Remove certain indexes from 2d array PHP - php

Question

I have an array like this:
Array
(
[0] => Array
(
[0] => 1
[1] => Firstname one
[2] => Lastname one
)
[1] => Array
(
[0] => 2
[1] => Firstname two
[2] => Lastname two
)
[2] => Array
(
[0] => 3
[1] => Firstname three
[2] => Lastname three
)
)
Now, I would like to remove the entire index 1, i.e., all the firstname's from the array. I was planning on using array_splice by looping through the entire array and removing its index 1. But is there a better way. (I want the re-indexing after deletion of elements.)

Answer 1

$yourarray = array_map(function($el) {
unset($el[1]); //remove index 1
return array_values($el); //return and reindex
}, $yourarray);

Answer 2

You can also use array_slice function like
foreach($array as $k=>$v)
{
array_splice($v, 1,1);
$array[$k] = $v;
}
OUTPUT :
Array
(
[0] => Array
(
[0] => 1
[1] => Lastname one
)
[1] => Array
(
[0] => 1
[1] => Lastname two
)
[2] => Array
(
[0] => 1
[1] => Lastname three
)
)

Answer 3

You should use array_map
$input_array = [[1,'Firstname one','Lastname one'],
[2,'Firstname two','Lastname two'],
[3,'Firstname three','Lastname three']];
$resultArray = array_map(function($record) {
return [$record[0], $record[2]]; // add your desired records
}, $input_array);
echo '<pre>'; print_r($resultArray);
output:-
Array
(
[0] => Array
(
[0] => 1
[1] => Lastname one
)
[1] => Array
(
[0] => 2
[1] => Lastname two
)
[2] => Array
(
[0] => 3
[1] => Lastname three
)
)

Answer 4

foreach($array as $k=>$v)
{
unset($array[$k][1]); /// Chnage the key of array which you want to remove
}