note 76736 modified in function.time by danbrown
| From: | danbrown@php.net | Date: | Sun, 20 Jul 2008 04:19:48 +0000 |
| Subject: | note 76736 modified in function.time by danbrown | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-142126@lists.php.net to get a copy of this message | ||
Fixed divide by zero warnings given by the timeDiff function. The change is that the for loop
doesn't count down to 0 anymore, just 1. I dont think it has any side effects.
<?php
# max_detail_levels - how deep to go down? If max_detail_levels is set to 2, text will output
something like "3 days 4 hours" instead of "3 days 4 hours 10 minutes 55
seconds"
# precision_level - this is what rspenc29 was trying to accomplish. If you want to only report a
minimum value of say 1 hour, then you should set this to "hour"
function timeDiff($timestamp,$detailed=false, $max_detail_levels=8,
$precision_level='second'){
$now = time();
#If the difference is positive "ago" - negative "away"
($timestamp >= $now) ? $action = 'away' : $action = 'ago';
# Set the periods of time
$periods = array("second", "minute", "hour", "day",
"week", "month", "year", "decade");
$lengths = array(1, 60, 3600, 86400, 604800, 2630880, 31570560, 315705600);
$diff = ($action == 'away' ? $timestamp - $now : $now - $timestamp);
$prec_key = array_search($precision_level,$periods);
# round diff to the precision_level
$diff = round(($diff/$lengths[$prec_key]))*$lengths[$prec_key];
# if the diff is very small, display for ex "just seconds ago"
if ($diff <= 10) {
$periodago = max(0,$prec_key-1);
$agotxt = $periods[$periodago].'s';
return "just $agotxt $action";
}
# Go from decades backwards to seconds
$time = "";
for ($i = (sizeof($lengths) - 1); $i>0; $i--) {
if($diff > $lengths[$i-1] && ($max_detail_levels > 0)) { # if the
difference is greater than the length we are checking... continue
$val = floor($diff / $lengths[$i-1]); # 65 / 60 = 1. That means one minute. 130 /
60 = 2. Two minutes.. etc
$time .= $val ." ". $periods[$i-1].($val > 1 ? 's ' : '
'); # The value, then the name associated, then add 's' if plural
$diff -= ($val * $lengths[$i-1]); # subtract the values we just used from the overall
diff so we can find the rest of the information
if(!$detailed) { $i = 0; } # if detailed is turn off (default) only show the first
set found, else show all information
$max_detail_levels--;
}
}
# Basic error checking.
if($time == "") {
return "Error-- Unable to calculate time.";
} else {
return $time.$action;
}
}
?>
[EDIT by danbrown AT php DOT net: Modifications from the original below up to this version were
deleted from the user notes. The following people contributed bug fixes and code to reach this
version:
shdowhawk at gmail dot com
nimit dot maru at dontspam-gmail dot com
rspenc29 at gmail dot com
sunjith
ron at sdcausa dot org
Credit for this function is due to the above authors in addition to the authors of the original and
final version.
--was--
Fixed divide by zero warnings given by the timeDiff function. The change is that the for loop
doesn't count down to 0 anymore, just 1. I dont think it has any side effects.
<?php
# max_detail_levels - how deep to go down? If max_detail_levels is set to 2, text will output
something like "3 days 4 hours" instead of "3 days 4 hours 10 minutes 55
seconds"
# precision_level - this is what rspenc29 was trying to accomplish. If you want to only report a
minimum value of say 1 hour, then you should set this to "hour"
function timeDiff($timestamp,$detailed=false, $max_detail_levels=8,
$precision_level='second'){
$now = time();
#If the difference is positive "ago" - negative "away"
($timestamp >= $now) ? $action = 'away' : $action = 'ago';
# Set the periods of time
$periods = array("second", "minute", "hour", "day",
"week", "month", "year", "decade");
$lengths = array(1, 60, 3600, 86400, 604800, 2630880, 31570560, 315705600);
$diff = ($action == 'away' ? $timestamp - $now : $now - $timestamp);
$prec_key = array_search($precision_level,$periods);
# round diff to the precision_level
$diff = round(($diff/$lengths[$prec_key]))*$lengths[$prec_key];
# if the diff is very small, display for ex "just seconds ago"
if ($diff <= 10) {
$periodago = max(0,$prec_key-1);
$agotxt = $periods[$periodago].'s';
return "just $agotxt $action";
}
# Go from decades backwards to seconds
$time = "";
for ($i = (sizeof($lengths) - 1); $i>0; $i--) {
if($diff > $lengths[$i-1] && ($max_detail_levels > 0)) { # if the
difference is greater than the length we are checking... continue
$val = floor($diff / $lengths[$i-1]); # 65 / 60 = 1. That means one minute. 130 /
60 = 2. Two minutes.. etc
$time .= $val ." ". $periods[$i-1].($val > 1 ? 's ' : '
'); # The value, then the name associated, then add 's' if plural
$diff -= ($val * $lengths[$i-1]); # subtract the values we just used from the overall
diff so we can find the rest of the information
if(!$detailed) { $i = 0; } # if detailed is turn off (default) only show the first
set found, else show all information
$max_detail_levels--;
}
}
# Basic error checking.
if($time == "") {
return "Error-- Unable to calculate time.";
} else {
return $time.$action;
}
}
?>
http://php.net/manual/en/function.time.php