Get key values from multidimensional array

Question

I have a page that searches a database and generates the following array. I'd like to be able to loop through the array and pick out the value next assigned to the key "contact_id" and do something with it, but I have no idea how to get down to that level of the array.

The array is dynamically generated, so depending on what I search for the index numbers under "values" will change accordingly.

I'm thinking I have to do a foreach starting under values, but I don't know how to start a foreach at a sublevel of an array.

Array ( 
[is_error] => 0 
[version] => 3 
[count] => 2 
[values] => Array ( 
    [556053] => Array ( 
        [contact_id] => 556053 
        [contact_type] => Individual 
        [first_name] => Brian 
        [last_name] => YYY 
        [contact_is_deleted] => 0 
    ) 
    [596945] => Array ( 
        [contact_id] => 596945 
        [contact_type] => Individual 
        [first_name] => Brian 
        [last_name] => XXX 
        [contact_is_deleted] => 0 
    ) 
)

)

I've looked at the following post, but it seems to only address the situation where the array indices are sequential. Multidimensional array - how to get specific values from sub-array

Any ideas?

Brian

Have you tried that solution in the other question? Hint: foreach ($array['values] as $contacts) { … } — Gordon
– Gordon, Commented Jul 25, 2011 at 17:33
use foreach instead of for. Alternatively, there is array_keys() which returns all keys from an array. — hakre
– hakre, Commented Jul 25, 2011 at 17:34
for random depths array see stackoverflow.com/questions/2416100/… — Gordon
– Gordon, Commented Jul 25, 2011 at 17:36

iLLin · Accepted Answer · 2011-07-25 17:35:50Z

3

You are correct in your assumption. You could do something like this:

foreach($array['values'] as $key => $values) {
  print $values['contact_id'];
}

That should demonstrate starting at a sub level. I would also add in your checks to see if its empty and if its an array... etc.

answered Jul 25, 2011 at 17:35

iLLin

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Comments

Peter · Accepted Answer · 2011-07-25 17:49:09Z

Another hint regarding syntax - if the array in your original example is called $a, then the values you want are here:

$a['values'][556053]['contact_id']

and here:

$a['values'][596945]['contact_id']

So if there's no additional structure in your array, then this loop is probably what you want:

foreach ($a['values'] as $toplevel_id => $record_data) {
    print "for toplevel_id=[$toplevel_id], contact_id=[" . $record_data['contact_id'] . "]\n";
}

Paul · Accepted Answer · 2011-07-25 17:36:36Z

1

foreach($array['values'] as $sub_arr){
    echo $sub_arr['contact_id'];
}

answered Jul 25, 2011 at 17:36

Paul

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