duanlujiaji10335 2013-02-21 01:29
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PHP:将1维数组扁平化为间隔开的字符串

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

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  • dongzhan2461 2013-02-21 01:36
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    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.

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