CODEWITHSUNDEEP
phparrays
ehime
ehime

Reputation: 8405

PHP: Flattening 1 Dimensional array into a spaced string

After much search (and finding endless posts about multidims, but no single dims) I thought I'd ask this question.

I have an array

$arr = array('foo' => 'bar');

and am looking for an output of

$str = 'foo bar';

This MUST be a one liner, no recursive loops etc etc etc, I am thinking that its going to have to be a lambda of some sort or another. This array will NEVER have more than a single key and a single value though.

I think its going to end up looking something like

$arr = array('foo' => 'bar');
echo 'Authorization: '  . array_walk($arr, function ($v, $k) { echo "$k $v"; });

which unfortunately ends up as foo barAuthorization: 1

no idea where the 1 comes from =P

Upvotes: 1

Views: 71

Answers (3)

Mike Brant
Mike Brant

Reputation: 71414

This should be quite easy since the array was just initialized and the pointer resides at the beginning of the array:

echo 'Authorization: ' . key($arr) . ' ' . current($arr);

Of course if you have already read data from the array you would want to do a reset() before doing this to return the pointer to the beginning of the array.

Upvotes: 7

Popnoodles
Popnoodles

Reputation: 28419

"This array will NEVER have more than a single key and a single value though"

echo 'Authorization: '  .  array_shift(array_keys($arr)). ' ' . array_shift($arr) ;

Upvotes: -3

AmazingDreams
AmazingDreams

Reputation: 3204

PHP processes the function before it processes the string in front of it. Try replacing echo in your function with return. I think the 1 comes from the successfull processing of the array_walk function.

echo 'Authorization: '  . array_walk($arr, function ($v, $k) { return "$k $v"; });

UPDATE: Check out Example#1 http://php.net/manual/en/function.key.php

Upvotes: -1

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