PHP 函数 best_len_title() 解释：生成最佳长度标题

function best_len_title($keyword, $arr) {\n $best_len = 65;\n $good_length = [];\n shuffle($arr);\n foreach ($arr as $key=>$value) {\n if (isset($arr[$key+1])) {\n $title = $keyword.','.$value;\n $good_length[] = $title;\n if (strlen($title)<$best_len) {\n if (strlen($title) > 10)\n return $title;\n }\n }\n }\n}