'Cannot use object of type stdClass as array' using Wordpress

Question

I am trying to retrieve the slug for a tag inside a wordpress post, now its possible to get all tag info using

$tag = wp_get_post_tags($post->ID); 

More info on this on the Wordpress Docs

By using this you should get data returned like this...

Array (    [0] => stdClass Object        (            [term_id] => 4            [name] => tag2            [slug] => tag2            [term_group] => 0            [term_taxonomy_id] => 4            [taxonomy] => post_tag            [description] =>             [parent] => 0            [count] => 7        )     [1] => stdClass Object        (            [term_id] => 7            [name] => tag5            [slug] => tag5            [term_group] => 0            [term_taxonomy_id] => 7            [taxonomy] => post_tag            [description] =>             [parent] => 0            [count] => 6        )  ) 

Now what I want is the slug for the first item which should be as follows

$tag[0]['slug'] 

However by doing so I recieve this php error:

Cannot use object of type stdClass as array

Can someone tell me what I'm doing wrong here? and whats the best way to get the slug data

Answer 1

Note that the array contains objects (instances of stdClass), not other arrays. So the syntax is:

$tag[0]->slug 

Answer 2

Another option should be to explicitly cast $tag[0] into an array:

$t = (array)$tag[0]; $t["slug"] = ... 

Can't get it to work though