Does PDO need to be installed in advance when using it?

Hello teacher, does PDO need to be installed or configured in advance when using it?

From [MySQLdiscussion group] 2019-08-03 18:05:50 0  2  1739

What is the default database password for mysql on php Chinese website?

What is the default database password for mysql on php Chinese website?

From [MySQLdiscussion group] 2017-07-10 22:21:05 0  2  1737

This code neither prompts an error nor can I see the result. Please tell me where the error is. Thank you!

<?php/**Use PDO to complete the database connection*/require 'pdo_conf.php';try{ $pdo = new PDO($dsn,$userN...

From [MySQLdiscussion group] 2019-08-01 20:48:35 1  7  1733

Database cannot be accessed

It was normal to use Navicat to connect to the database two days ago. After opening it today, I can no longer ...

From [MySQLdiscussion group] 2019-08-26 14:12:42 0  4  1732

Mysql database design - chat record table design

I would like to ask all the experts, how do you design the chat database? Those who have experience can talk a...

From [MySQLdiscussion group] 2020-04-21 12:12:14 0  2  1714

The page displays 404

According to the steps, there is no problem in writing the PHP file. When searching through the browser, NOT F...

From [MySQLdiscussion group] 2018-07-24 17:38:38 0  1  1709

The MYSQL database is always red and cannot run!

From [MySQLdiscussion group] 2017-10-15 11:06:04 0  4  1694

Log in to phpMyadmin and get an error: The requested URL /phpMyAdmin/ was not found on this server.

登录phpMyadmin 报错：http://localhost/phpMyAdmin/ The requested URL /phpMyAdmin/ was not found on this server.

From [MySQLdiscussion group] 2019-10-21 09:47:24 0  0  1693

mysql - sql 跨表基础查询问题（附带table图片）

首先附上两张表： product 表 quotation 表 问题： 检索对飞利浦的所有型号都有报价的经销商 请问如何能只使用sql语句查询出想要的结果。 如果是写php程序 我的思路是 查询出product所有飞利浦的...

From [MySQLdiscussion group] 2017-04-17 13:02:56 0  3  1693

Unable to insert data.

var_dump($num); The result is boolean false, which can be inserted by executing the sql statement directly in ...

From [MySQLdiscussion group] 2019-12-03 23:57:20 0  7  1689

经纬度坐标 - 经纬度在mysql数据库中如何存储？

有一个要求是不能用double类型，float类型也不能用。那么在mysql中使用什么样的类型存储经纬度比较合适呢？ 如果要存为varchar类型，php中两者该如何转换呢？如果存为int类型，是否要使用bigint，还...

From [MySQLdiscussion group] 2017-04-17 13:26:43 0  3  1688

Why is my host file empty?

Why is my host file empty?

From [MySQLdiscussion group] 2018-10-29 16:32:04 0  1  1668

请教阅读python的Requests源码的正确方法和顺序？

对于wget/curl/netstat/trouceroute/iptable这些linux网络命令和一些网络协议有一些基本的了解，现在想深入一点学习linux+python，想阅读Requests库的源码，大神们能不能...

From [MySQLdiscussion group] 2016-11-12 11:09:51 0  2  1663

Mysql database generally uses ID or user name for association

I am a front-end person, and I am exploring while working on a personal PHP project. I need to pass a user ID ...

From [MySQLdiscussion group] 2017-06-24 09:41:31 0  7  1657

Added header setting: header('Content-type:text/html;charset=uft-8'); error report

After it has been set through the function mysqli_set_charset($conn,'utf8'), add the header setting: header('C...

From [MySQLdiscussion group] 2019-10-21 13:58:59 0  1  1656