Backend Development
PHP Tutorial
Detailed explanation of the use of PHP magic methods __get() and __set()_PHP tutorial
Detailed explanation of the use of PHP magic methods __get() and __set()_PHP tutorial
Let’s take a look at the explanation in the official PHP documentation:
__set() is run when writing data to inaccessible properties.
__get() is utilized for reading data from inaccessible properties. What is the use of
How to translate it into Chinese?
inaccessible: n. Difficult to reach; difficult to approach; incomprehensible.
There is code and there is truth:
error_reporting(E_ALL);
class stu{
private $a;
private $b = 0;
public $c;
public $d = 0;
//Here private can be replaced by protected public
private function __get($name) {
return 123;
}
//private here can also be replaced by protected public
private function __set ($name, $value) {
echo "This is set function";
}
}
$s = new stu();
var_dump($s->a) ; //output: 123
var_dump($s->b); //output: 123
var_dump($s->c); //output: null
var_dump($s- >d); //output: 0
var_dump($s->e); //output: 123
$s->a = 3; //output: This is set function
$s->c = 3; //no output
$s->f = 3; //output: This is set function
?>
Result analysis:
If there is no __get method, executing var_dump($s->a) var_dump($s->b) will cause a fatal error
If there is no_ _get method, when executing var_dump($s->e), there will be a notice that the attribute $e is not defined
Summary:
1. Read from an inaccessible attribute When fetching data, the __get() method is called
2. When assigning a value to an attribute that is difficult to access, the __set() method is called
3. Inaccessibility includes: (1) private attributes, (2) Uninitialized attributes
4. __isset() __unset() is similar
Hot AI Tools
Undress AI Tool
Undress images for free
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
VSCode settings.json location
Aug 01, 2025 am 06:12 AM
The settings.json file is located in the user-level or workspace-level path and is used to customize VSCode settings. 1. User-level path: Windows is C:\Users\\AppData\Roaming\Code\User\settings.json, macOS is /Users//Library/ApplicationSupport/Code/User/settings.json, Linux is /home//.config/Code/User/settings.json; 2. Workspace-level path: .vscode/settings in the project root directory
go by example http middleware logging example
Aug 03, 2025 am 11:35 AM
HTTP log middleware in Go can record request methods, paths, client IP and time-consuming. 1. Use http.HandlerFunc to wrap the processor, 2. Record the start time and end time before and after calling next.ServeHTTP, 3. Get the real client IP through r.RemoteAddr and X-Forwarded-For headers, 4. Use log.Printf to output request logs, 5. Apply the middleware to ServeMux to implement global logging. The complete sample code has been verified to run and is suitable for starting a small and medium-sized project. The extension suggestions include capturing status codes, supporting JSON logs and request ID tracking.
edge pdf viewer not working
Aug 07, 2025 pm 04:36 PM
TestthePDFinanotherapptodetermineiftheissueiswiththefileorEdge.2.Enablethebuilt-inPDFviewerbyturningoff"AlwaysopenPDFfilesexternally"and"DownloadPDFfiles"inEdgesettings.3.Clearbrowsingdataincludingcookiesandcachedfilestoresolveren
Using PHP for Data Scraping and Web Automation
Aug 01, 2025 am 07:45 AM
UseGuzzleforrobustHTTPrequestswithheadersandtimeouts.2.ParseHTMLefficientlywithSymfonyDomCrawlerusingCSSselectors.3.HandleJavaScript-heavysitesbyintegratingPuppeteerviaPHPexec()torenderpages.4.Respectrobots.txt,adddelays,rotateuseragents,anduseproxie
Yii Developer: Mastering the Essential Technical Skills
Aug 04, 2025 pm 04:54 PM
To become a master of Yii, you need to master the following skills: 1) Understand Yii's MVC architecture, 2) Proficient in using ActiveRecordORM, 3) Effectively utilize Gii code generation tools, 4) Master Yii's verification rules, 5) Optimize database query performance, 6) Continuously pay attention to Yii ecosystem and community resources. Through the learning and practice of these skills, the development capabilities under the Yii framework can be comprehensively improved.
VS Code shortcut to focus on explorer panel
Aug 08, 2025 am 04:00 AM
In VSCode, you can quickly switch the panel and editing area through shortcut keys. To jump to the left Explorer panel, use Ctrl Shift E (Windows/Linux) or Cmd Shift E (Mac); return to the editing area to use Ctrl ` or Esc or Ctrl 1~9. Compared to mouse operation, keyboard shortcuts are more efficient and do not interrupt the encoding rhythm. Other tips include: Ctrl KCtrl E Focus Search Box, F2 Rename File, Delete File, Enter Open File, Arrow Key Expand/Collapse Folder.
Using HTML `input` Types for User Data
Aug 03, 2025 am 11:07 AM
Choosing the right HTMLinput type can improve data accuracy, enhance user experience, and improve usability. 1. Select the corresponding input types according to the data type, such as text, email, tel, number and date, which can automatically checksum and adapt to the keyboard; 2. Use HTML5 to add new types such as url, color, range and search, which can provide a more intuitive interaction method; 3. Use placeholder and required attributes to improve the efficiency and accuracy of form filling, but it should be noted that placeholder cannot replace label.
Fixed: Windows Update Failed to Install
Aug 08, 2025 pm 04:16 PM
RuntheWindowsUpdateTroubleshooterviaSettings>Update&Security>Troubleshoottoautomaticallyfixcommonissues.2.ResetWindowsUpdatecomponentsbystoppingrelatedservices,renamingtheSoftwareDistributionandCatroot2folders,thenrestartingtheservicestocle
