PHP: set all values in an array to something

Question

Hi want to ask if there is a way to do this without foreach ($array as $k=>$v). I know it will work but I'm looking for a more elegant way if you know. So my array was like:

1 = 231
2 = 432
3 = 324

I flipped it and it became: 231 => 1, 432 =>2, 324 => 3. Now what I need to do is to set all values to '1'

Answer 1

You can use array_fill_keys:

$array = array(     1 => 231,     2 => 432,     3 => 324 );  $array = array_flip($array);  $array = array_fill_keys(array_keys($array), 1); 

Answer 2

array_fill_keys() should be what you need:

$keys = array_keys($yourArray); $filled = array_fill_keys($keys, 1); 

Answer 3

For PHP >5.3 you can use anonymous functions.

array_walk($array,function(&$value){$value=1;});

Note: value is passed by reference.

Answer 4

I believe you're looking for this function: array_fill()

From the above link:

"Fills an array with num entries of the value of the value parameter, keys starting at the start_index parameter."

Although if your indices are not numerical and/or are not enumerable (say, from 231 to 324 inclusive), then you may be better off with, as Rocket says, array_fill_keys() or your regular foreach.