
The function : I just add $ca[$depth][] instead of $ca[$depth]
function recursiveChildCategory($categories, $depth = 0, $ca = []) {
// Loop through categories
foreach($categories as $key => $category){
$ca[$depth][] = [
'id' => $category['id'],
'title' => $category['title'],
];
if(isset($category['child'])) {
// Loop
$ca = recursiveChildCategory($category['child'], $depth + 1, $ca);
} else {
break;
}
}
return $ca;
}
And now the result :
$test = recursiveChildCategory($array);
foreach ($test as $depth => $c) {
echo "depth : ".$depth."\n";
foreach ($c as $result) {
echo "Title : ".$result['title']."\n";
}
echo "=============\n";
}
The output is :
depth : 0
Title : Subcat
Title : Kalahari
=============
depth : 1
Title : Subsubcat2
Title : deserts
=============
depth : 2
Title :
Title : Ural
=============
depth : 3
Title :
=============
Test here : link
Array
(
[0] => Array
(
[what] => b4
[map] => 74,76,77,83
)
[1] => Array
(
[what] => b2
[map] => 53,82
)
[2] => Array
(
[what] => b1
[map] => 36
)
)
abc('b4');
function abc($what){
$map = // element `map` where `what` = $what;
}
So I need to get map where what is equal to $what;
For example - if $what is b4 result should be 74,76,77,83; and so on.
How can I do this?
If you are going to access the data on a regular basis and the what is unique, then use array_column() with the third parameter as the column to use as the key. Then your array is easily access with what and no loops are harmed in this answer...
$array = Array
(
Array
(
"what" => "b4",
"map" => "74,76,77,83"
),
Array
(
"what" => "b2",
"map" => "53,82"
),
Array
(
"what" => "b1",
"map" => "36"
)
);
$array = array_column($array, null, "what");
echo $array['b4']['map'];
gives...
74,76,77,83
With array_search() and array_column() you can get the matching $map in one line:
<?php
$array = Array
(
Array
(
"what" => "b4",
"map" => "74,76,77,83"
),
Array
(
"what" => "b2",
"map" => "53,82"
),
Array
(
"what" => "b1",
"map" => "36"
)
);
function abc($array, $what) {
return $array[array_search($what, array_column($array, 'what'))]['map'];
}
echo abc($array, "b4");
The function de-constructed and explained:
function abc($array /* the complete input array */, $what /* the search string */) {
// get the key of the sub-array that has $what in column 'what':
$key = array_search($what, array_column($array, 'what'));
// use that key to get 'map' on index $key
return $array[$key]['map'];
}
A working fiddle can be found here: https://3v4l.org/0NpcX
I think "walking" through an array is easy to read and understand:
<?php
$map = [
[
'what' => "b4",
'map' => "74,76,77,83"
],
[
'what' => "b2",
'map' => "53,82"
],
[
'what' => "b1",
'map' => "36"
]
];
function lookupWhatInMap(&$map, $what) {
array_walk($map, function($entry, $key) use ($what) {
if ($entry['what'] == $what) {
print_r($entry['map']);
}
});
}
lookupWhatInMap($map, "b4");
All you have to do is loop through your map and compare values.
function abc($what){
$map = [...];
foreach($map as $item) {
if (isset($item[$what]) ) {
return $item["map"];
}
}
return false;
}
If you just want 1 value from the array, you could use a foreach and a return statement where there is a match:
$a = [
[
"what" => "b4",
"map" => "74,76,77,83"
],
[
"what" => "b2",
"map" => "53,82"
],
[
"what" => "b1",
"map" => "36"
]
];
function abc($what, $arrays)
{
foreach ($arrays as $array) {
if ($array['what'] === $what) {
return $array['map'];
}
}
return false;
}
echo(abc('b4', $a)); // 74,76,77,83
Demo
https://ideone.com/V9WNNx
$arr[] = [
'what' => 'b4',
'map' => '74,76,77,83'
];
$arr[] = [
'what' => 'b2',
'map' => '53,82'
];
$arr[] = [
'what' => 'b1',
'map' => '36'
];
echo abc('b4', $arr);
function abc($what, $arr){
$map = null;
$idx = array_search($what, array_column($arr, 'what'));
if ($idx !== false) {
$map = $arr[$idx]['map'];
}
return $map;
}
For example a multidimensional array like an example below
$arr = array(
[H1] => array(
"name" => "A"
"title" => "T1"
)
[H2] => array(
"name" => "B"
"title" => "B1"
)
)
Let's say I would like to search name which equals to A in $arr and if it's matched, the searching should return the key which is H1
How can I do that in php ?
