functiondateBDate($date1,$date2){

//日期1是否大于日期2

$month1=date("m",strtotime($date1));

$month2=date("m",strtotime($date2));

$day1=date("d",strtotime($date1));

$day2=date("d",strtotime($date2));

$year1=date("Y",strtotime($date1));

$year2=date("Y",strtotime($date2));

$from=mktime(0,0,0,$month1,$day1,$year1);

$to=mktime(0,0,0,$month2,$day2,$year2);

if($from>$to){

returntrue;

}else{

returnfalse;

}

}

?>

$date1="2009-10-13";

$date=mktime(0,0,0,date("m",strtotime($date1)),date("d",strtotime($date1)),date("Y",strtotime($date1)));

最终取得一个日期的Unix时间戳$date=1255392000。

很多时候做搜索的时候，搜索的时间不能大于当前日期，比较函数的写法大致和上面一个函数相同，具体如下：

functiondateBCurrent($date){

//日期是否大于当前日期

$currentDate=date("Y-m-d");

//获取当前日期

$cYear=date("Y",strtotime($currentDate));

$cMonth=date("m",strtotime($currentDate));

$cDay=date("d",strtotime($currentDate));

$year=date("Y",strtotime($date));

$month=date("m",strtotime($date));

$day=date("d",strtotime($date));

$currentUnix=mktime(0,0,0,$cMonth,$cDay,$cYear);

//当前日期的Unix时间戳

$dateUnix=mktime(0,0,0,$month,$day,$year);

//待比较日期的Unix时间戳

if($dateUnix<=$currentUnix){

returntrue;

}else{

returnfalse;

}

}

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