how to add array value at specfic index in php codenighter - php

Question

I have array value like this
Array
(
[0] => Array
(
[channel] => 15
[id] => clsrnMdVKq2omEuQabSCHp83ezAX6w
)
[1] => Array
(
[channel] => 16
[id] => MfSoHUKjD5n90EZbstpiRGY7e8cgh2
)
[2] => Array
(
[channel] => 17
[id] => MfSoHUKjD5n90EZbstpiRGY7e8cgh2
)
)
Now i want to add another array value in specific index .lets say i wants to add this array value at index 1
[1] => Array
(
[channel] => 20
[id] => xxxxxxxxxxxewqeqwexxxxxxxewrewrw
)
Now the result output should be like this
Array
(
[0] => Array
(
[channel] => 15
[id] => clsrnMdVKq2omEuQabSCHp83ezAX6w
)
[1] => Array
(
[channel] => 20
[id] => xxxxxxxxxxxewqeqwexxxxxxxewrewrw
)
[2] => Array
(
[channel] => 16
[id] => MfSoHUKjD5n90EZbstpiRGY7e8cgh2
)
[3] => Array
(
[channel] => 17
[id] => MfSoHUKjD5n90EZbstpiRGY7e8cgh2
)
)
this is my foreach loop to serlize channel and id
foreach ($channel as $key => $ch) {
$user_hash['channel'] = json_encode($ch);
$user_hash['id'] = random_string('alnum', 30);
array_push($user_hash_array, $user_hash);
}

Answer 1

You need to split the array into 2, then insert your new value at the end of the first sub-array, then merge it with the second sub-array. EG: an array which looks like [1,3,4,5] and you want to insert "2" at position 2, then you split at position one to have [1] and [3,4,5]; then you append "2" at the end of first sub-array to form [1,2], then merge this new subarray with the other sub-array([3,4,5]) to form [1,2] + [3,4,5].
For your implementation, try this code:
$array = array() // the original array you want to modify
$insert = array() // the array you want to push into the original one above
$position = 1 // the position at which you want to insert the new item
$newArray = array_slice($array, 0, $position, TRUE) + $insert + array_slice($array, $position, NULL, TRUE);

Answer 2

you can use array_splice array method for add element in array at particular position
<?php
$original_array = array(
array("channel"=>15,"id"=>"sdfdfsf1"),
array("channel"=>16,"id"=>"sdfdfsf2"),
array("channel"=>17,"id"=>"sdfdfsf3")
);
echo "<pre>";print_r($original_array);
$inserted_element =
array(array("channel"=>20,"id"=>"xxxxxxxxxxewqeqwexxxxxxxewrewrw"));
$position=1;
array_splice( $original_array, $position, 0, $inserted_element );
echo "<pre>";print_r($original_array);
?>
Output will be as following
Array
(
[0] => Array
(
[channel] => 15
[id] => sdfdfsf1
)
[1] => Array
(
[channel] => 16
[id] => sdfdfsf2
)
[2] => Array
(
[channel] => 17
[id] => sdfdfsf3
)
)
Array
(
[0] => Array
(
[channel] => 15
[id] => sdfdfsf1
)
[1] => Array
(
[channel] => 20
[id] => xxxxxxxxxxewqeqwexxxxxxxewrewrw
)
[2] => Array
(
[channel] => 16
[id] => sdfdfsf2
)
[3] => Array
(
[channel] => 17
[id] => sdfdfsf3
)
)