简体中文（ZH-CN）English（EN）繁体中文（ZH-TW）日本語（JA）한국어（KO）Melayu（MS）Français（FR）Deutsch（DE）
Home
Article
Q&A
Course
Topic
Download
Game
Dictionary
Recent Updates

Home  >  Article  >  Backend Development  >  html completes front-end and back-end interaction with php+MySQL

html completes front-end and back-end interaction with php+MySQL

不言
不言Original
2018-05-08 09:36:2213422browse

1.php database connection and basic operation configuration
(1)php creates database [connection] (Related mysql video tutorial recommendation: "mysql tutorial")

语法：Object mysqli_connect("域名","DB账号","DB密码","DB库名")
例子：$con = mysqli_connect('localhost','root','','frankdb');

(2) Solution to garbled Chinese characters when inserting data into DB
Syntax: 

mysqli_query($con,"set names utf8");

Note: If the setting is successful, 1 will be returned. Depending on the actual situation, it is not necessary to save the returned result.
(3) Set the client and server to keep the character encoding consistent
Syntax: 

mysqli_query($con,"set character_set_client=utf8");
    mysqli_query($con,"set character_set_results=utf8");

(4) Execute sql statement

语法：$结果 = $DB连接->query(sql语句);
例子：var_dump($result = $con->query($sql));

2. Use basic sql statement [template]
a.Establish connection
b.Determine whether to connect
c.Set encoding
d.Create sql statement
eNumber of execution results
g.Patch results
h.jsonized return

<?php
//a.sql 查询语句
无条件查询，即直接写1即可
//$sql=&#39;select * from 哪张表 where 条件&#39;；
有条件查询，在where后面写出查询条件，如果多个条件需要用and 或or 来连接。
//$sql="select stuName from stud  where stuScore=&#39;100&#39; and stuGender=&#39;female&#39;";
//$sql="select stuName from stud  where stuScore=&#39;100&#39; or stuGender=&#39;female&#39;";
        $con=mysqli_connect(&#39;localhost&#39;,&#39;root&#39;,&#39;&#39;,&#39;studb&#39;)
        
         if($con){
               echo&#39;<pre class="brush:php;toolbar:false">&#39;;
               echo&#39;数据库连接成功，等待指令...&#39;;
               mysqli_query($con,&#39;set  names utf8&#39;);
               mysqli_query($con,&#39;set  character_set_client=utf8&#39;);
               mysqli_query($con,&#39;set  character_set_results=utf8&#39;);
               $sql="select * from stud where 1";
               $result=$con->query($sql);
               if($result>num_rows>0){
                         $info=[];
                   for($i=0;$row=$result->fet_assoc();$i++){
                                   $info[$i]=$row;
                     }
                     echo json_encode($info);
                  }
               }else{
                    echo&#39;<pre class="brush:php;toolbar:false">&#39;;
                    echo&#39;数据连接失败，请重新连接‘；
              }

b.Insert statement (add statement)
Two ways of writing: 

(1)$sql="insert into 表名（字段1，字段2，...)  values(值1，值2，...)";
(2)$sql=&#39;insert into 表名（&#39;值1’,&#39;值2&#39;,...)";
 $con=mysqli_connect(&#39;localhost&#39;,&#39;root&#39;,&#39;&#39;,&#39;studb&#39;);
                 if($icon){
                        echo&#39;<pre class="brush:php;toolbar:false">&#39;;
                        echo&#39;数据库连接成功，等待指令...&#39;;
                        mysqli_query($con, &#39;set names utf8&#39;);
                        mysqli_query($con, &#39;set character_set_client=utf8&#39;);
                        mysqli_query($con, &#39;set character_set_result=utf8&#39;);
                        
                        $sql="insert into  stud  stuName,stuGender,stuAge,stuNum,stuScore)values(&#39;lucy&#39;,&#39;female&#39;,&#39;14&#39;,&#39;123456789&#39;,&#39;90&#39;)";
                        $sql="insert into  stud  values(&#39;lucy&#39;,&#39;female&#39;,&#39;14&#39;,&#39;123456789&#39;,&#39;90&#39;)";
                        $result=$con->query($sql);
                            if($result){
                               echo&#39;添加成功&#39;;
                           }else｛
                               echo&#39;添加失败&#39;;
                         }

