如何解析此PHP stdClass对象？

Question

The raw output of my object is when I do a print_r is:

Array ( [0] => stdClass Object ( [COUNT(*)] => 3 ) )

How do I get to the 3 ?

This object is the result of a sql query inside wordpress with the $wpdb class.

I am a noob at PHP objects. Also would like to know

• where do I learn to do object parsing stuff like this?
• What kind of object is this? Why is it wrapped in an Array?

UPDATE: here's the source code:

global $wpdb;
$post_count = $wpdb->get_results("SELECT COUNT(*) FROM $wpdb->posts");
print_r($post_count);

Answer 1

It's not an object. It's an array containing an object. In that specific example, assuming that the variable is named $variable , you'd do this:

echo $variable[0]->{'COUNT(*)'};

Answer 2

I found the solution:

global $wpdb;
$post_count = $wpdb->get_results("SELECT COUNT(*) as postcount FROM $wpdb->posts");
print_r($post_count[0]->postcount);

I needed to use an alias.