Implode data from a multi-dimensional array
问题 I\'m a novice at PHP and I need a quick solution to the following problem but can\'t seem to come up with one: I have a multi-dimensional array like so Array ( [0] => Array ( [blogTags_id] => 1 [tag_name] => google [inserted_on] => 2013-05-22 09:51:34 [inserted_by] => 2 ) [1] => Array ( [blogTags_id] => 2 [tag_name] => technology [inserted_on] => 2013-05-22 09:51:34 [inserted_by] => 2 ) ) I want to use the implode() to somehow return a comma-separated string containing values of tag_name key