The fourth day of php practical combat_PHP tutorial

Okay, let’s take a look at the picture first. This is an ajax message board. It has a waterfall effect, haha

1. Today I learned jquery’s ajax and can directly code

[php] / JavaScript Document
$(document).ready(function(e) {
LoadHiglight();//Load highlight effects


$("#submit").click(function() { //"Message" button click event
//Get user name
        var strUsetName = $("#userName").val();
//Get the input message content
      var strContent = $("#content").val();
//Get input email address
      var strEmail = $("#email").val();

//Start sending data
         $.ajax({
​​​​​ url: 'index.php?m=index&a=add',
           type: 'POST',
             dataType: 'json',
data: {
                   userName: strUsetName,
content: strContent,
Email: strEmail
            },
Success: function(json, textStatus, xhr) {
If (json.state=='ok') {
                      alert('Operation prompt, message successful!');                                      //alert();                                             var data=json.data[0];
                       var strTag=createTag(data.userName,data.content,data.time);

                             $(strTag).prependTo('div #liuyan');

//$("Hello World!").prependTo("p");
                                                                                                                                                                  alert('Operation prompt, message failed! Error message:'+json.error);
                                                                                                                                                                                                                                                                      })
});
//Dynamic loading of messages
loadMore();
});

//Monitor scroll bar scrolling
$(window).scroll(function() {
// When scrolling to 100 pixels above the bottom, load new content
If ($(document).height() - $(this).scrollTop() - $(this).height() < 5) {
        loadMore();
};
});



fy = 0;
function loadMore() {
fy++;
//alert(fy);
$.getJSON("index.php?m=index&a=data&page=" + fy + "&rand=" + Math.random(), function(json) {

for (var i = 0; i <= json.length - 1; i++) {
                 //alert(json[i]['userName']); 
//content = '

' + json[i]['userName'] + '

' + json[i]['content'] + '

' + getLocalTime(json[i]['time']) + '

';  
            //content='

'  
            //alert(content);  
            $("div #liuyan").append(createTag(json[i]['userName'],json[i]['content'],json[i]['time'])); 
            loadHiglight(); 
        }; 
 
    }); 
} 
 
function loadHiglight() {//为了ajax后重载特效  
    $user = $("div .user"); 
    $text = $("div .text"); 
 
    $("div .content").each(function(index) { 
        $(this).mousemove(function() { 
 
            $user.eq(index).css("color", "#0A8CD2"); 
 
            //  $user.eq(index).css("background","#FFE6AD");  
            //  $text.eq(index).css("background","#FFFDF6");  
 
        }).mouseout(function() { 
 
            $user.eq(index).css("color", "#000"); 
 
            //  $user.eq(index).css("background","#E6F0F9");  
            //  $text.eq(index).css("background","#F8FBFD");  
        }); 
    }); 
} 
function createTag(usetName, content, time) { 
    var strTag = '

' + usetName + '

' + content + '

' + getLocalTime(time) + '

'; 
    return strTag; 
} 
function getLocalTime(nS) { 
    return new Date(parseInt(nS) * 1000).toLocaleString().replace(/:\d{1,2}$/, ' '); 
} 

// JavaScript Document
$(document).ready(function(e) {
 loadHiglight();//载入高亮特效

 $("#submit").click(function() { //“留言”按钮单击事件
  //获取用户名称
  var strUsetName = $("#userName").val();
  //获取输入留言内容
  var strContent = $("#content").val();
  //获取输入邮箱
  var strEmail = $("#email").val();

  //开始发送数据
  $.ajax({
   url: 'index.php?m=index&a=add',
   type: 'POST',
   dataType: 'json',
   data: {
    userName: strUsetName,
    content: strContent,
    email: strEmail
   },
   success: function(json, textStatus, xhr) {
    if (json.state=='ok') {
     alert('操作提示，留言成功！'); 
     //alert();
     var data=json.data[0];
     var strTag=createTag(data.userName,data.content,data.time);

     $(strTag).prependTo('div #liuyan');

      //$("Hello World!").prependTo("p");
    }else{
     alert('操作提示，留言失败！\n错误信息:'+json.error); 
    }
   }
  })
 });
 //动态载入留言
 loadMore();
});

//监视滚动条滚动
$(window).scroll(function() {
 // 当滚动到最底部以上100像素时， 加载新内容
 if ($(document).height() - $(this).scrollTop() - $(this).height() < 5) {
  loadMore();
 };
});

 

fy = 0;
function loadMore() {
 fy++;
 //alert(fy);
 $.getJSON("index.php?m=index&a=data&page=" + fy + "&rand=" + Math.random(), function(json) {

  for (var i = 0; i <= json.length - 1; i++) {
   //alert(json[i]['userName']);
   //content = '

' + json[i]['userName'] + '

' + json[i]['content'] + '

' + getLocalTime(json[i]['time']) + '

';
   //content='

'
   //alert(content);
   $("div #liuyan").append(createTag(json[i]['userName'],json[i]['content'],json[i]['time']));
   loadHiglight();
  };

 });
}

function loadHiglight() {//为了ajax后重载特效
 $user = $("div .user");
 $text = $("div .text");

 $("div .content").each(function(index) {
  $(this).mousemove(function() {

   $user.eq(index).css("color", "#0A8CD2");

   // $user.eq(index).css("background","#FFE6AD");
   // $text.eq(index).css("background","#FFFDF6");

  }).mouseout(function() {

   $user.eq(index).css("color", "#000");

