Change indexing of array in php

arrays, php

Solution

If you want to declare an array that way you should do:

$array = array(100 => 'a', 200 => 'b', 300 => 'c', 400 => 'd', 500 => 'e');

Note that if you add a new element to the `$array` in the shorter way (`$array[] = 'f'`) the key assigned will be `501`.

If you want to convert regular array indexes to hundreds-based ones you can do this:

$temp = array();
foreach ($array as $key => $value) {
    $temp[(($key + 1) * 100)] = $value;
}
$array = $temp;

But perhaps you don't really need to convert no array and instead access your current one this way:

$i = $hundredBasedIndex / 100 - 1;
echo $array[$i];
// or directly
echo $array[($hundredBasedIndex / 100 - 1)];

Problem

I want to change the indexing of array for example. I have an array ``` $a = array("a","e","i","o","u"); echo $a[0]; //output a ``` It means this array has index (0,1,2,3,4) Now I want to start my array from index 100 instead 0 Means array with index (100,200,300,400,500)

Original source