php - 如何从 PHP 中的时间戳格式化日期？

Question

我有一个类型为“timestamp”的数据库行。每次添加新记录时，它都会自动填充该记录的插入时间。现在，对于其中一条记录，它的值是:

2010-06-19 18:40:51

我试图通过以下方式将其转换为对用户更友好的格式:

$timeStamp = $row['date'];
$timeStamp = date( "m/d/Y", $timeStamp);

但它返回这个:

12/31/1969

我在某处读到日期函数只能用于 unix 时间戳，也许我数据库中的时间戳不是正确的时间戳，我需要先将其转换为时间戳，然后再对其使用日期函数(？) .解决方案是什么？

Answer 1

使用strtotime功能:

$timeStamp = $row['date'];
$timeStamp = date( "m/d/Y", strtotime($timeStamp));

对于示例中的日期 2010-06-19 18:40:51，它将返回:

06/19/2010

timestamp 字段会自动更新，但您可以通过将其更改为 DEFAULT CURRENT_TIMESTAMP 来禁用该行为，否则它将自动更新。来自manual :

In a CREATE TABLE statement, the first TIMESTAMP column can be declared in any of the following ways:

With both DEFAULT CURRENT_TIMESTAMP and ON UPDATE CURRENT_TIMESTAMP clauses, the column has the current timestamp for its default value, and is automatically updated.

With neither DEFAULT nor ON UPDATE clauses, it is the same as DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP.

With a DEFAULT CURRENT_TIMESTAMP clause and no ON UPDATE clause, the column has the current timestamp for its default value but is not automatically updated.