How to remove multiple columns from the multi dimensional array? [duplicate] - php

Question

This question already has answers here:
Remove unwanted elements from subarrays in multidimensional array
(3 answers)
Closed 6 months ago.
I have a multi dimensional array like below.
array:1 [
0 => array:3 [
"picture_id" => "0"
"car_name" => "CA"
"from" => "2020"
"to" => "2020"
]
]
I need to remove from & to from the above array and return result in same structure.
I have tried following code
$whitelist = array("from", "to");
$finalArray = [];
foreach ($records as $record) {
foreach ($record as $key => $item) {
if (!in_array($key, $whitelist)) {
$finalArray[$key] = $item;
}
}
}
But the result I am getting is not multi-dimensional array like this:
array:1 [
"picture_id" => "0"
"car_name" => "CA"
]
My expected result is:
array:1 [
0 => array:3 [
"picture_id" => "0"
"car_name" => "CA"
]
]

Answer 1

You can try something like this:
$array = [
[
"picture_id" => "0",
"car_name" => "CA",
"from" => "2018",
"to" => "2020"
],
[
"picture_id" => "1",
"car_name" => "WA",
"from" => "2010",
"to" => "2019"
]
];
$whitelist = array("from", "to");
$finalArray = [];
foreach ($array as $k => $record) {
foreach ($record as $key => $item) {
if (!in_array($key, $whitelist)) {
$finalArray[$k][$key] = $item;
}
}
}
print("<pre>".print_r($finalArray,true)."</pre>");
What will print out:
Array
(
[0] => Array
(
[picture_id] => 0
[car_name] => CA
)
[1] => Array
(
[picture_id] => 1
[car_name] => WA
)
)
A short explanation...Basically you are looping over multi dimensional array as
foreach($array as $key => $value)
Where value is "inner" array, so in order to remove some elements from inner, and create a new multi dimensionalarray, you have to use keys, like in my example, from original array. So you than actually make an array like:
$newArray[$key] = $innerArray
And this gives you multi dimensional array.
BR

Answer 2

Rather than having to go through each field to determine if it should be removed, you can use array_diff_key() to remove all of the columns in one go. This needs you to create a list of the fields you want to remove and for each record just get the difference between the record and the keys to remove...
// Keys to remove (note as key rather than value)
$remove = ["from" => 1, "to" => 1];
$finalArray = [];
foreach ($array as $record) {
$finalArray[] = array_diff_key($record, $remove);
}
print_r($finalArray);

Answer 3

Try This
$result = [];
foreach($yourArray as $key => $value){
unset($value['from']);
unset($value['to']); //You can unset as many columns as you want specifically.
$result[] = $value;
}
print_r($result);