<?php
    echo date("Ymd",strtotime("now")), "\\n";
    echo date("Ymd",strtotime("-1 week Monday")), "\\n";
    echo date("Ymd",strtotime("-1 week Sunday")), "\\n";
    echo date("Ymd",strtotime("+0 week Monday")), "\\n";
    echo date("Ymd",strtotime("+0 week Sunday")), "\\n";
  
    echo "*********第幾個(gè)月:";
    echo date('n');
    echo "*********本周周幾:";
    echo date("w");
    echo "*********本月天數(shù):";
    echo date("t");
    echo "*********";
  
    echo '<br>上周起始時(shí)間:<br>';
    echo date("Y-m-d H:i:s",mktime(0, 0 , 0,date("m"),date("d")-date("w")+1-7,date("Y"))),"\\n";
    echo date("Y-m-d H:i:s",mktime(23,59,59,date("m"),date("d")-date("w")+7-7,date("Y"))),"\\n";
    echo '<br>本周起始時(shí)間:<br>';
    echo date("Y-m-d H:i:s",mktime(0, 0 , 0,date("m"),date("d")-date("w")+1,date("Y"))),"\\n";
    echo date("Y-m-d H:i:s",mktime(23,59,59,date("m"),date("d")-date("w")+7,date("Y"))),"\\n";
  
    echo '<br>上月起始時(shí)間:<br>';
    echo date("Y-m-d H:i:s",mktime(0, 0 , 0,date("m")-1,1,date("Y"))),"\\n";
    echo date("Y-m-d H:i:s",mktime(23,59,59,date("m") ,0,date("Y"))),"\\n";
    echo '<br>本月起始時(shí)間:<br>';
    echo date("Y-m-d H:i:s",mktime(0, 0 , 0,date("m"),1,date("Y"))),"\\n";
    echo date("Y-m-d H:i:s",mktime(23,59,59,date("m"),date("t"),date("Y"))),"\\n";
  
    $season = ceil((date('n'))/3);//當(dāng)月是第幾季度
    echo '<br>本季度起始時(shí)間:<br>';
    echo date('Y-m-d H:i:s', mktime(0, 0, 0,$season*3-3+1,1,date('Y'))),"\\n";
    echo date('Y-m-d H:i:s', mktime(23,59,59,$season*3,date('t',mktime(0, 0 , 0,$season*3,1,date("Y"))),date('Y'))),"\\n";
  
    $season = ceil((date('n'))/3)-1;//上季度是第幾季度
    echo '<br>上季度起始時(shí)間:<br>';
    echo date('Y-m-d H:i:s', mktime(0, 0, 0,$season*3-3+1,1,date('Y'))),"\\n";
    echo date('Y-m-d H:i:s', mktime(23,59,59,$season*3,date('t',mktime(0, 0 , 0,$season*3,1,date("Y"))),date('Y'))),"\\n";
?>
 

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