How to set GLOBAL group_concat_max_len

Question

What is PHP code, please, SET GLOBAL group_concat_max_len=15000 or SET SESSION group_concat_max_len=15000with MySQL?

Answer 1

Could you just fulfill the request?

$query = 'SET GLOBAL group_concat_max_len=15000';

mysql_query($query);

Answer 2

Run this as a query using mysql_query()from PHP. This works for me.

You must do this as root, otherwise it will be falter error: Access denied.