空类型的含义？

From [PHPdiscussion group] 2016-12-19 17:14:24 0  3  2311

mscms.qishouzhijia.com, a website made by self-taught thinkphp

I recently made a website using thinkphp by myself, and my colleagues would like to give me some advice. think...

From [PHPdiscussion group] 2021-03-29 15:54:33 0  0  2307

php 实时价格监控，后台数据库io很大，计算很慢，如何解决？

每小时要根据不同的种类的物品计算总量和总额（就是sql一句话），已经放后台算了。但是计算起来很慢很慢，如何提高这个速度？

From [PHPdiscussion group] 2016-11-16 13:59:07 0  7  2301

After PHPstorm is installed, the software settings cannot be opened.

Please help, no need to reinstall! I am a newbie

From [PHPdiscussion group] 2017-06-07 09:38:19 0  3  2296

一个账号同时只能在同一个设备上登陆

我用PHP实现一个账号只能同时在同一个设备登录，注意，不是同一个IP。之前是在MYSQL的表中加了个显示是否登录了的字段，若登录了设置为1，退出设置为0.但后来发现，强行关闭浏览器的时候就没办法把这个字段设置为0了！想了...

From [PHPdiscussion group] 2016-11-11 10:20:39 0  3  2296

Why do I keep getting the message that the variable is undefined: status?

I copied the teacher's code and it's the same.

From [PHPdiscussion group] 2018-07-17 17:22:27 0  3  2295

phpstudy installs php7.3

How does phpstudy install a customized php version, such as php7.3-x64, I installed it myself but phpstudy did...

From [PHPdiscussion group] 2019-06-06 15:10:49 0  1  2292

Garbled characters occur when using pack()

$str="31C5231BC21E055A854C76E5B5C5ABBBC412801280D59CEC736C27DB8376876575547DB29C67432D28BC38EA3BF50646531...

From [PHPdiscussion group] 2019-06-25 14:05:34 0  1  2291

实验举例第一个就在本地电脑运行失败，显示乱码...我是直接复制的...

<?php//声明变量$shouji$shouji = '为了苹果手机去卖肾';//在双引号中放$shouji 然后echo 一下是什么效果呢？$str = "$shouji 会不会显示呢...

From [PHPdiscussion group] 2017-03-08 16:04:56 0  1  2286

According to the teacher's code, a syntax error occurred: unexpected 'return' (T_RETURN)

My PHP version is 5.5.38. Baidu online said to switch the PHP version.

From [PHPdiscussion group] 2019-02-20 14:54:34 0  7  2281

IIS+php环境下执行exec、system函数后访问项目报出500错误

运行环境：IIS7.5    php5.4问题描述：首先项目调用上传接口，接口中有一段通过exec函数执行ffmpeg转码的代码(经测试，该代码注释后不会出现以下问题), 如下：  &nbs...

From [PHPdiscussion group] 2016-10-09 11:46:15 0  1  2274

Why can't I generate a QR code?

class Index{    public function index()    {      ...

From [PHPdiscussion group] 2019-03-20 10:27:41 0  1  2270

用TP如何将SESSION存入MYSQL呢？

ThinkPHP实现将SESSION存入MYSQL的方法

From [PHPdiscussion group] 2016-12-22 11:32:50 0  1  2270

Use the Amap browser to locate and drag the address and open it on WeChat on your mobile phone (it opens quickly with WIFI, but cannot be opened with 4G) Urgent! ?

The locally built mobile browser positioning and dragging address functions cannot be turned on on 4G, but WIF...

From [PHPdiscussion group] 2017-07-01 09:12:17 0  3  2265

How to watch internal videos

Why can’t I watch some videos, but only VIPs can watch them? So why is there no recharge page?

From [PHPdiscussion group] 2018-02-05 11:02:34 0  1  2258