//输出时间戳
ehco time();  //1590937860
//输出日期
echo date('Y-m-d');  //2020-05-31
echo date('Y-m-d H:i:s');  //2020-05-31 23:11:00
...
//时间戳转化为日期和时间
$date=date('Y-m-d',"1285724523");
echo $date."<br />\r\n";
--2010-09-29
...
//时间戳转化为时间
$date=date('Y-m-d H:i:s',"1285724523");
echo $date."<br />\r\n";
--2010-09-29 09:42:03
...
//将日期转化为时间戳
$date=date('Y-m-d',"1285724523");
$temp=explode("-",$date);
echo "--".$temp[0]."|".$temp[1]."|".$temp[2]."<br />\r\n";  //--2010|09|29
echo mktime(0,0,0,$temp[1],$temp[2],$temp[0])."<br />\r\n"; //1285689600
echo "--".mktime(0,0,0,9,29,2010)."<br />\r\n";  //--1285689600
...
//将时间转化为时间戳
$date=date('Y-m-d H:i:s',"1285724523");
echo $date."<br>";  //2010-09-29 09:42:03
$temp=explode(" ",$date);
$temp1=explode("-",$temp[0]);
$temp2=explode(":",$temp[1]);
echo mktime($temp2[0],$temp2[1],$temp2[2],$temp1[1],$temp1[2],$temp1[0])."<br />\r\n";  //1285724523
echo $temp2[0]."|".$temp2[1]."|".$temp2[2]."|".$temp1[1]."|".$temp1[2]."|".$temp1[0]."<br />\r\n";   
//-->09|42|03|09|29|2010
echo mktime(9,42,3,"09","29","2010")."<br />\r\n";   //1285724523
echo mktime(9,42,3,09,29,2010)."<br />\r\n";   //这样报错：年月日必须有引号
...
//示例：
$temp=explode(" ","2009-07-28 22:34:41");
$temp1=explode("-",$temp[0]);
$temp2=explode(":",$temp[1]);
echo mktime($temp2[0],$temp2[1],$temp2[2],$temp1[1],$temp1[2],$temp1[0])."<br />\r\n";  //1248791681
$atime=mktime($temp2[0],$temp2[1],$temp2[2],$temp1[1],$temp1[2],$temp1[0])."<br />\r\n";
//var_dump($atime)."<br />\r\n";  // string(18)"1248791681"
echo $atime;  //1248791681
echo date("Y-M-D h:i:s",$atime)."<br />\r\n";  //2009-Jul-Tue 10:34:41
echo date("Y-m-d h:i:s",$atime)."<br />\r\n";  //2009-07-28 10:34:41
echo date("y-m-d h:i:s",$atime)."<br />\r\n";  //09-07-28 10:34:41
echo date("Y-m-d H:i:s",$atime)."<br />\r\n";  //2009-07-28 22:34:41

完美原创，转载请注明原文链接！