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First map          Implementation process: 1. The authorized login button and the body information are placed on the same page. The login button is displayed when the user is not authorized, the login button is hidden when the user is authorized, and the body information is displayed. Of course, the authorization and the body can be separat ...

ls command is one of the most commonly used commands in Linux. If you're right, the ls command is the first command the entrant uses to enter the Linux Box command prompt. We may not know or use all the available ls options, but we use ls commands frequently every day. In this article, we'll discuss the basic ls commands, and try to cover as ma ...

LNMP Deployment and Application Interpretation of LNMP Architecture The LNMP platform is a combination of Linux, Ngnix, MySQL and PHP.Architecture, requires Linux server, MySQL database, PHP parsing environment MySQL Installation Configuration For consistency with Nginx, PHP environments, here is the option to install MySQL components as sourc ...

Just learned the laravel queue, take notes. 1. First step configuration (. env) QUEUE_CONNECTION=database 2.database drive settings Step 1: generate jobs data migration table php artisan queue:table The effect is as follows:Step 2: create the jobs table and execute the migration command php artisan migrate The effect is as follows: 3. Simulatio ...

What is an algorithm?Isn't the equation unfamiliar?The correct unknown value is obtained by solving the equation.We can simply interpret solving equations as algorithms.Of course, the algorithm is more than that. Don't worry, I'll talk to you. Let's start with two pieces of code: Both pieces of code can be called algorithms because they solve ...

Recently, there is a need for the project to count PV, UV and IP of the website and display them to the background. So we can use the log of nginx. concept UV: independent visitors; based on cookie s, if a computer is equipped with three different browsers, opening the same page respectively, three UVs will be generated.PV: the number of visits ...

I saw a lot of codes that import millions of data into CSV files on the Internet. I tried them on my own. M ost of them will cause memory overflow due to too large data. I saw the use of PHP generator by chance and finally found a solution (the memory required is very small, about tens of meters is enough, depending on the range of ...

overviewFirst, synchronize the following project overview:The last article shared the routing Middleware - Jaeger link tracking (actual combat). The response is really unexpected. The "Go China" public number has also been forwarded. Many friends have exchanged with my friends, calling me a big God. Actually, I am a big God, but I hav ...

nested exception Before we learn about SPL exceptions, let's take a look at nested exceptions. As the name implies, nested exceptions are nested inside the Exception. An Exception is thrown, and an Exception is thrown after the catch arrives. In this case, nested exceptions can be obtained by the getPrevious method of the Exception base class; ...

Sketch The double linked list is an important linear storage structure. For each node in the double linked list, it not only stores its own information, but also stores the addresses of the predecessor and successor nodes. Abstract SplDoublyLinkedList implements Iterator , ArrayAccess , Countable { public __construct ( void ) ...