(PHP 5, PHP 7, PHP 8)
mysqli_stmt::attr_get -- mysqli_stmt_attr_get — Used to get the current value of a statement attribute
面向对象风格
$attribute): int过程化风格
Gets the current value of a statement attribute.
stmt仅以过程化样式:由 mysqli_stmt_init() 返回的 statement 标识。
attributeThe attribute that you want to get.
   Returns false if the attribute is not found, otherwise returns the value of the attribute.