分享php计算当天剩余时间最便捷和最快的方法

echo strtotime('23:59:59')-time();

$now = time(); echo 86400-date('H', $now)*3600- date('i', $now)*60-date('s');

echo 86400-(time()+8*3600)%86400;

xubanditdeMacBook-Pro:~ xubandit$ time php -f a.php real 0m31.146s user 0m30.966s sys 0m0.075s xubanditdeMacBook-Pro:~ xubandit$ time php -f b.php real 0m48.574s user 0m48.329s sys 0m0.098s xubanditdeMacBook-Pro:~ xubandit$ time php -f c.php real 0m11.156s user 0m10.786s sys 0m0.098s xubanditdeMacBook-Pro:~ xubandit$ cat a.php 
         

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