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Course Introduction：Use PHP to get a series of clues (horoscope, zodiac sign, birthday, etc.) from the ID number, PHP ID number. Use PHP to obtain a series of clues (zodiac sign, zodiac sign, birthday, etc.) from the ID number. PHP ID number The first example of this article shares with you PHP automatically obtains the corresponding ID number based on the ID number.

2016-07-12 comment 0  1129

Course Introduction：It is recommended to use the DateTime class to add a number of days to dates in PHP, with clear code and flexible functions. The DateTime class introduced in PHP5.2 supports object-oriented operations. The example code is: $date=newDateTime('2024-10-01'); $date->modify('5days'); echo$date->format('Y-m-d'); The output result is 2024-10-06; this method is highly readable and supports time zone setting and formatting output. You can also use strtotime() to implement it, but you need to pay attention to the time zone problem. The example is: $newDate=date("

2025-07-05 comment 0  771

Course Introduction：1. Use performance analysis plug-in to quickly locate problems. For example, QueryMonitor can view the number of database queries and PHP errors, BlackboxProfiler generates function execution reports, and NewRelic provides server-level analysis; 2. Analyzing PHP execution performance requires checking time-consuming functions, debugging tools usage and memory allocation, such as Xdebug generates flame graphs to assist in optimization; 3. Monitor database query efficiency can be checked through slow query logs and index checks, QueryMonitor can list all SQL and sort by time; 4. Combining external tools such as GooglePageSpeedInsights, GTmetrix and WebPageTest to evaluate front-end plus

2025-07-07 comment 0  424

Course Introduction：beforeAction() is used in Yii2 to run logic before the controller action is executed. If permission checks or requests modification, it must return true or parent class call to continue execution; afterAction() is run after the action is executed and before the response is sent, which is suitable for output modification or logging. 1.beforeAction() is run before the action is executed, and can be used for user permission verification. For example, redirecting the unlogged user to the login page, you need to return parent::beforeAction($action) or true to continue the process, otherwise the action execution will be prevented; 2. You can skip the check of a specific action by checking $action->id; 3. AfterAc

2025-07-02 comment 0  803

Course Introduction：To convert the total number of seconds to the hour:minute:second format, PHP provides two common methods. The first is to use basic mathematical operations: obtain the hours by dividing by 3600, continue to calculate the minutes and seconds after taking the modulus, and finally format the output with sprintf(); the second is to use the DateInterval class to achieve object-oriented formatting with DateTime. If the time length of more than 24 hours is required, it is recommended to calculate the hour part by yourself to avoid the limit of %H to only display the number of hours within the day. For example, 90061 seconds can be converted to 25:01:01. Select the right method according to your needs to complete the conversion.

2025-07-04 comment 0  595

Course Elementary  13744

Course Introduction：Scala Tutorial Scala is a multi-paradigm programming language, designed to integrate various features of object-oriented programming and functional programming.

Course Elementary  82260

Course Introduction："CSS Online Manual" is the official CSS online reference manual. This CSS online development manual contains various CSS properties, definitions, usage methods, example operations, etc. It is an indispensable online query manual for WEB programming learners and developers! CSS: Cascading Style Sheets (English full name: Cascading Style Sheets) is an application used to express HTML (Standard Universal Markup Language).

Course Elementary  13130

Course Introduction：SVG is a markup language for vector graphics in HTML5. It maintains powerful drawing capabilities and at the same time has a very high-end interface to operate graphics by directly operating Dom nodes. This "SVG Tutorial" is intended to allow students to master the SVG language and some of its corresponding APIs, combined with the knowledge of 2D drawing, so that students can render and control complex graphics on the page.

Course Elementary  24578

Course Introduction：In the "AngularJS Chinese Reference Manual", AngularJS extends HTML with new attributes and expressions. AngularJS can build a single page application (SPAs: Single Page Applications). AngularJS is very easy to learn.

Course Elementary  27436

Course Introduction：Go is a new language, a concurrent, garbage-collected, fast-compiled language. It can compile a large Go program in a few seconds on a single computer. Go provides a model for software construction that makes dependency analysis easier and avoids most C-style include files and library headers. Go is a statically typed language, and its type system has no hierarchy. Therefore users do not need to spend time defining relationships between types, which feels more lightweight than typical object-oriented languages. Go is a completely garbage-collected language and provides basic support for concurrent execution and communication. By its design, Go is intended to provide a method for constructing system software on multi-core machines.