PHP将mysql查询字符串转换为mm :ss time format

Question

我试图了解如何获取两个 mysql varchar 字符串之间的差异，它们的格式为 mm:ss，其中 m 代表分钟，s 代表秒。举个例子。

$a = 13:20;
$b = 13:00;

我要使用什么函数才能做到这一点

 $a - $b =  00:20 ?

$a = strtotime('13:20');
$b = strtotime('13:00');
echo "The time difference between 13:20 and 13:00 is : "  . ($a - $b);

Gives me 
The time difference between 13:20 and 13:00 is : 1200

Kindly take note of my original format. mm:ss

Answer 1

使用strtotime()

试试这个...

$time1 = explode(':', '13:20');
$time2 = explode(':', '13:00');

$a = 00 . ':' . $time1[0] . ':' . $time1[1];
$b = 00 . ':' . $time2[0] . ':' . $time2[1];

echo "The time difference between 13:20 and 13:00 is : "  . (strtotime($a) - strtotime($b));