How to increment the key in an Array - PHP?

Question

Let's say that I have the following array :

Array ( [0] => Jonny Cash [1] => Robert Smith )

How can I increment the array key in order to get something like this:

Array ( [1] => Jonny Cash [2] => Robert Smith )

Thanks in advance!

What are you trying to do that something like that would be necessary? The two arrays above are functionally identical. — SamA, Nov 05 '13 at 20:31
I'm trying to use the array key as an id later on to get a record from a DB. — dimlo, Nov 05 '13 at 20:33
The array_flip() method breaks if any of the elements are not unique. — Alex Howansky, Nov 05 '13 at 20:58

score 5 · Accepted Answer · answered Nov 05 '13 at 20:37

5

Push a null on to the front of the array and then delete it:

array_unshift($list, null);
unset($list[0]);

answered Nov 05 '13 at 20:37

Alex Howansky

Note: This doesn't work unless your keys are contiguous. I.e., you have to have 0,1,2 and not 0,1,3. – Alex Howansky Nov 05 '13 at 21:04

score 3 · Answer 2 · answered Nov 05 '13 at 20:37

3

If you just want to make an existing array have a 1-based index, just add a fake entry at 0 and remove it:

// Assuming $array = Array ( [0] => Jonny Cash [1] => Robert Smith );

array_unshift($array, "fake");
unset($array[0]);

answered Nov 05 '13 at 20:37

sbeliv01

score 0 · Answer 3 · answered Nov 05 '13 at 20:33

0

$array = array(1 => 'Jonny Cash', 2 => 'Robert Smith');
print_r($array);

Output:

Array ( [1] => Jonny Cash [2] => Robert Smith )

answered Nov 05 '13 at 20:33

Blazer

3 Answers3