求两个日期的差数,例如2015-2-25,2015-7-22的日期差
<?php function between ($day1, $day2) { if(strtotime($day1) < strtotime($day2)){ return (strtotime($day2) - strtotime($day1))/86400; } else { return (strtotime($day1) - strtotime($day2))/86400; } } echo between ("2015-2-25", "2015-7-22");
输出:147