PHP calculates a function usage instance before a given time _php tips

This article mainly introduces PHP to calculate a given time before the use of the function, the example analysis of PHP computing time skills, very practical value, the need for friends can refer to the next

The example in this article describes the function usage before PHP calculates a given time. Specific as follows:

Given a time here, calculate how long before this time, for example: 2 days ago, 1 years ago

<?phpfunction prettydate ($date) {$time = Strtotime ($date);  $now = time ();  $ago = $now-$time;    if ($ago <) {$when = round ($ago); $s = ($when = = 1)? "    Second ":" Seconds ";  return "$when $s ago";    }elseif ($ago < 3600) {$when = round ($ago/60); $m = ($when = = 1)? "    Minute ":" Minutes ";  return "$when $m ago";    }elseif ($ago >= 3600 && $ago < 86400) {$when = round ($ago/60/60); $h = ($when = = 1)? "    Hour ":" Hours ";  return "$when $h ago";    }elseif ($ago >= 86400 && $ago < 2629743.83) {$when = round ($ago/60/60/24); $d = ($when = = 1)? "    Day ': "Days";  return "$when $d ago";    }elseif ($ago >= 2629743.83 && $ago < 31556926) {$when = round ($ago/60/60/24/30.4375); $m = ($when = = 1)? "    Month ":" Months ";  return "$when $m ago";    }else{$when = round ($ago/60/60/24/365); $y = ($when = = 1)? "    Year ":" Years ";  return "$when $y ago"; }}echo prettydate ("2012-07-22 12:23:45"). " <br/> "; Echo pRettydate ("2010-11-12 22:25:45"). " <br/> "; Echo prettydate (" 2012-01-01 01:00:00 ")." <br/> "; Echo prettydate (" 2001-05-30 00:00:00 ")." <br/> ";

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