   // $user.eq(index).css("background","#E6F0F9");
   // $text.eq(index).css("background","#F8FBFD");
  });
 });
}
function createTag(usetName, content, time) {
 var strTag = '

' + usetName + '

' + content + '

' + getLocalTime(time) + '

';
return strTag;
}
function getLocalTime(nS) {
return new Date(parseInt(nS) * 1000).toLocaleString().replace(/:d{1,2}$/, ' ');
}The request method is

[php] function data()
{
//Introducing paging class
Include "page.class.php";
//Get the number of data in the data table
$rows = $this->db->count('select * from data');
//Create paging object
$page = new Page($rows, 5, "");
$list=$this->db
->order('id DESC')
//->table('data')
->limit($page->getLimit())
->select();
/*
echo "

";<br>
var_dump($list);<br>
echo "

";
*/
echo json_encode($list);
exit();
}

function data()
{
//Introduce paging class
Include "page.class.php";
//Get the number of data in the data table
$rows = $this->db->count('select * from data');
//Create paging object
$page = new Page($rows, 5, "");
$list=$this->db
->order('id DESC')
//->table('data')
->limit($page->getLimit())
->select();
/*
echo "

";<br>
var_dump($list);<br>
echo "

";
*/
echo json_encode($list);
exit();
}
In this way, the waterfall flow effect is achieved. The disadvantage is that if it is loaded to the end, there is no prompt, hahahaha,

[php] function add(){
//After adding, return the number of affected items. If it is greater than 0, it means the addition is successful
               $json['state']='no';
If (empty($_POST['userName'])) {
                    $json['error']='No username entered';

              }elseif(empty($_POST['content'])){
                   $json['error']='No message content entered';

               }elseif(empty($_POST['email'])){
                  $json['error']='No email entered';

              }else{
isset($_POST['content'])?$_POST['content']=nl2br($_POST['content']):"";
                    $_POST['time']=time();
If($this->db->data($_POST)->add()>0){
                       /*
echo "Added successfully";
                                          // echo "<script>location.reload()</script>";//Prevent repeated submission of the refreshed form
Header("HTTP/1.1 303 See Other");
                     Header("Location: "); //Redirect to the root directory
exit;
                                                                                            $json['state']='ok';
                       $json['data']=$this
->db
->table('data')
->where('id='.$this->db->last_insert_id())
->select();
                                                                                                                                                                                       $json['error']=$this->db->error();
//die($this->db->error());//Add failure output error message
                                                                                                                                                                                                                                 echo json_encode($json);
                    //var_dump($_POST); 
         } 

function add(){

//After adding, return the number of affected items. If it is greater than 0, it means the addition is successful

$json['state']='no';
If (empty($_POST['userName'])) {
$json['error']='No username entered';

}elseif(empty($_POST['content'])){

$json['error']='No message content entered';

}elseif(empty($_POST['email'])){

$json['error']='No email entered';

}else{

isset($_POST['content'])?$_POST['content']=nl2br($_POST['content']):"";

$_POST['time']=time();
If($this->db->data($_POST)->add()>0){
/*
echo "Added successfully";
//echo "<script>location.reload()</script>";//Prevent repeated submission of the refreshed form
Header("HTTP/1.1 303 See Other");
Header("Location: "); //Redirect to the root directory
exit;
*/
$json['state']='ok';
$json['data']=$this
->db
->table('data')
->where('id='.$this->db->last_insert_id())
->select();
}else {
       
$json['error']=$this->db->error();
//die($this->db->error());//Add failure output error message
}  
}
echo json_encode($json);
//var_dump($_POST);
}This is the code for the message part, haha, so that you can see the effect directly on the page after leaving a message without refreshing the browser. The effect is much more beautiful. jquery+ajax is awesome. Haha

2. PHP functions learned today

[php]  json_encode();

说明

string json_encode ( mixed $value [, int $options = 0 ] )

Returnvalue JSON form of value< ;/P>

empty() If the value is empty, return True, returns false if there is a value,

time() Get timestamp

mysql_insert_id() returns the last operation increment Field id

json_encode(); Description string json_encode ( mixed $value [, int $options = 0 ] ) returns the JSON form of value empty() If the value is empty, it returns true, if there is a value, it returns false,
time() gets timestamp
mysql_insert_id() returns the id of the incremented field in the last operation

3. The javascript function we learned today, this function is used to convert timestamps.

[javascript] function getLocalTime(nS) {
Return new Date(parseInt(nS) * 1000).toLocaleString().replace(/:d{1,2}$/, ' ');
}
jquery's append() is used to load the last HTML
in the tag
prependTo() loads HTML code to the front of the tag

function getLocalTime(nS) {
return new Date(parseInt(nS) * 1000).toLocaleString().replace(/:d{1,2}$/, ' ');
}
jquery's append() is used to load the last HTML

within the tag

prependTo() loads HTML code to the front of the tag

4. The experience gained today is that after ajax loads a web page tag, the jquery special effects will disappear. Therefore, after ajax loads a web page tag, jquery events and functions must be re-bound. Otherwise, the special effects will be lost.

[javascript]

<PRE class=javascript name="code">

http://www.bkjia.com/PHPjc/477418.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/477418.htmlTechArticleOkay, let’s take a look at the picture above. This is an ajax message board. It has a waterfall flow effect, ha 1 .Today I learned jquery’s ajax and went directly to the code [php] / JavaScript Document $(document).ready(function(e...

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