php實作DateDiff和DateAdd時間函數代碼
釋出于 2014-08-17 11:33:00 | 475 次閱讀 | 評論: 0 | 來源: 網友投遞
PHP開源腳本語言PHP(外文名: Hypertext Preprocessor，中文名：“超文本預處理器”)是一種通用開源腳本語言。文法吸收了C語言、Java和Perl的特點，入門門檻較低，易于學習，使用廣泛，主要适用于Web開發領域。PHP的檔案字尾名為php。
本文是用php實作的二個時間函數datediff和dateadd,DateDiff用來計算兩個時間的間隔,DateAdd用來對兩個時間進行相加,感興趣的同學參考下.
注:php官方以經有這二個函數的類似功能,php5.3以上版本可用.
date_diff見:http://cn2.php.net/manual/zh/function.date-diff.php
date_add見:http://cn2.php.net/manual/zh/function.date-add.php
擴充php中的時間函數DateDiff和DateAdd
function DateDiff($part, $begin, $end)
{
$diff = strtotime($end) - strtotime($begin);
switch($part)
{
case "y": $retval = bcdiv($diff, (60 * 60 * 24 * 365)); break;
case "m": $retval = bcdiv($diff, (60 * 60 * 24 * 30)); break;
case "w": $retval = bcdiv($diff, (60 * 60 * 24 * 7)); break;
case "d": $retval = bcdiv($diff, (60 * 60 * 24)); break;
case "h": $retval = bcdiv($diff, (60 * 60)); break;
case "n": $retval = bcdiv($diff, 60); break;
case "s": $retval = $diff; break;
}
return $retval;
}
function DateAdd($part, $number, $date)
{
$date_array = getdate(strtotime($date));
$hor = $date_array["hours"];
$min = $date_array["minutes"];
$sec = $date_array["seconds"];
$mon = $date_array["mon"];
$day = $date_array["mday"];
$yar = $date_array["year"];
switch($part)
{
case "y": $yar += $number; break;
case "q": $mon += ($number * 3); break;
case "m": $mon += $number; break;
case "w": $day += ($number * 7); break;
case "d": $day += $number; break;
case "h": $hor += $number; break;
case "n": $min += $number; break;
case "s": $sec += $number; break;
}
return date("Y-m-d H:i:s", mktime($hor, $min, $sec, $mon, $day, $yar));
}
Function DateAdd($part, $n, $date)
{
switch($part)
{
case "y": $val = date("Y-m-d H:i:s", strtotime($date ." +$n year")); break;
case "m": $val = date("Y-m-d H:i:s", strtotime($date ." +$n month")); break;
case "w": $val = date("Y-m-d H:i:s", strtotime($date ." +$n week")); break;
case "d": $val = date("Y-m-d H:i:s", strtotime($date ." +$n day")); break;
case "h": $val = date("Y-m-d H:i:s", strtotime($date ." +$n hour")); break;
case "n": $val = date("Y-m-d H:i:s", strtotime($date ." +$n minute")); break;
case "s": $val = date("Y-m-d H:i:s", strtotime($date ." +$n second")); break;
}
return $val;
}
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