因工作需要，故写之：
<?php
function dateMonthDiff($d1,$d2)
{
<?php
function dateMonthDiff($d1,$d2)
{
$m1 = date("n",strtotime($d1));
$m2 = date("n",strtotime($d2));
$y1 = date("Y",strtotime($d1));
$y2 = date("Y",strtotime($d2));
$a = ($y2-$y1)*12+($m2-$m1)+1;
return $a;
}
//example
$d1 = "2006-1-10";
$d2 = "2006-3-1";
echo dateMonthDiff($d1,$d2);
?>
有更好的实现方法的欢迎讨论