date minus seconds总是返回相同[关闭]

echo date('Y-m-d H:m:s', strtotime('15 minutes ago')) . "<br/>";
echo date('Y-m-d H:m:s', time()-900) . "<br/>";
echo date('Y-m-d H:m:s', time());

I am running WAMPP on Windows 7 and all 3 calls returning same time.

'H:m:s' should be 'H:i:s'
   ^                 ^

Spot the difference

• m = Months
• i = Minutes

The error in your code:

'Y-m-d H:m:s' should be 'Y-m-d H:i:s'

m is month i is minute