Mrthdrb

I have an array and I want to delete previous all elements from the current specified index

For example:

$array = [0 => "a", 1 => "b", 2 => "c", 3=>"d", 4=>"e"];

I have an index like 3, so I want to delete previous all like

0 => "a", 1 => "b", 2 => "c"

and only have

3=>"d", 4=>"e"

in my new array.
Can anyone help me?

$array = [0 => "a", 1 => "b", 2 => "c", 3=>"d", 4=>"e"];
$output = array_slice($array, 3);

output:

array(2) 
 [0]=> string(1) "d"
 [1]=> string(1) "e"

Another solution with saving index

$array = [0 => "a", 1 => "b", 2 => "c", 3=>"d", 4=>"e"];
$output = array_slice($array, 3, null, true);

output:

array(2) 
 [3]=> string(1) "d"
 [4]=> string(1) "e"

https://www.php.net/manual/en/function.array-slice.php

You may to use array_slice()

In example :

<?php
$array = [0 => "a", 1 => "b", 2 => "c", 3=>"d", 4=>"e"];

$startingPosition = 3;

// Preserve keys
// |
// Your array Delete from Delete to |
// | | (if null, |
// | | to the end) |
// | | | |
// v v v v
$array = array_slice($array, $startingPosition , null, true);

var_dump($array);

Output :

array(2) 
 [3]=>
 string(1) "d"
 [4]=>
 string(1) "e"

You can also use unset() to remove the elements. As shown below.

<?php

$array = [0 => "a", 1 => "b", 2 => "c", 3=>"d", 4=>"e"];
$index = 3;

for($i = 0; $i<$index; $i++) 
 unset($array[$i]); 

echo "<pre>";print_r($array);

?>

You can use veriation of array-slice and so on (as array_slice($array, 3) ) but also simple for loop:

$array = [0 => "a", 1 => "b", 2 => "c", 3=>"d", 4=>"e"];
$copy = false;
foreach($array as $k => $v) = ($k == 3);
 if ($copy)
 $res[$k] = $v;

Try this

<?php

 $array = [0 => "a", 1 => "b", 2 => "c", 3=>"d", 4=>"e"];

 $new_array = array_slice($array, 3); // 3 is your key to slice

 print_r($new_array);

?>

You can use array_slice:

$array = [0 => "a", 1 => "b", 2 => "c", 3=>"d", 4=>"e"];
$newArray = array_slice($array, 3, NULL, TRUE);
echo '<pre>';
print_r($newArray);
echo '</pre>';

Output:

Array
(
 [3] => d
 [4] => e
)

Note that 4 th parameter: TRUE -> preserve_keys is very important.

If it is set to true, preserves the keys in the output array.

Your new array will now have all elements only after index 3

All elements before 3 are not returned here.