从数组中为每个循环构建简单的PHP

Question

I have an array called $user_ids that prints as:

Array ( [0] => stdClass Object ( [user_id] => 1 ) [1] => stdClass Object ( [user_id] => 2 ) )

I want to perform send_msg for every user_id in the array. In the example above, I want to achieve the equivalent of this:

send_msg( 1, $body_input, $subject_input);  
send_msg( 2, $body_input, $subject_input);  

This is what I have tried but it doesn't work.

foreach ($user_ids as $user_N){
send_msg( $user_N, $body_input, $subject_input);    
}

Answer 1

In PHP >= 7.0.0 you can extract all of the user_ids from the objects with array_column:

foreach(array_column($user_ids, 'user_id') as $user_N) {
    send_msg($user_N, $body_input, $subject_input);    
}