How to the values of an array to populate the keys of another array?

Question

I have an array of field names. I would like to use those to populate the keys of another array, which will have empty values as default. Is there a single command I can do this with?

Gordon · Accepted Answer · 2010-04-23 15:31:24Z

2

As of PHP 5.2.0 you can also use array_fill_keys

array_fill_keys( array('foo', 'bar', 'baz'), NULL);

which will give

Array
(
    [foo] => 
    [bar] => 
    [baz] => 
)

edited Apr 23, 2010 at 15:31

answered Apr 23, 2010 at 15:24

Gordon

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Gumbo · Accepted Answer · 2010-04-23 15:26:22Z

2

Try the array_combine and array_fill functions:

array_combine($arrayOfKeys, array_fill(0, count($arrayOfKeys), null))

Or, as array_fill is only available since PHP 4.2, try array_pad instead:

array_combine($arrayOfKeys, array_pad(array(), count($arrayOfKeys), null))

edited Apr 23, 2010 at 15:26

answered Apr 23, 2010 at 15:20

Gumbo

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2 Comments

Gordon Over a year ago

only available since PHP 4.2 - Released: 22 April 2002 de3.php.net/releases ;)

Gumbo Over a year ago

@Gordon: It’s sad, but there are servers out there that still have a lower PHP version running.

Matteo Riva · Accepted Answer · 2010-04-23 15:21:00Z

1

If I understand your question, you need array_combine()

answered Apr 23, 2010 at 15:21

Matteo Riva

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