How to solve the PHP countdown-0 Scenario

This article mainly introduces how to solve the PHP countdown 0 situation, the case analysis of the PHP Countdown program appeared-0 reasons and the corresponding solution, with a certain reference value, the need for friends can refer to the next

Specific as follows:

question: Today there is feedback, said the countdown appeared-0 days of the situation, I looked at the program, the trough, how did not test to

The reason is that PHP logic is judged in -0 > 0

Analysis: code with errors posted

$starttime   = 1362585600;//3.7 early $nowtime   = 1362618921;//3.7 Morning $off = Ceil (($starttime-$nowtime)/86400);// Countdown if ($off < 0) {  $off = 0;} $b = $starttime-$nowtime; $c = $b/86400; $d = Ceil ($c); Var_dump (Array (' Start-now ' + $b), array (' float_day ' = = $c), Array (' int_day ' = $d), array (' off ' = $off)), if ( -0 < 0) {  echo '-0 < 0 ';} else {  echo '-0 > 0 ';}

Output:

Array ' start-now ' = = Int-33321array ' float_day ' + float-0.385659722222array ' int_day ' = = Float-0array ' off ' = > float-0-0 > 0

Process:

When the start time and the current time are the same day, the upper calculation process is due to -0 > 0 so that the case of off =-0 appears

Improved:

$starttime   = 1362585600;//3.7 early $nowtime   = 1362618921;//3.7 Morning if ($starttime-$nowtime) < 0) {  $off = 0;} else {  $off = ceil (($starttime-$nowtime)/86400);}

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