php - Find interception of two arrays and then merge the two -

i have large array of hostnames , corresponding location.

 array ( [abc01] => array ( [hostid] => 12345                              [lat] => 123                             [lon] => 123                             [adr] => 126 foo street                             [city] => rocky hill                              [state] => connecticut                             [country] => usa )           [abc02] => array ( [hostid] => 12346                              [lat] => 345                             [lon] => 345                             [adr] => 123 foo street                              [city] => boston                              [state] => massachusetts                             [country] => usa )           [abc03] => array ( [hostid] => 12346                              [lat] => 345                             [lon] => 345                             [adr] => 123 foo street                              [city] => new york city                             [state] => new york                             [country] => usa )           .....) 

i comparing smaller array - same host name links ip address:

 array ( [abc01] => array ( [ip] => 192.168.2.1 )           [abc02] => array ( [ip] => 192.168.2.2 )          [abc03] => array ( [ip] => 192.168.2.3 )        ) 

i want create following array:

         [abc02] => array ( [hostid] => 12346                              [lat] => 345                             [lon] => 345                             [adr] => 123 foo street                              [city] => boston                              [state] => massachusetts                             [country] => usa                             [ip] => 192.168.2.1) 

i'm trying find intersection of arrays , merge 2 (find same key , merge). i've tried various functions end result never want.

i managed find function here merge common keys, returned ip in array in array containing location fields in array, seen below:

array ( [abc02] => array ( [0] => array ( [hostid] => 12346                             [lat] => 345                            [lon] => 345                            [adr] => 123 foo street                             [city] => boston                             [state] => massachusetts                            [country] => usa                            [1] => array ( [ip] => 192.168.2.1) ) ) 

is there easier way this?

pretty easy built-in php function:

$result = array_merge_recursive($large, $small); 

based on comment values common , merge. assumes keys in $small in $large:

$result = array_merge_recursive(array_intersect_key($large, $small), $small); 

to not make assumption, if there may keys in either 1 aren't in other then:

$result = array_merge_recursive(array_intersect_key($large, $small),                                 array_intersect_key($small, $large));