php - Display value of specific element from multi dimensional array -


please help, how can display posts site_id 1 below multidimensional array , display comma separated 4295, 4289, 4298, 4292

print_r($favorites);  array (     [0] => array         (             [site_id] => 1             [posts] => array                 (                     [0] => 4295                     [1] => 4289                     [2] => 4298                     [3] => 4292                 )              [groups] => array                 (                     [0] => array                         (                             [group_id] => 1                             [site_id] => 1                             [group_name] => default list                             [posts] => array                                 (                                     [0] => 4295                                     [1] => 4289                                     [2] => 4298                                     [3] => 4292                                 )                          )                  )          )  )


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