PHP arrays: extract one dimension

Question

I have an array that looks like:

$fields = array(
  "f1" => array("test"),
  "f2" => array("other" => "values")
);

I'd like to retrive this information in one array:

$first_dimension = array("f1","f2");

Is there a function in PHP that can extract a particular dimension of an array directly? Is there a syntax shortcut for this?

missing array in line 1 and ; in line 4

Imran
– Imran

2009-05-24 03:08:18 +00:00
Commented May 24, 2009 at 3:08 — Imran
– Imran, Commented May 24, 2009 at 3:08
I've updated the syntax Imran.

Wadih M.
– Wadih M.

2009-05-24 05:00:53 +00:00
Commented May 24, 2009 at 5:00 — Wadih M.
– Wadih M., Commented May 24, 2009 at 5:00

Community · Accepted Answer · 2023-11-14 22:25:35Z

6

Use array_keys().

$fields = array(
  'f1' => array('test'),
  'f2' => array('other' => 'values'),
);
$keys = array_keys($fields);

edited Nov 14, 2023 at 22:25

CommunityBot

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answered May 24, 2009 at 1:08

cletus

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2 Comments

Imran Over a year ago

missing array in line 1 and ; on line 4

Artem Russakovskii Over a year ago

Look through all other array_ functions - there are a lot of them and they do lots and lots of different things [and generally make your life a lot easier].

Ben Shelock · Accepted Answer · 2009-05-24 04:17:12Z

0

$fields['f2'][other']

To access it directly

answered May 24, 2009 at 4:17

Ben Shelock

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