PHP Imploding Multidimention Array : i need to implode an multidimentional array in a string using implode, i tried using the array_map shown here http://stackoverflow.com/a/16710869/2717182 but i failed.

my array is as below :

    Array ( [0] => Array ( [code] => IRBK1179 [qty] => 1 ) [1] => Array ( [code] => IRBK1178 [qty] => 1 ) [2] => Array ( [code] => IRBK1177 [qty] => 1 ) ) 

i need to implode the array into string formatted like :
IRBK1179:1|IRBK1178:1|IRBK1177:1

TQ