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How to show loader of php page?

I have a bunch of .php pages, each corresponding to an html webpage. Each page takes about a minute or so to fully process and load. I want to show a loading image to the user when the page is fully loaded. I thought of a way logically like loading the image first and the main content stays hidden w...

P粉651109397 2024-01-10 16:52:02

javascript - Vue2 Ajax (axios) failed to update dom data via paging

Since in the project, the background data is sent to the front end at once, the front end needs to do some paging processing. Vue2+Axios is used to make ajax requests. Currently, the console.log of the backend data can be printed successfully, but it cannot be updated on the dom. html {code...} JS {...

PHP中文网 2017-06-24 09:44:12

How to add login verification to the backend templates on and off the website?

The website provides many templates for the backend management system, all of which are in HTML. I have only learned PHP jump verification. I would like to ask how to add login verification to HTML. It seems that PHP's $islogin cannot be added to the HTML file. Judging, the session cannot be read, s...

phpcn_u14927 2017-08-12 17:19:25

Add dynamic links to AJAX HTML tables generated by JavaScript

I'm using JavaScript to generate an HTML table to populate with data from an AJAX file. I want to dynamically add links in certain cells to myfile.php. I'll let PHP handle the request. Each cell should have a link, all linking back to my PHP file, something like: <ahref="myfile.php?data=cell...

P粉311464935 2023-09-15 11:20:12

How to insert specific string into page meta tag using JavaScript

I need this for SEO optimization. The website I'm working on has a small set of pages that are generated dynamically, but their metadata is very generic - even though these 5 (different) pages have relatively different content, their titles and descriptions are the same, and I want Avoid this situat...

P粉904191507 2023-09-16 20:17:07

How to force real-time display updates in javascript?

How can I get javascript to update my webpage in real time? It seems like my Chrome browser is putting all the processing work into the calculations required and then updating the web page. Below is the simplest test HTML file. I'd rather see sequential counting (rather than just jumping to the fina...

P粉148434742 2023-09-04 17:44:30

[Must-read for front-end job hunting] Selected front-end development interview questions and answers_HTML

What is the role of HTMLDoctype? How to distinguish between strict mode and mixed mode? What do they mean? (1) The <!DOCTYPE> declaration is located at the very beginning of the document, before the <html> tag. Tells the browser's parser what document type specification to use to parse t...

天蓬老师 2017-11-13 13:01:44

Why can't I get the entered value from $_POST?

Preface: I'm relatively new to PHP and HTML, so I apologize in advance if there are any obvious logic issues. Please feel free to point it out. I currently have a dropdown function on my HTML page that contains the values 1-4. After selecting one of the values, the corresponding number of text box...

P粉464113078 2023-09-06 17:12:23

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

Ways to fix issue 2003 (HY000): Unable to connect to MySQL server 'db_mysql:3306' (111)

I recently tried to containerize my FastAPIPython server (also for replication/doubling purposes). Before, I had just a MySQL server in a Docker container and everything was fine, but when I also made my web server a service, it couldn't connect to the MySQL server, so now the application doesn't wo...

P粉178132828 2023-09-05 11:18:47

Experiment with sorting after query limit

So this is my first question here, please forgive me if something is wrong. I'm trying to make a sort query based on constraints. So there is a Customers table with 90 records. I want to first perform a query limited to 3 records, and then sort the results of this query by a column called ContactNam...

P粉237125700 2023-09-05 14:46:42

CSS Grid: Create new row when child content overflows column width

I have a two column layout based on CSS grid. When the content of the second column exceeds 1fr I want to create a new row. As it currently stands, the content simply overflows the column. One requirement of this layout is that the items in the right menu column are in one row. I achieve this with: ...

P粉212114661 2023-09-05 15:18:28

PHP full text search functionality using AND, OR and NOT operators

Newbie question: I'm trying to implement a full text search on a search string using php and eloquent. $searchstring="+(victimsuspect)+crime-covid";$searchresult=RssItem::whereRaw("MATCH(description)AGAINST('$searchstring'INBOOLEANMODE)")->ge

P粉076987386 2023-09-05 15:06:32

Shortest way to convert all PHP types to string

I'm writing a general system that I hope can one day be applied to fields like medicine (i.e. it's "scientific"). I think the best way is to represent all the data in php with strings (true will be "true", false will be "false" and so on). The reason for this is that in...

P粉369196603 2023-09-05 15:34:44

How to get average of DATETIME column in MySQL while grouping by other columns

I'm creating and populating a MySQL table using the following query: SETtime_zone='+00:00';CREATETABLEtimestamp_n_datetime(idINT,timeDATETIME,avg_timeDATETIME);INSERTINTOtimestamp_n_datetime(id,time,avg_time)VALUES("1","2023-01-0310:

P粉460377540 2023-09-05 11:46:21

Multi-device (mobile phone) synchronization - React Native

I'm trying to create a Lightshow that will launch on all users' mobile devices at the same time (can have up to 2000-3000 users). All users will use the Internet (Wi-Fi or mobile data). In our FE we use Apollo for subscriptions and it works like a charm. But the problem is, user A can get subscribed...

P粉151466081 2023-09-05 11:58:38

Spades, Diamonds, Hearts, Clubs => styles do not change font color in Chrome for Android

In Google Chrome on Windows, the card suit symbols (spades, hearts, diamonds, clubs) are colored correctly using the "style" attribute. Unfortunately, the same page displayed in Google Chrome on Android does not display the colors I defined but uses the default black and red. (See the atta...

P粉896751037 2023-09-05 15:25:13

How to hide mui TextField label?

I'm developing a Nextjs app and I have a dashboard navigation bar built with mui that contains a notification that opens the notification box, which is built with regular HTML and CSS. dashboard-navbar.js: importNotificationBoxfrom"./notification-box/notification-box";//...exportconstDashb...

P粉239164234 2023-09-05 15:41:00