1:连接数据库
conn.php文件
<?php
// 连接到 数据库
$servername = "域名和端口号";
$username = "root";
$password = "自己的数据库密码";
$dbname = "数据库名";
// 创建连接
$conn = new mysqli($servername, $username, $password);
$conn->select_db($dbname);
// 检测连接
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
} else {
$conn->query(\'set names utf8\');
}
//测试mysqli 是否可用
// $msg = phpinfo();
// echo $msg;
//关闭数据库
// $conn->close();
2:增加数据
<?php
include \'conn.php\'；//连接数据库的文件
$title = $_REQUEST[\'title\'];
$detail = $_REQUEST[\'detail\'];
$idea = $_REQUEST[\'idea\'];
wq_list(自己建立的数据库名) $sql = "insert into wq_list(wq_title,wq_details,wq_idea,submission_date) values(\'$title\',\'$detail\',\'$idea\',now());";
//自己建立的数据库里的数据表里的字段内容
$ret = $conn->query($sql);
//判断是否成功 if($ret > 0) {
echo \'{"msg":"success","flag":true}\';
} else {
echo \'{"msg":"failed","flag":false}\';
}
$conn->close();
?>
3:删除数据
<?php
include \'conn.php\';
$id = $_REQUEST[\'id\'];
$sql = "delete from wq_list where wq_id = $id";
$ret = $conn->query($sql);
if($ret > 0) {
echo \'{"msg":"success","flag":true}\';
} else {
echo \'{"msg":"failed","flag":false}\';
}
$conn->close();
?>
4:修改数据update
<?php
include \'conn.php\';
$title = $_REQUEST[\'title\'];
$detail = $_REQUEST[\'detail\'];
$idea = $_REQUEST[\'idea\'];
$sql = " update wq_list set wq_title = $title，wq_details=$detail where wq_sid=$sid,";
//update 表名 set 字段=值，字段=值 where sid = id值
$ret = $conn->query($sql);
if($ret > 0) {
echo \'{"msg":"success","flag":true}\';
} else {
echo \'{"msg":"failed","flag":false}\';
}
$conn->close();
?>
5:查询数据
<?php
include \'./base/connectDb.php\';
// header("Content-type: text/html; charset=utf-8");
$sql = "select * from wq_list order by wq_id ";
$result = $conn->query($sql);
$ret_arr = array();
if($result->num_rows >= 0) {
while($row = $result->fetch_assoc()) {
array_push($ret_arr,$row);
}
} else {
array_push($ret_arr,null);
echo \'{"msg":"error","flag":false}\';
die("error");
}
echo json_encode($ret_arr);
$conn->close();
?>
使用以上代码时需要：
1:在后台建立自己的数据库并且创建数据表，数据表包含前端页面所对应的字段名称
2:把域名，端口号，数据库密码，数据库名称，数据表名改为自己的
3:结合前端发送ajax 到后台发送数据和获取数据来使用