c. Modify statement (update statement) update

$sql="update  表名 set 字段1=‘新值1’，字段2=‘新值2’，... where  条件“；
$con=mysqli_connect(&#39;localhost&#39;,&#39;root&#39;,&#39;&#39;,&#39;studb&#39;);
   if($con){
                      
echo "<pre class="brush:php;toolbar:false">";
                echo "数据库连接成功，等待指令...";
                        mysqli_query($con, &#39;set names utf8&#39;);
mysqli_query($con, &#39;set character_set_client=utf8&#39;);
mysqli_query($con, &#39;set character_set_results=utf8&#39;);
$sql="update  stud  set  stuScore=&#39;100&#39; where stuName=&#39;lily&#39;";
$result=$con->query($sql);
var_dump($result);
  }else{
        echo "数据库连接失败！！！";
}

d. Delete statement delete

$sql="delete from 表名 where 条件“；
             $con=mysqli_connect(&#39;localhost&#39;,&#39;toot&#39;,&#39;&#39;;&#39;studb&#39; );
                        if($con){
echo "<pre class="brush:php;toolbar:false">";
echo "数据库连接成功，等待指令...";
//
mysqli_query($con, &#39;set names utf8&#39;);
mysqli_query($con, &#39;set character_set_client=utf8&#39;);
mysqli_query($con, &#39;set character_set_results=utf8&#39;);
//
$sql = "delete from stud where stuName=&#39;lucy&#39;";
$result = $con->query($sql);
var_dump($result);
}else{
echo "数据库连接失败！！！";
}
 
   ?>                      
                         
                         
                ajax & php
                         
         <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<span>姓名：</span><input type="text" class="stuName"><br/>
<span>性别：</span><input type="text" class="stuGender"><br/>
<span>年龄：</span><input type="text" class="stuAge"><br/>
<span>手机：</span><input type="text" class="stuNumber"><br/>
<span>分数：</span><input type="text" class="stuScore"><br/>
<button>增：将上述信息添加至数据库</button><br/>
<button>删：根据姓名删除指定的内容</button><br/>
<button>改：根据姓名修改指定的内容</button><br/>
<button>查：查询数据库中所有的内容</button>
<!-- 1.引入jquery框架 -->
<script src="jquery-1.12.3.min.js"></script>
<script>
$(&#39;button:eq(0)&#39;).click(function(){
//2.在想要和后台交互的时候，调用$.ajax()方法
//参数是JSON格式
$.ajax({
//3.ajax结构需要一系列参数支持
type:&#39;post&#39;,//get|post
url:&#39;http://127.0.0.1/day3/code/lesson6_ajax&php/lesson6_ajax&php.php&#39;,
dataType:&#39;json&#39;,
data:{
//data是post请求独有的，因为post请求才需要携带数据给后台
stuName:$(&#39;.stuName&#39;).val(),
stuGender:$(&#39;.stuGender&#39;).val(),
stuAge:$(&#39;.stuAge&#39;).val(),
stuNumber:$(&#39;.stuNumber&#39;).val(),
stuScore:$(&#39;.stuScore&#39;).val(),
},
//请求完成后，若收到后台返回的数据(收到响应response)，这个函数会被自动执行。
success:function(data){
console.log(data);
}
});
});
$(&#39;button:eq(1)&#39;).click(function(){
});
$(&#39;button:eq(2)&#39;).click(function(){
});
$(&#39;button:eq(3)&#39;).click(function(){
});
</script>
</body>
</html>
   <?php             
  
/*
1.内置对象
在php中内置了两个对象用来接收，前端发来的信息。
$_GET 和 $_POST
$_GET用于获取在前端通过get请求发来的信息
$_POST用于获取在前端通过post请求发来的信息
*/
echo json_encode($_POST);
?>                       
                         
