Convert list (array) to associative array in PHP

Question

I want to convert a PHP list (array), i.e.

array("start", "end", "coords")

into an associative array with the right values (just to quickly check for the presence / absence of a key), that is, something like this:

array(
    "start" => 1,
    "end" => 1,
    "coords" => 1
)

Is there a more elegant way to do this than this?

array_fill_keys($ar, 1)

+3

arrays php associative-array

TMS 14 Mar '12 at 11:00

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2 answers

This feature is called array_flip

.

http://php.net/array_flip

Executing array_flip

in an array and then using isset

it turned out to be much faster than it was in_array

for me.

But note that this is only useful if you intend to search the array multiple times.

+1

skyronic 14 Mar 12 at 11:08

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TMS · Accepted Answer · 2012-03-20T23:23:50+0000

There is probably no more elegant solution than array_fill_keys($ar, 1)

.