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Self-study IT network Linux load balancing video tutorial

Course Intermediate 11314

Course Introduction："Self-study IT Network Linux Load Balancing Video Tutorial" mainly implements Linux load balancing by performing script operations on web, lvs and Linux under nagin.

Shangxuetang MySQL video tutorial

Course Advanced 17628

Course Introduction："Shangxuetang MySQL Video Tutorial" introduces you to the process from installing to using the MySQL database, and introduces the specific operations of each link in detail.

Band of Brothers front-end example display video tutorial

Course Advanced 11330

Course Introduction："Brothers Band Front-end Example Display Video Tutorial" introduces examples of HTML5 and CSS3 technologies to everyone, so that everyone can become more proficient in using HTML5 and CSS3.

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When writing verification code in PHP, the online code editor can display it, but when placed on the local website, the code is garbled?

<?php check_code(); // Randomly generate characters or numbers for the verification code function check_code($width=100, $height=50,$num=4, $type='jpeg') {

2017-11-06 13:50:30

PHP delimited random number, non-repeating

I have the following php code which creates random numbers when adding a static number; 100 and divides the number with |. It works fine but creates duplicate numbers, how do I make it prevent duplicate numbers from being created? echoshd is 3;100|2;100, but there are no repeated numbers before ;100. But this code sometimes outputs numbers like 2;100|2;100, which are repeated. <?php$kat_list=array(1,2,3,4);$count_cat=rand(2,3);for($i=1;

2023-09-06 20:26:26

php - Reuse of tp3.2 templates

When using thinkphp3.2, most of the pages with additions, deletions, modifications and searches are basically similar. But it needs to be modified one by one, modifying the list fields, modifying the addition, and editing forms. Repeating the work needs to be done many times. Are there any good ideas for code reuse? My front-end form validation generally uses jquery's validate...

2017-07-03 11:41:24

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 work. Below is the code snippet of the server database initialization connector in the application fromfastapiimportFastAPIimportmysql.connectorapp

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 ContactName. I think this might be a nested query. Nested queries run fine in SQLServer, but don't know how to implement it in MySQL. Limit query: Select*fromcustomerslimit

2023-09-05 14:46:42

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PHP numbers and number operation verification code

Course Introduction：This article mainly introduces PHP numbers and number operation verification codes. Interested friends can refer to it. I hope it will be helpful to everyone.

2018-06-08 comment 0 2227

How to generate random numbers and verification codes using PHP arrays

Course Introduction：How to use PHP arrays to generate random numbers and verification codes Random numbers and verification codes are very common during the development of websites and applications. PHP provides various methods to generate random numbers and verification codes. This article will introduce how to use PHP arrays to generate random numbers and verification codes, with corresponding code examples. 1. Generate random numbers In PHP, we can use the rand() function to generate random numbers. The rand() function requires two parameters, the minimum value and the maximum value. The sample code is as follows: $min=1;$max=

2023-07-16 comment 0 1966

PHP encapsulation function to generate random string verification code

Course Introduction：This article mainly introduces the relevant information about using PHP encapsulation function to generate random string verification code. The article gives a detailed introduction of the sample code, which has certain reference value for everyone. Friends in need can learn together. study.

2017-02-03 comment 0 1483

access2007 verification code php verification code production network tree comment ideas

Course Introduction：access2007 verification code: access2007 verification code php verification code production network tree comment ideas: 1. Generate random numbers and use a for loop to determine how many random numbers are generated. Use a random function to generate random numbers within a range. For example, rand(1,15) generates a number between 1 and 15. Use the 16-bit base function to alphabetize the generated number. dechex(rand(1,15)). Use the .= operator to save several numbers. Put the generated random number into $_SESSION[variable]. Compare with user-submitted content in the future. 2. Create a picture and use the picture creation function to determine the size of the created picture. For example $im = imagecreatet

2016-07-29 comment 0 1546

Java implements a simple code to randomly generate mobile phone SMS verification codes

Course Introduction：This article mainly introduces the method of randomly generating mobile phone SMS verification codes in Java, and involves related techniques of Java mathematical operations to calculate random numbers and string operations. It has certain reference value. Friends who need it can refer to it.

2017-05-01 comment 0 2516

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