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