        ajax select&php 
        
                   
                    <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<span>姓名：</span><input type="text" class="stuName"><br/>
<span>性别：</span><input type="text" class="stuGender"><br/>
<span>年龄：</span><input type="text" class="stuAge"><br/>
<span>手机：</span><input type="text" class="stuNumber"><br/>
<span>分数：</span><input type="text" class="stuScore"><br/>
<button>增：将上述信息添加至数据库</button><br/>
<button>删：根据姓名删除指定的内容</button><br/>
<button>改：根据姓名修改指定的内容</button><br/>
<button>查：查询数据库中所有的内容</button>
<script src="jquery-1.12.3.min.js"></script>
<script>
$(&#39;button:eq(0)&#39;).click(function(){
//判空操作
var stuNameValue = $(&#39;.stuName&#39;).val();
var stuGenderValue = $(&#39;.stuGender&#39;).val();
var stuAgeValue = $(&#39;.stuAge&#39;).val();
var stuNumberValue = $(&#39;.stuNumber&#39;).val();
var stuScoreValue = $(&#39;.stuScore&#39;).val();
if(
stuNameValue.length==0||
stuGenderValue.length==0||
stuAgeValue.length==0||
stuNumberValue.length==0||
stuScoreValue.length==0){
alert(&#39;任意某一个输入信息都不能为空！&#39;);
return;
}
$.ajax({
type:&#39;post&#39;,
url:&#39;http://127.0.0.1/day3/code/lesson7_html&php&mysql/lesson7_html&php&mysql.php&#39;,
dataType:&#39;json&#39;,
data:{
stuName:$(&#39;.stuName&#39;).val(),
stuGender:$(&#39;.stuGender&#39;).val(),
stuAge:$(&#39;.stuAge&#39;).val(),
stuNumber:$(&#39;.stuNumber&#39;).val(),
stuScore:$(&#39;.stuScore&#39;).val(),
},
success:function(data){
console.log(data);
if(data.msg==&#39;add success&#39;){
alert(&#39;添加成功&#39;);
}else{
alert(&#39;添加失败&#39;);
}
}
});
});
$(&#39;button:eq(1)&#39;).click(function(){
});
$(&#39;button:eq(2)&#39;).click(function(){
});
$(&#39;button:eq(3)&#39;).click(function(){
$.ajax({
type:&#39;get&#39;,
url:&#39;http://127.0.0.1/day3/code/lesson7_html&php&mysql/lesson7_select.php&#39;,
dataType:&#39;json&#39;,
success:function (data){
console.log(data);
},
error: function (err){
console.log(err);
}
});
});
</script>
</body>
</html>
     
                         
   <?php
//查询功能的后台php文件
$success = array(&#39;status&#39; => &#39;success&#39;);
$error = array(&#39;status&#39; => &#39;error&#39;);
$con = mysqli_connect(&#39;localhost&#39;,&#39;root&#39;,&#39;&#39;,&#39;studb&#39;);
if($con){
mysqli_query($con, &#39;set names utf8&#39;);
mysqli_query($con, &#39;set character_set_client=utf8&#39;);
mysqli_query($con, &#39;set character_set_results=utf8&#39;);
$sql = "select * from gradeonesheet where 1";
$result = $con->query($sql);
if($result->num_rows>0){
$info = [];
for($i=0; $row=$result->fetch_assoc(); $i++){
$info[$i] = $row;
}
//
echo json_encode($info);
}
}
?>             
<?php
//添加数据的
$success = array(&#39;status&#39; => &#39;OK&#39;);
$error = array(&#39;status&#39; => &#39;error&#39;);
$con = mysqli_connect(&#39;localhost&#39;,&#39;root&#39;,&#39;&#39;,&#39;studb&#39;);
if($con){
mysqli_query($con, &#39;set names utf8&#39;);
mysqli_query($con, &#39;set character_set_client=utf8&#39;);
mysqli_query($con, &#39;set character_set_results=utf8&#39;);
//
$stuName = $_POST[&#39;stuName&#39;];
$stuGender = $_POST[&#39;stuGender&#39;];
$stuAge = $_POST[&#39;stuAge&#39;];
$stuNumber = $_POST[&#39;stuNumber&#39;];
$stuScore = $_POST[&#39;stuScore&#39;];
$sql = "insert into gradeonesheet values(&#39;$stuName&#39;,&#39;$stuGender&#39;,&#39;$stuAge&#39;,&#39;$stuNumber&#39;,&#39;$stuScore&#39;)";
$result = $con->query($sql);
if($result){
$success[&#39;msg&#39;] = &#39;add success&#39;;
echo json_encode($success);
}else{
$error[&#39;msg&#39;] = &#39;add failed&#39;;
echo json_encode($error);
}
}else{
$error[&#39;msg&#39;] = &#39;database connect failed&#39;;
echo json_encode($error);
}
?>

Related recommendations:

php mysql develops the simplest online question bank and online question making system


The above is the detailed content of html completes front-end and back-end interaction with php+MySQL. For more information, please follow other related articles on the PHP Chinese website!

Statement：
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Previous article：PHP implements stack push and pop sequencesNext article：PHP implements stack push and pop sequences

Related articles

See more