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c++ - Can functions with the same name with different parameters in a derived class be declared as virtual functions

When the base class and the derived class have functions with the same name, regardless of whether the number of parameters is the same or different, the subclass object will always directly call the function of the same name of the derived class. If you want to call the function of the same name of...

世界只因有你 2017-06-10 09:48:57 0  1  1441

Create unique ID based on value in row in MySQL

I'm creating a web application for a genealogy project. I want each person added to the database to have a unique ID based on the first 3 characters of their last name (for the sake of explanation, let's call it the "last name string"), with an auto-increment (from 00001 represents each un...

P粉541796322 2023-12-27 10:06:21 0  1  483

About chain calls in PHP

I encountered a problem when chaining calls with PHP: There is a class "Site" below: {code...} There is also a class "Api" located in "class.Api.php": {code...} Use the following code to instantiate: {code...} Then call the following code: {code...} Will PHP repeat requ...

天蓬老師 2017-06-19 09:07:08 0  2  979

Demonstrating SQL Virtual/Temporary Table Approach: Extracting Data from an Associative Array

I need a simple SQL query to display a virtual/temporary table without creating it in the database. I'm using PHP to create a query string with data. My current PHP code is: $array=[['id'=>1,'name'=>'one'],['id'=>2,'name'=>'two'],['id '=>3,'name'=>'three']];$subQuery="SELECT{$...

P粉066224086 2023-09-03 16:26:28 0  1  678

How to call sqlserver's paging stored procedure in php

How to call the paging stored procedure with return value when php connects to sqlserver using PDO method? ALTER PROC [dbo].[sp_PageView]@tbname varchar(128), ?--The name of the table to be displayed in pages @FieldKey varchar(1000), ?--Used to locate records

孤獨島 2021-11-05 13:52:01 0  2  872

Is removing the "+" character the correct thing to do when echoing $_GET variables in PHP?

I have a URL string similar to https://example.com/path/?welcome_screen=1&email_address=something+else@example.com In PHP I call <?phpecho$_GET['email_address'];?> This will produce somethingelse@example.com Specifically, the + in the email address is replaced with a space

P粉481815897 2023-09-09 19:18:32 0  1  613

Class library, how to use it, is there any detailed method?

My MySQL class library in PHP, after loading it with include, can only define variables. How to use the functions in it? It is useless to write the function name directly. Please give me a detailed method. Thank you.

哈哈哈哈。 2018-07-12 11:54:40 0  6  1387

lambda - java8 An object is arranged in the order of a certain field in the object

For example, I want to have a class User with attributes like this: private int age, private String name, several objects {code...} Now I want to sort them in ascending order of age, that is, the final display result of lisr is user1 user3 user2. How to write it using lambda expression in java8? thi...

歐陽克 2017-06-23 09:13:33 0  3  1169

How to use `exec` to execute a command with multiple steps in bash

I have a multi-step command that asks several questions along the way. I need to do it in code. phpcommand.php>What is your name? UserSmith>How old are you? 25>You are old enough! But when I call it with exec, it gets stuck. What I expect is: <?php$result=exec('phpcommand.php')->next(...

P粉659378577 2024-01-29 12:57:56 0  1  528

PHP Chinese website large-scale live broadcast public welfare free class registration post. . .

PHP Chinese website’s free public welfare live broadcast class in June is facing 6.18. Instead of frantically buying your hands, it is better to study quietly. We have carefully prepared two free live broadcast courses for you: 1. One-week introduction to Web front-end development 1. Course name: [X...

PHP中文網 2018-06-04 13:03:08 32  848  67219

Laravel Modal does not return data

I don't know why I'm not getting the value from the modal in my Laravel controller. Please check it for me. However, I use the same code for other modes and controllers. It's working and returning the value from the property without any issues. I'm using Laravel8 and php8.1; below is my code. app\Ht...

P粉174151913 2024-03-29 10:31:31 0  1  586

Can I use the automatic generation module of thinkphp5 in Windows 7 system? How to configure and use

明民 2017-10-10 17:04:14 0  2  1379

After installing the PHP toolbox, all the mysql tables in phpstudy that I installed before are gone. What should I do?

After installing the PHP toolbox, all the mysql tables in phpstudy that I installed before are gone. What should I do?

劉袁銘 2017-10-10 19:25:59 0  4  2935

mcrypt_get_key_size()

To use mcrypt_get_key_size() in php study, how to enable mcrypt_

劉袁銘 2017-10-10 19:47:34 0  1  1167

Detecting login status and preventing repeated login status in TP5 - My page is wrong

冥冥之中天注定 2017-10-10 22:49:15 0  0  1180

Issues with resending WeChat public account template messages?

For example: I am using PHP to develop WeChat public accounts. If I send a template message, the WeChat client may receive 1-3 messages. I checked Baidu and said that the WeChat server will resend in 5 seconds. How to solve this problem?

飛揚 2017-10-11 08:00:11 0  0  1137

How to install php7

我無限黑暗里的小太陽▼ 2017-10-11 09:11:44 0  1  1143

Solve (no language limit)

A census taker asked a woman, "How many children do you have and how old are they?" The woman replied, "I have three children. Their ages multiplied is 36. The sum of their ages is equal to the house number of the segregated room." Census The enumerator immediately went to the ne...

路過 2017-10-11 10:20:08 0  1  1359

There is no WWW file in the phpStudy directory. Enter localhost in the website and the hello world solution will come out directly! I created the WWW folder in the root directory and then created an abc.php. localhost/abc.php still didn't come out and an error was reported. not found

<?phpphpinfo();?>

M..moli瞎 2017-10-11 11:45:27 0  7  5206

Find an authoritative and practical development tutorial or article on WeChat scan code authorization to log in to the website

Find an authoritative and practical development tutorial or article on WeChat scan code authorization to log in to the website

極世 2017-10-11 12:33:15 0  1  1681