需求

1. PHP连接数据库
2. 查询遍历所有数据

PHP连接数据库

//config.php文件内容
$database = "xx";
$dataname = "root";
$datapasswd = "xxx";
$datalocal = "localhost:3306";
//$dataport = "3306";
$con = mysqli_connect($datalocal,$dataname,$datapasswd,$database);
if(!$con){
    echo "数据库连接异常";
}
//设置查询数据库编码
mysqli_query($con,'set names utf8');

查询遍历所有数据

<?php
//连接数据库
include './inc/config.php';
//查询数据库
$query = 'select * from user';
$result1 = mysqli_query($con,$query);


//函数返回结果集中行的数量
if(mysqli_num_rows($result1)>0){
//mysqli_fetch_array以数组的形式返回，关联数组
while($row = mysqli_fetch_array($result1)){
       
    echo     
 "<center>
<table>
 <tr>
   <th>账号</th>
   <th>密码</th>
 </tr>
 <tr>
    <td>".$row['id']."</td>
   <td>".$row['name']."</td>
   <td>".$row['password']. "</td>
 </tr>
</table>
</center>";
 }      
}
//关闭数据库
 mysqli_close($con);
 ?>