mktimeを使います。

$day1 = ‘2008/2/1’;
$day2 = ‘2008/2/15’;

if(mktime($start)>mktime($end)){$end = “error”;}

Twitter:
Warning: Undefined array key "Twitter" in /home/sazaeau/mizoshiri.com/public_html/blog.mizoshiri.com/wp-content/plugins/sns-count-cache/sns-count-cache.php on line 2897
0 | Facebook: 0 | Google Plus:
Warning: Undefined array key "Google+" in /home/sazaeau/mizoshiri.com/public_html/blog.mizoshiri.com/wp-content/plugins/sns-count-cache/sns-count-cache.php on line 2897
0 | Hatena: 0 | Pocket: 0 | Total: 0 | Feedly: 0

If you don’t think of your future you may loss your chance.
You have to think of your future and then you should decide your action.
Life is so short!! I dont have much time.

Twitter:
Warning: Undefined array key "Twitter" in /home/sazaeau/mizoshiri.com/public_html/blog.mizoshiri.com/wp-content/plugins/sns-count-cache/sns-count-cache.php on line 2897
0 | Facebook: 0 | Google Plus:
Warning: Undefined array key "Google+" in /home/sazaeau/mizoshiri.com/public_html/blog.mizoshiri.com/wp-content/plugins/sns-count-cache/sns-count-cache.php on line 2897
0 | Hatena: 0 | Pocket: 0 | Total: 0 | Feedly: 0

I like this theme!!
But I have to fix side bar and contents…

Twitter:
Warning: Undefined array key "Twitter" in /home/sazaeau/mizoshiri.com/public_html/blog.mizoshiri.com/wp-content/plugins/sns-count-cache/sns-count-cache.php on line 2897
0 | Facebook: 0 | Google Plus:
Warning: Undefined array key "Google+" in /home/sazaeau/mizoshiri.com/public_html/blog.mizoshiri.com/wp-content/plugins/sns-count-cache/sns-count-cache.php on line 2897
0 | Hatena: 0 | Pocket: 0 | Total: 0 | Feedly: 0