将PHP关联数组转换为仅包含值的字符串的最佳方法是什么

Question

$columns = array(
    'Team 1' => 'baltimore',
    'Team 2' => 'michigan'
);

如何将其转换为字符串=＆gt;

baltimore, michigan

Answer 1

$string = implode(', ', $columns);

或

$string = join(', ', $columns);