I have an array like this, i need to get the unique associative index
Array
(
[0] => Array
(
[id] => 200
[name] => james
[place] => ca
)
[1] => Array
(
[id] => 201
[name] => jana
[place] => uk
)
[2] => Array
(
[id] => 203
[name] => jana
[place] => ca
)
)
That means i need to get the unique 'place' from that array like
ca,uk