Add, delete, modify and query curd in PHP native SQL

Reprint https://blog.csdn.net/weixin_43993175/article/details/104961925

 

<?php
header("Content-type: text/html; charset=utf-8");

$ip = $_REQUEST['ip']; //ip
$time = time(); // Creation time 
$content = $_REQUEST['content']; // Content 

// Connect to database    database host Address   account number   password   Table name 
$conn = mysqli_connect("localhost", 'root', "root", 'bd');

// Query the database 
$sql = "select * from bd where ip = '$ip' order by id desc LIMIT 1";
$query = $conn->query($sql);
//$a=[];
while ($row = $query->fetch_array()) {
    echo $row['id'], '<br>';
    //array_push($a,$row);
}

// insert data 
$sql = "insert into bd (ip,time,content) value ('$ip','$time','$content')";
$result = mysqli_query($conn, $sql);

// Modifying data 
$sql = "UPDATE table_name SET field1=new-value1, field2=new-value2";
$result = mysqli_query($conn, $sql);
if(!$result)
{
    die(' Unable to update data : ' . mysqli_error($conn));
}

// Delete data 
$sql = "DELETE FROM runoob_tbl WHERE runoob_id=3";
$result = mysqli_query($conn, $sql);