Use array value while declaring an array in PHP

Question

I was wondering...is it possible to use a value from an array which is currently being declared? Something like:

$a = array(
    'foo' => 'value',
    'bar' => $a['foo']
);

This is only a simple example. It would be pretty useful doing this, since it frees you from doing extra manipulation after the array declaration.

berty · Accepted Answer · 2012-02-08 22:24:03Z

4

No, you can't, but you can do something like :

$a = array(
    'foo' => ($val = 'value'),
    'bar' => $val
);

answered Feb 8, 2012 at 22:24

berty

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1 Comment

linkyndy Over a year ago

An interesting approach. Although you use an extra variable, you at least don't have to manipulate the array after. Seems to be the best approach possible in this situation.

Halcyon · Accepted Answer · 2012-02-08 22:24:27Z

1

No. $a['foo'] will only be available after the assignment completes entirely.

answered Feb 8, 2012 at 22:24

Halcyon

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