Php array delete in reverse [duplicate]

Question

I need to delete the values inside the array that are before the given variable and store in the same key, thanks in advance.

$filter = 8;

Array
(
    [1] => 
    [2] => 
    [3] => 
    [4] => 
    [5] => 
    [6] => 
    [7] => 
    [8] => 
    [9] => 
    [10] => 
    [11] => 
    [13] => PHM
    [14] => PHN
    [15] => N
    [17] => M9
    [18] =>

)

My output should be,

Array(
    [8] => 
    [9] => 
    [10] => 
    [11] => 
    [13] => PHM
    [14] => PHN
    [15] => N
    [17] => M9
    [18] =>
)

tried but keys are going different. Array ( [0] => [1] => [2] => [3] => PHM [4] => PHN [5] => N [6] => M9 ) — Crysis
– Crysis, Commented Jun 16, 2016 at 12:34
Your array starts with 1 and not 0, so you have to set the argument to true to keep the index, so: print_r(array_slice($table_list, $filter, NULL, TRUE)); — Rizier123
– Rizier123, Commented Jun 16, 2016 at 12:45

Rizier123 · Accepted Answer · 2016-06-16 12:48:40Z

7

You can use array_slice() to do this. Now since you don't have a 0-based enumerated array, you have to make sure to set the preserve_keys parameter to true:

print_r(array_slice($table_list, $filter, NULL, TRUE));

answered Jun 16, 2016 at 12:48

Rizier123

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Andreas · Accepted Answer · 2016-06-16 12:51:27Z

2

$arr = array("","","","","","","","","","","","","","PHM","PHN","N","","M9","");
$filter = 8;
For($i=0;$i<$filter;$i++){
    If(isset($arr[$i])) unset($arr[$i]);
}

Var_dump($arr);

I created an array with all indexes, for this example, but it will work even if 0 and 12 is missing because of isset().

https://3v4l.org/WKMGO

Edited to keep key 8.

edited Jun 16, 2016 at 12:51

answered Jun 16, 2016 at 12:46

Andreas

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