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<p><p><?<br />/**<br />* 转换为UNIX时间戳<br />*/<br />function gettime($d) {<br /> if(is_numeric($d))<br /> return $d;<br /> else {<br /> if(! is_string($d)) return 0;<br /> if(ereg(":",$d)) {<br /> $buf = split(" +",$d);<br /> $year = split("[-/]",$buf[0]);<br /> $hour = split(":",$buf[1]);<br /> if(eregi("pm",$buf[2]))<br /> $hour[0] += 12;<br /> return mktime($hour[0],$hour[1],$hour[2],$year[1],$year[2],$year[0]);<br /> }else {<br /> $year = split("[-/]",$d);<br /> return mktime(0,0,0,$year[1],$year[2],$year[0]);<br /> }<br /> }<br />}</p><p>/**<br />*<br />* DateAdd(interval,number,date)<br />* 返回已添加指定时间间隔的日期。<br />* Inetrval为表示要添加的时间间隔字符串表达式,例如分或天<br />* number为表示要添加的时间间隔的个数的数值表达式<br />* Date表示日期<br />*<br />* Interval(时间间隔字符串表达式)可以是以下任意值: <br />* yyyy year年 <br />* q Quarter季度 <br />* m Month月 <br />* y Day of year一年的数 <br />* d Day天 <br />* w Weekday一周的天数 <br />* ww Week of year周 <br />* h Hour小时 <br />* n Minute分 <br />* s Second秒 <br />* w、y和d的作用是完全一样的,即在目前的日期上加一天,q加3个月,ww加7天。 <br />*/<br />function DateAdd($interval, $number, $date) {<br /> $date = gettime($date);<br /> $date_time_array = getdate($date); <br /> $hours = $date_time_array["hours"]; <br /> $minutes = $date_time_array["minutes"]; <br /> $seconds = $date_time_array["seconds"]; <br /> $month = $date_time_array["mon"]; <br /> $day = $date_time_array["mday"]; <br /> $year = $date_time_array["year"]; <br /> switch ($interval) { <br /> case "yyyy": $year +=$number; break; <br /> case "q": $month +=($number*3); break; <br /> case "m": $month +=$number; break; <br /> case "y": <br /> case "d": <br /> case "w": $day+=$number; break; <br /> case "ww": $day+=($number*7); break; <br /> case "h": $hours+=$number; break; <br /> case "n": $minutes+=$number; break; <br /> case "s": $seconds+=$number; break; <br /> } <br /> $timestamp = mktime($hours ,$minutes, $seconds,$month ,$day, $year); <br /> return $timestamp;<br />} </p><p>/**<br />* DateDiff(interval,date1,date2)<br />* 返回两个日期之间的时间间隔<br />* intervals(时间间隔字符串表达式)可以是以下任意值: <br />* w 周<br />* d 天<br />* h 小时<br />* n 分钟<br />* s 秒<br />*/<br />function DateDiff ($interval, $date1,$date2) { <br /> // 得到两日期之间间隔的秒数 <br /> $timedifference = gettime($date2) - gettime($date1); <br /> switch ($interval) { <br /> case "w": $retval = bcdiv($timedifference ,604800); break; <br /> case "d": $retval = bcdiv( $timedifference,86400); break; <br /> case "h": $retval = bcdiv ($timedifference,3600); break; <br /> case "n": $retval = bcdiv( $timedifference,60); break; <br /> case "s": $retval = $timedifference; break; <br /> } <br /> return $retval;<br />} <br />?><br /><?<br />// 测试例<br />$d1 = "2002-01-11";<br />$d2 = date("Y-m-d",dateadd("d",15,$d1));<br />echo $d1."的". datediff("d",$d1,$d2)."天后是$d2<br>";<br />echo $d1."的10天前是".date("Y-m-d",dateadd("d",-10,$d1))."<br>";<br />$d3 = date("Y/m/d H:i:s");<br />echo "现在是".$d3."距离2002/2/12 12:59:59还有".datediff("s",$d3,"2002/2/12 12:59:59")."秒<br>";<br />?></p></p> |
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