Listing a PHP array of type object

Question

I have an array that looks like this:

Array ( [0] => stdClass Object ( [user_id] => 10 [date_modified] => 2010-07-25 01:51:48 ) [1] => stdClass Object ( [user_id] => 16 [date_modified] => 2010-07-26 14:37:24 ) [2] => stdClass Object ( [user_id] => 27 [date_modified] => 2010-07-26 16:49:17 ) [3] => stdClass Object ( [user_id] => 79 [date_modified] => 2010-08-08 18:53:20 ) ) 

and what I need to do is print the user id, divided like this:

10, 16, 27, 79

I assume this will be in a for loop, but I'm looking for the most efficient way to do this in PHP

Oh and array name: $ mArray

I tried this:

 foreach($mArray as $k => $cur) { echo $cur['user_id']; echo ','; } 

which others have suggested.

However, I keep getting this error:

Fatal error: you cannot use an object of type stdClass as an array.

I think because this array is not a typical array, so it requires a different syntax?

Answer 1

Each element of the array is a (anonymous) object, and user_id is a property. Use the syntax for accessing the properties of an object ( -> ) to access it:

 foreach($mArray as $k => $cur) { echo $cur->user_id; echo ','; } 

Answer 2

 foreach ($mArray as $cur){ echo $cur->user_id; } 

you can do it this way since you work with objects

Answer 3

Use this if you want to escape the trailing comma ( , ).

 $ids = array(); foreach ($array as $obj){ $ids[] = $obj->user_id; } echo join(', ', $ids); 

Answer 4

Pretty close ...

 foreach($mArrray as $k => $cur) { echo $cur->user_id.', '; }