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Get value from associative array without key...

Posted on 2010-11-30
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Last Modified: 2012-05-10
Given an array like this, where I don't know the key name, how can I extract the value of both elements (AL, Alabama)?

Array
(
    [abbreviation] => AL
    [full_name] => Alabama
)



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Question by:interclubs
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5 Comments
 
LVL 11

Expert Comment

by:Bruce Smith
ID: 34241258
you cannot unless you know the array variable's name in which case you would extract the values like $name['abbreviation']['full_name'];
0
 
LVL 14

Expert Comment

by:Scott Madeira
ID: 34241613
If you mean that you don't know the key names (abbreviation, full_name) you can do something like this:

foreach ($array_name as $value){

     $x[] = $value;
}

That would give you an array of two elements in your example where $x[0] = 'AL' and $x[1] = 'Alabama'.

If you don't know the name of the actual array ($array_name) in my example, I have no idea how you would find the values.
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LVL 1

Accepted Solution

by:
jebpotly earned 500 total points
ID: 34241967
array_keys will give you a list of the keys in an array.

If you have:

$my_array = array('abbreviation' => 'AL', 'full_name' => 'Alabama');

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then you could use array_keys:
$my_keys = array_keys($my_array);

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which would give you an array of Array ( [0] => abbreviation [1] => full_name ). You could then do
$first_value = $my_array[$my_keys[0]];
$second_value = $my_array[$my_keys[0]];

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Or you could convert the array to use numeric indexes instead of string indexes. One way to do this is use the sort() method. So if you have the $my_array as defined above then you could do:
sort($my_array);

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Now $my_array is Array ( [0] => Alabama [1] => AL) and you can use [0] and [1] to get the values.
$first_value = $my_array[0];
$second_value = $my_array[1];

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0
 
LVL 11

Expert Comment

by:Bruce Smith
ID: 34243985
@jebpotly: Sweet, did not know about "array_keys($my_array);" Thanks
0
 
LVL 1

Expert Comment

by:jebpotly
ID: 34244028
;)
0

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