php時間處理

php時間處理 使用strtotime mktime 配合 date 

原理： 計算時間戳  date格式化

看例子：

//先看簡單的

echo '';
date_default_timezone_set('prc');
echo "今天:",date("y-m-d",time()),"
";echo "今天:",date("y-m-d",strtotime("now")),"
";echo "今天:",date("y-m-d",strtotime("13 nov 2014")),"
";//將描述性日期格式化
echo "昨天:(-1 day)",date("y-m-d",strtotime("-1 day")),"
";echo "明天:(+1 day)",date("y-m-d",strtotime("+1 day")),"
";echo "第幾個月:",date("n"),"
";echo "本週週幾:",date("n"),"
";echo "本月天數:",date("t"),"
";echo "一周後:(+1 week)",date("y-m-d",strtotime("+1 week")),"
";echo "上乙個周一:(-1 week monday)",date("y-m-d",strtotime("-1 week monday")),"
";echo "上乙個周一:(last monday)".date("y-m-d",strtotime("last monday")),"
";echo "上乙個週末:(-1 week sunday)",date("y-m-d",strtotime("-1 week sunday")),"
";echo "下乙個周一:(+0 week monday)",date("y-m-d",strtotime("+0 week monday")),"
";echo "下乙個周一:(0week monday)",date("y-m-d",strtotime("0week monday")),"
";echo "本周四:(+0 week thursday)",date("y-m-d",strtotime("+0 week thursday")),"
";echo "下乙個周四:(next thursday)",date("y-m-d",strtotime("next thursday")), "
";echo "本週末:(0 week sunday)",date("y-m-d",strtotime("0 week sunday")),"
";echo "一周零兩天三小時四秒後:(+1 week 2 days 3 hours 4 seconds)",date("y-m-d g:h:s",strtotime("+1 week 2 days 3 hours 4 seconds")),"
";echo "一月前:(last month)".date("y-m-d",strtotime("last month")),"
";echo "一月後:(+1 month)".date("y-m-d",strtotime("+1 month")),"
";echo "十年後:(+10 year)".date("y-m-d",strtotime("+10 year")),"
";//下面的比較複雜了
echo '
上週:';
echo date("y-m-d h:i:s",mktime(0, 0 , 0,date("m"),date("j")-date("n")-7+1,date("y"))),"
";echo date("y-m-d h:i:s",mktime(23,59,59,date("m"),date("j")-date("n")+7-7,date("y"))),"
";echo '
本週:';
echo date("y-m-d h:i:s",mktime(0, 0 , 0,date("m"),date("j")-date("n")+1,date("y"))),"
";echo date("y-m-d h:i:s",mktime(23,59,59,date("m"),date("j")-date("n")+7,date("y"))),"
";echo '
上月:';
echo date("y-m-d h:i:s",mktime(0, 0 , 0,date("m")-1,1,date("y"))),"
";echo date("y-m-d h:i:s",mktime(23,59,59,date("m"),0,date("y"))),"
";echo '
本月:';
echo date("y-m-d h:i:s",mktime(0, 0 , 0,date("m"),1,date("y"))),"
";echo date("y-m-d h:i:s",mktime(23,59,59,date("m"),date("t"),date("y"))),"
";$getmonthdays = date("t",mktime(0, 0 , 0,date('n')+(date('n')-1)%3,1,date("y")));//本季度未最後一月天數
echo '
本季度:
';echo date('y-m-d h:i:s', mktime(0, 0, 0,date('n')-(date('n')-1)%3,1,date('y'))),"
";echo date('y-m-d h:i:s', mktime(23,59,59,date('n')+(date('n')-1)%3,$getmonthdays,date('y'))),"
";die;

這裡貼上乙個日期驗證函式 

var_dump(checkdate(2, 29, 2001));

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