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PHP recursively completes infinite classification

$arr=array( array('id'=>1,'area'=>'local','pid'=>0), array('id'=>2,'area'=>'country','pid'=&g

拥抱 2020-02-19 16:59:28

tp5.1 How to add custom fields using getters?

I have a table that is a tree classification table. The up_id corresponds to the upper-level classification id. I just want to convert the up_id into the name of the upper-level classification when displaying it in the table. What should I do? I think it can be implemented using the model's getter, ...

清风 2020-02-08 11:07:50

How to implement infinite classification in Laravel7 and above

After studying the laravel7.28 framework on the PHP Chinese website, I don’t know how to implement infinite classification. Please let me know, teachers and students, thank you!

王文军 2020-11-24 13:41:47

TP5.1 How to implement navigation highlighting

At present, my method can only highlight the currently selected navigation when clicking on a certain category. However, when clicking on an article to view details, the ID value is still obtained, and the corresponding controller cannot be determined, which results in only determining the article. ...

Jackie 2019-07-16 23:15:36

How PHP interfaces actually change the behavior of classes

According to the PHP documentation, object interfaces allow you to create code that specifies which methods a class must implement without defining how those methods are implemented. So, the interface is like a class with predefined methods, which still need to be accessed using -> notation. Howe...

P粉289775043 2023-09-02 23:49:28

Unable to install php7.4-dev on Ubuntu 18.04

Trying to install the php7.4-dev extension, but I get the following error: E: Unable to locate package php7.4-devE: Unable to find any package via glob 'php7.4-dev'E: Unable to locate package php7.4-dev via regex dev' found any packages When I run aptshowphp, it shows up like this: Package: php vers...

P粉265724930 2023-08-31 15:06:53

How to implement infinite classification when PHP calls Java interface through SOAP?

約定 2017-10-26 10:17:37

Functional issues with table tr:first-child td

I use CSS and tables to place the fraction line between the numerator and denominator. For complex fractions, it doesn't work properly on Ant browser. Below is sample code used in the tryit editor showing the issue. There is an unwanted border below the letter C. But something like the coded letter ...

P粉590929392 2024-03-30 13:24:05

php - How to add methods to an instance?

{Code...} If there is already an instance of class A, how can this instance also use the test method? What should I do if class A cannot be modified in php and python? If possible, use other packages when writing php before. , you will encounter that the call result returned is already an instance o...

某草草 2017-06-29 10:07:59

How to select multiple classes with the same name in JS

I use PHP to dynamically render these lists I get from the database, each list has the same class and since I can't change it, it renders dynamically. I select these classes via JavaScript and create an event on click to open and close them using the hidden class. Now I have a problem, this event wo...

P粉005134685 2024-03-26 17:46:43

Is it possible to read and display the contents of a txt file every few seconds using HTML?

I have a txt file that is updated with new data every few seconds. It is stored and generated on the Raspberry Pi, which will also act as a server. I wish to add its content to the html code for display. It should update without manually reloading the page. Is there a way to do this? Maybe use AJAX,...

P粉529581199 2023-09-07 08:46:12

php laravel eloquent multi-level linkage loop laravel view output laravel infinite classification how to write loop

The following is the city model {code...} {code...} The print output data is as follows: associated subcategory $this->childrenCities. If there is a lower-level category, there will be childrenCities. If there is no childrenCities, null will be returned. {code...} { Code...} Currently this is...

PHP中文网 2017-05-16 16:55:30

How to implement infinite loop of parent-child components in Vue 2: use slots

I need to call a method of a child component from the parent component. However, something I'm doing in the child component seems to be causing an infinite loop. I've tried looking at other questions and while they seem to be solving a similar problem, I can't apply their exact pattern to the proble...

P粉128563140 2023-09-03 15:13:47

Does PHP 8.1 break the functionality of the inner class SoapClient?

While making a library that uses PHP's SoapClient and is PHP8.1 compatible, I ran into this problem: All properties of SoapClient are now private when they were public before. So things like getting the last soap fault ($soapClient->__soap_fault) are no longer possible. But if something goes wron...

P粉615886660 2023-12-12 22:52:40

Questions about loading css and js

Teacher, 10-2 Community front-end page_2 In this course, you used "/static/css/bootstrap.css" to load the style. Why did I get an error when I loaded it according to this path? The 'bootstrap.css' and 'js' files cannot be referenced correctly. Is the path defined in which configuration fil...

iUnicorn 2019-05-08 20:02:42

Sharing nw.js binaries with applications in subfolders: A guide to efficient distribution

So I've got the following problem: My project (this one) depends on two different nw.js applications bundled using web2exe. One of them is for setup and the other is GUI-less and should run in the background on startup. The second application also relies on nw to implement operations such as showing...

P粉465287592 2024-01-17 08:58:39

Preview of the teaching course on September 10, 2018: How to implement paging query data table and classification query for class encapsulation in PHP

Preview of the teaching content of the third online class of PHP Chinese website on September 10, 2018: 1. Teaching topic: How to use PHP to implement paging query data tables? Encapsulate classification queries into classes to achieve code reuse. For more detailed knowledge points, please pay atten...

藏色散人 2018-09-10 10:02:37

Create a trigger in a mysql stored procedure

I want to create a trigger in the process. But after some research I found this is not possible. Can you suggest me another way to achieve the following? (For some reason I can't share the exact data and query. Please refer to similar queries.) What I want I created a temporary table that contains t...

P粉197639753 2024-02-25 19:35:21

Scale SVG path and convert using mPdf

Hello, I have a problem with SVG. First, I put the SVG into HTML, with input type radio, the user can scale this SVG (by adding a width style attribute with a percentage value). But when I send it to mpdf (SVGs in JSON) it doesn't work. I then try to calculate the size on the pdf but I can't fit the...

P粉287726308 2023-08-16 17:57:54

How to create a dynamic CSS system in a Vue 3 application?

I'm developing an application that will be used by many different clients, but "themes" cannot be shared between clients because their color schemes are considered proprietary and confidential, although I know this sounds ridiculous. Now, the color is defined in the main App.vue component ...

P粉826283529 2024-01-07 19:49:37