php - How to assign object's parameter based on it's other parameters upon defining? -

php - How to assign object's parameter based on it's other parameters upon defining? -

how assign object's parameter based on it's other parameters upon defining?

i want assing $universalquery_count $mysql_count & $sqlserver_count with:

class productlist { protected $universalquery_count = " select count(*) table table.type= :type ", $mysql_count = $universalquery_count, $sqlserver_count = $universalquery_count; }

but get

parse error: syntax error, unexpected '$universalquery_count' (t_variable)

php oop