PHP checks whether it is a legal time format regular_PHP tutorial

The following summarizes several ways to use php to verify whether the date entered by the user is the correct date. Friends in need can refer to it.

The checkdate() function verifies a Gregorian date.

Example

/**

The code is as follows

代码如下	复制代码
var_dump(checkdate(12,31,2000)); var_dump(checkdate(2,29,2003)); var_dump(checkdate(2,29,2004)); ?>输出： bool(true) bool(false) bool(true)

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var_dump(checkdate(12,31,2000));
var_dump(checkdate(2,29,2003));
var_dump(checkdate(2,29,2004));
?>Output:

bool(true)
bool(false)
bool(true)

代码如下	复制代码
* 检查是否为一个合法的时间格式 * * @param string $time * @return void */ function is_time($time) { $pattern = '/[d]{4}-[d]{1,2}-[d]{1,2}s[d]{1,2}:[d]{1,2}:[d]{1,2}/'; return preg_match($pattern, $time); }

Regular date

代码如下	复制代码
$reg="/d{4}-d{2}-d{2}/"; preg_match($reg,$days,$arr); print_r($arr);

Example 1

The code is as follows

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* Check if it is a legal time format
*
* @param string $time
* @return void
*/
function is_time($time)
{
$pattern = '/[d]{4}-[d]{1,2}-[d]{1,2}s[d]{1,2}:[d]{1,2}:[d ]{1,2}/'; return preg_match($pattern, $time);
} Example 2 Regular verification date

The code is as follows	Copy code
$reg="/d{4}-d{2}-d{2}/"; preg_match($reg,$days,$arr); print_r($arr); http://www.bkjia.com/PHPjc/628963.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/628963.htmlTechArticleThe following summarizes several ways to use php to verify whether the date entered by the user is the correct date. Friends in need Can be used for reference. The checkdate() function verifies a Gregorian date. Example...