PHP: Modify an associative array based on value of a key - php

Question

I have an array like this
Array
(
[id] => 3
[type] => default
[place] => 1
)
Array
(
[id] => 3
[type] => default
[place] => 2
)
Array
(
[id] => 3
[type] => default
[place] => 3
)
This array is created from this php
for($count=1;$count <= 3;$count++){
$places_array = array(
"id" => "3",
"type" => "default",
"place" => $count,
);
}
Now I want to change the result of this array if the place is found by the php mysql data. For example I have this array.
Array
(
[id] => 7
[type] => 1
[place] => 2
[description] => This is item place 2
[image] => this_is_the_image.png
)
As you can see that the second array is in "place 2". Now I want the result be like this
Array
(
[id] => 3
[type] => default
[place] => 1
)
Array
(
[id] => 7
[type] => 1
[place] => 2
[description] => This is item place 2
[image] => this_is_the_image.png
)
Array
(
[id] => 3
[type] => default
[place] => 3
)
How to achieve this? I have already done with array_search function but no luck.
anyone please help me
=======================EDIT FULL CODE================================
Here is the code, I'm showing the data from database and call it in while loop function
for($count=1;$count <= $max_places;$count++){
$array[] = array(
"id" => $res['id'],
"type" => "default",
"place" => $count
);
while($arr = $stmts->fetch()){
$key = array_search($arr['place'], array_column($array, 'place'));
if($key && array_key_exists($key, $array)) {
$array[$key] = [
"id" => $arr['id'],
"type" => $arr['type'],
"place" => $arr['place'],
"url" => $arr['url'],
"image" => $arr['image']
];
}
}
}
=========================SWAPPED CODE==============================
while($arr = $stmts->fetch()){
$array[] = [
"id" => $arr['id'],
"type" => $arr['type'],
"place" => $arr['place'],
"url" => $arr['url'],
"image" => $arr['image']
];
for($count=1;$count <= $max_places;$count++){
$key = array_search($arr['place'], array_column($array, 'place'));
if($key && array_key_exists($key, $array)) {
$array[] = array(
"id" => $res['id'],
"type" => "default",
"place" => $count
);
}
}
}

Answer 1

You can use the built in
array_multisort()
function.
Example copied from php.net
A nice way to do sorting of a key on a multi-dimensional array without having to know what keys you have in the array first:
<?php
$people = array(
array("name"=>"Bob","age"=>8,"colour"=>"red"),
array("name"=>"Greg","age"=>12,"colour"=>"blue"),
array("name"=>"Andy","age"=>5,"colour"=>"purple")
);
var_dump($people);
$sortArray = array();
foreach($people as $person){
foreach($person as $key=>$value){
if(!isset($sortArray[$key])){
$sortArray[$key] = array();
}
$sortArray[$key][] = $value;
}
}
$orderby = "name"; //change this to whatever key you want from the array
array_multisort($sortArray[$orderby],SORT_DESC,$people);
var_dump($people);
?>
There's no checking on whether your array keys exist, or the array data you are searching on is actually there, but easy enough to add.
Check out https://www.php.net/manual/de/function.ksort.php (user contributes) and
https://www.php.net/manual/de/function.array-multisort.php

Answer 2

Use array_column() with array_search() to get the array key that needs to be modified. See the following code snippet:
<?php
// Here is trick; get the key of the array using array_column
$key = array_search('2', array_column($array, 'place'));
// If any key found modify the array
if ($key && array_key_exists($key, $array)) {
$array[$key] = [
'id' => 7,
'type' => 1,
'place' => 2,
'description' => 'This is item place 2',
'image' => 'this_is_the_image.png',
];
}
print_r($array);
See the demo

Answer 3

Try :
for($count=1;$count <= 3;$count++){
if(array_search($count,array_column("place",$array_from_db)) continue;
$places_array = array(
"id" => "3",
"type" => "default",
"place" => $count,
);
}
This will skip:
Array
(
[id] => 3
[type] => default
[place] => 2
)
=========== EDIT =============
while($arr = $stmts->fetch())
{
$array[$arr['place']] = [
"id" => $arr['id'],
"type" => $arr['type'],
"place" => $arr['place'],
"url" => $arr['url'],
"image" => $arr['image']
];
}
for($count=1;$count <= $max_places;$count++){
if(!isset($array[$count])){
$array[$count] = array(
"id" => $res['id'],
"type" => "default",
"place" => $count
);
}
}
ksort($array);

Answer 4

Found the answer, thanks for all help.
Here is the trick
first we need to determine the main array like this
for($count=1;$count <= $max_places;$count++){
$array[$count] = array(
"id" => $res['id'],
"type" => "default",
"place" => $count
);
}
Then we need to find which place is not available and show the matches.
while($arr = $stmts->fetch()){
$key = array_search($arr['place'], array_column($array, 'place'));
$key+=1;
if($key && array_key_exists($key, $array)) {
$array[$arr['place']] = [
"id" => $arr['id'],
"type" => $res['type'],
"place" => $arr['place'],
"url" => $arr['url'],
"image" => $arr['image']
];
}
}
The trick is in the
$key+=1;
Because the default key in array is 0.
Hope this can help others