//一、获取当前时间戳

方法1：通过time函数

1 time();

方法2：通过$_SERVER中的REQUEST_TIME元素

$_SERVER['REQUEST_TIME'];

方法3:通过strtotime函数

strtotime('now'));

二、获取当前时间

通过date函数格式化时间戳

1 echo date('Y-m-d h:i:s', time()); // 2016-12-31 05:07:05

date_default_timezone_set('PRC'); //默认时区

echo "今天:",date("Y-m-d",time()),"
";

echo "今天:",date("Y-m-d",strtotime("18 june 2008")),"
";

echo "昨天:",date("Y-m-d",strtotime("-1 day")), "
";

echo "明天:",date("Y-m-d",strtotime("+1 day")), "
";

echo "一周后:",date("Y-m-d",strtotime("+1 week")), "
";

echo "一周零两天四小时两秒后:",date("Y-m-d G:H:s",strtotime("+1 week 2 days 4 hours 2 seconds")), "
";

echo "下个星期四:",date("Y-m-d",strtotime("next Thursday")), "
";

echo "上个周一:".date("Y-m-d",strtotime("last Monday"))."
";

echo "一个月前:".date("Y-m-d",strtotime("last month"))."
";

echo "一个月后:".date("Y-m-d",strtotime("+1 month"))."
";

echo "十年后:".date("Y-m-d",strtotime("+10 year"))."
";

jquery.min.js

姓名

js部分

$(function (){

var user_Boolean = false;

$("#User_username").blur(function (){

var name = $("#User_username").val();

if(name != ''){

var url ='checknm';

var data ={"name":name};

var success =function (response){

if(response.error == 0){

$('.uer_class').html("已经存在用户").css("color","red");

user_Boolean = false;

}

if(response.error == 1){

$('.uer_class').html("✔可以使用").css("color","green");

user_Boolean = true;

}

}

$.post(url,data,success,"json");

}else{

$('.uer_class').html("请输入用户名").css("color","red");

user_Boolean = false;

}

});

$('.red_button').click(function(){

if(user_Boolean == true){

alert("注册成功");

$("form").submit();

}else {

alert("请完善信息");

}

});

});

php后台部分

function checknm($name){

$info = D('user')->where("user_name ='$name'")->find();

if($info){

$response = array(

'error'=>0,

'errmsg'=>'用户已经存在',

'data' =>false

);

}else{

$response = array(

'error'=>1,

'errmsg'=>'可以使用',

'data' =>true

);

}

echo json_encode($response);

}