I tried array_keys($arr, "A") but it returns me with an array instead of the key.
This may help -
$arr = array(
'H1' => array(
"name" => "A",
"title" => "T1",
),
'H2' => array(
"name" => "B",
"title" => "B1",
)
);
// Generate a new array with 'keys' and values in 'name'
$new = array_combine(array_keys($arr), array_column($arr, 'name'));
// Search in that new array
$search = array_search('A', $new);
var_dump($search);
Output
string(2) "H1"
Demo
Another simple way would be -
$serach= false;
foreach($arr as $key => $val) {
if($val['name'] == 'A') {
$search= $key;
break;
}
}
var_dump($search);
Suppose i have a array like this :
Array(
'1' => Array(
"ID" => 1,
"Name" => "name 1"
),
'2' => Array (
Array(
"ID" => 2,
"Name" => "name 2"
)
),
'3' => Array(
Array(
Array(
Array(
"ID" => 3,
"Name" => "name3"
)
)
),
'4' => Array (
Array {
"ID" => 4,
"Name" => "name 4"
),
Array(
"ID" => 5,
"Name" => "name 5"
),
Array(
"ID" => 6,
"Name" => "name 6"
)
);
number of sub-arrays is not ordered it may be 3, 4 or 5 etc...
and i wanted to get :
Array(
Array( "ID" => 1, "Name" => "name 1"),
Array( "ID" => 2, "Name" => "name 2"),
Array( "ID" => 3, "Name" => "name 3"),
Array( "ID" => 4, "Name" => "name 4"),
Array( "ID" => 5, "Name" => "name 5"),
Array( "ID" => 6, "Name" => "name 6"));
Is there an easy way to do this ?
EDIT :
Edited the above array to add :
'4' => Array (
Array {
"ID" => 4,
"Name" => "name 4"
),
Array(
"ID" => 5,
"Name" => "name 5"
),
Array(
"ID" => 6,
"Name" => "name 6"
)
);
which aren't nested but i still want them to be in my final array.
Thanks.
//Assuming your data is in $in
$out=array();
foreach($in as $k=>$v) {
while ((is_array($v)) && (isset($v[0]))) $v=$v[0];
//See below for next line
$out[]=$v;
}
print_r($out);
With the marked line being either $out[$k]=$v; or $out[]=$v; depending on wether you want to keep the 1st-level keys. In your desired output you do not ,so use the shown version
Edit
With you changed input array, you need to do something like
function addtoarray($inarray, &$outarray) {
foreach ($inarray as $i) {
if (!is_array($i)) continue;
if (isset($i['ID'])) $outarray[]=$i;
else addtoarray($i,$outarray);
}
}
$out=array();
addtoarray($in,$out);
print_r($out);
This was tested against your new input data
You could recurse through the array and check for the ID field.
function combine_array(array $src, array &$dest)
{
if( isset( $src['ID'] ) ) {
$dest[] = $src;
return;
}
foreach( $sub in $src ) {
combine_array( $sub, $dest );
}
}
Just wrote this off the top of my head, no testing, so it might have a few problems. But that's the basic idea.
This may work for you, assuming $array is the variable and php 5.3
//process
$array = array_map(function($block) {
$return = '';
foreach ($block as $sub) {
if (true === isset($sub['ID']) {
$return = $block;
break;
}
}
return $block;
}, $array);
array_filter($array); //remove empty elements
Wrote up a quick recursive function. You'll need to write any appropriate error handling and check the logic, since a discrepancy in your data could easily turn this into an infinite loop:
$output = array();
foreach ( $data as $d ) {
$output[] = loop_data( $d );
}
function loop_data( $data ) {
// Check if this is the right array
if( ! array_key_exists( "ID", $data ) ) {
// Go deeper
$data = loop_data( $data[0] );
}
return $data;
}