how to prepend values in array?

tito

Hello,

I have this array

Array
(
    [0] => 353
    [1] => 356
    [2] => 357
    [3] => 359
    [4] => 360
    [5] => 361
)

How can I add a value to it? The same so it remains an array and becomes

Array
(
[0] => a_353
[1] => a_356
[2] => a_357
[3] => a_359
[4] => a_360
[5] => a_361
)

Thank you.

laserlight

I do not see a difference in your before and after example, but one way to prepend elements is to use [man]array_unshift/man.

tito

array_unshift appears to prepend only the first element.

The difference after is the addition of "a_"

tito

$allart2 = array_unshift($allarts,'h_');

messes it up

(
    [0] => h_
    [1] => 352
    [2] => 353
    [3] => 354
    [4] => 355
    [5] => 356
    [6] => 357
    [7] => 358
    [8] => 359
    [9] => 360
    [10] => 361
)

laserlight

Oh, you confused me. You do not want to prepend to an array, but to the elements of an array.

The simple way is with a loop:

foreach ($array as $key => $value) {
    $array[$key] = 'a_' . $value;
}

tito

Thanks. You just saved me some time. I was looking into the more complicated array_walk

laserlight

Thanks. You just saved me some time. I was looking into the more complicated array_walk

No worries. Remember to mark this thread as resolved (if it is) using the thread tools.

Incidentally, the array_walk() solution is:

array_walk($array,
           create_function('&$value,$key,$prepend', '$value=$prepend.$value;'),
           'h_');