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  • What is never return type in PHP 8.1?
    What is never return type in PHP 8.1?
    TheneverreturntypeinPHP8.1indicatesthatafunctionwillnotreturncontroltothecalleratall.1.Itisusedwhenafunctionthrowsanuncaughtexception,callsexit()ordie(),entersaninfiniteloop,orpermanentlytransferscontrolelsewhere.2.Practicalusesincludeerrorhelperfunc
    PHP Tutorial . Backend Development 876 2025-06-26 05:02:11
  • What are the deprecated features in PHP, and how do I avoid them?
    What are the deprecated features in PHP, and how do I avoid them?
    When using modern PHP, you need to avoid old features for security and compatibility. 1. The old MySQL extension (such as mysql_connect) has been removed, and should be replaced with MySQLi or PDO that supports preprocessing statements; 2. The configuration options of register_globals and magic_quotes have been eliminated, and the input should be processed manually and global variables such as $_GET and $_POST should be used; 3. Multiple functions such as create_function(), ereg(), etc. have been deprecated and should be replaced with anonymous functions or preg_ functions; 4. The variables passed by reference in foreach need to be unset after the loop, or use the key to directly modify the array. Timely update codes can improve security
    PHP Tutorial . Backend Development 615 2025-06-26 04:44:11
  • What are the recommendations for online PHP editors?
    What are the recommendations for online PHP editors?
    ThebestonlinePHPeditorsincludeCodeanywhereforsetupandcollaborationwithcontainersupportandreal-timeteamwork,3v4l.orgfortestingcodeacrossPHPversions,andJDoodleorPaiza.IOforlightweightscriptingandlearning.1.CodeanywhereoffersPHP-readycontainers,supports
    PHP Tutorial . Backend Development 436 2025-06-26 04:42:10
  • What is dependency injection, and how do I use it in PHP?
    What is dependency injection, and how do I use it in PHP?
    Dependency injection (DI) is a design pattern used to improve code flexibility and testability. 1. It reduces coupling by providing dependencies from the outside rather than internal creation; 2. In PHP, DI is usually implemented through constructors or setter methods; 3. Using DI can improve testability, flexibility and separate concerns; 4. Dependencies can be automatically resolved through containers during actual use; 5. However, DI can not be used in simple scripts or performance-sensitive scenarios.
    PHP Tutorial . Backend Development 653 2025-06-26 04:16:11
  • How do I submit form data to a PHP script using the GET method?
    How do I submit form data to a PHP script using the GET method?
    To submit form data to a PHP script using the GET method, first create an HTML form with method="get", then obtain the data through the $_GET hyperglobal array in the PHP file, and finally pay attention to the limitations of the GET method. 1. When creating HTML forms, you need to set the method attribute to "get" and specify the action to point to the PHP file; 2. After submission, the data is attached to the URL in the form of a query string; 3. Use isset() to check whether the key exists in the PHP script, and use htmlspecialchars() to prevent XSS attacks; 4. Pay attention to the visible, length limitation, and suitable for use in the GET data.
    PHP Tutorial . Backend Development 864 2025-06-26 04:12:10
  • What are scalar type declarations in PHP 7?
    What are scalar type declarations in PHP 7?
    PHP7introducedscalartypedeclarationstoenforceparameterdatatypesinfunctions.1.Scalartypessupportedincludeint,float,bool,andstring.2.Scalartypedeclarationsoperateincoercivemodebydefault,wherePHPconvertsvaluestotheexpectedtypeifpossible.3.Strictmodeenfo
    PHP Tutorial . Backend Development 755 2025-06-26 02:28:10
  • How to run PHP files through a URL?
    How to run PHP files through a URL?
    To run PHP files through URLs, you must build a web server environment that can parse PHP. 1. Local testing can use integrated development packages such as XAMPP, WAMP or MAMP, put PHP files into the http://localhost/ file name, and run them when you access the http://localhost/ file name in the browser; 2. When deploying to a remote server, you need to purchase a virtual host or cloud server that supports PHP, upload the file to the website root directory and access it through the domain name or IP address; 3. Quickly test small pieces of code can be used for online platforms such as 3v4l.org or OnlinePHPFunctions.com, and can be executed without building an environment. The core is to ensure that the server is configured correctly and capable
    PHP Tutorial . Backend Development 491 2025-06-26 02:18:11
  • How do I store and retrieve data in cookies using PHP?
    How do I store and retrieve data in cookies using PHP?
    TostoreandretrievedataincookiesusingPHP,usethesetcookie()functiontostoreandthe$_COOKIEsuperglobalarraytoretrieve.1.Usesetcookie('name','value',expire,path,domain)tocreateacookiebeforeanyoutput.2.Accesscookiesvia$_COOKIE['name']onsubsequentrequests,ch
    PHP Tutorial . Backend Development 433 2025-06-26 01:24:21
  • How to execute PHP code online?
    How to execute PHP code online?
    There are three main ways to execute PHP code online. 1. Use an online PHP editor (such as 3v4l.org, onlinephp.io, JDoodle) to directly write and run scripts, which is suitable for temporary testing and teaching demonstrations; 2. Use multi-language online IDEs (such as Replit, paiza.IO) that support HTML/CSS/JS, which are suitable for testing front-end and back-end interaction functions, but pay attention to platform configuration restrictions; 3. Use cloud servers or sandbox environments (such as Codeanywhere, Gitpod), which is suitable for testing complex functions such as database connections, which require registration and have certain usage thresholds. Simple test recommended online editor, complete project recommended local environment.
    PHP Tutorial . Backend Development 800 2025-06-26 01:24:01
  • Use Laragon to quickly set up a PHP development environment
    Use Laragon to quickly set up a PHP development environment
    LaragonsimplifiesPHPdevelopmentsetuponWindowsbybundlingApache,MySQL,PHP,andtoolsintoonepackage.1)DownloadandinstallLaragon,choosingapathwithoutspaces.2)Launchtheappandstartallservices.3)Accesslocalhosttoconfirminstallationsuccess.4)Placeprojectfilesi
    PHP Tutorial . Backend Development 284 2025-06-26 01:22:41
  • How to run PHP files with VS Code?
    How to run PHP files with VS Code?
    Yes,youcanrunPHPfilesinVSCodebyfollowingthesesteps:InstallPHPlocallyusingXAMPP,php.net(Windows),Homebrew(macOS),orapackagemanager(Linux).Verifyinstallationviaterminalwithphp-v.InstalltheofficialPHPextensioninVSCodeforlanguagesupportanddebugging.RunPH
    PHP Tutorial . Backend Development 359 2025-06-26 01:19:40
  • How to quickly set up a PHP development environment on Windows
    How to quickly set up a PHP development environment on Windows
    HowdoyousetupaPHPdevelopmentenvironmentonWindows?InstallXAMPPorWAMPforanall-in-onesetup,avoidingmanualinstallationofindividualcomponents.2.PlacePHPprojectsinthehtdocs(XAMPP)orwww(WAMP)directorytomakethemaccessiblevialocalhost.3.TestPHPusingphpinfo()a
    PHP Tutorial . Backend Development 976 2025-06-26 01:18:11
  • How to install PHP development environment?
    How to install PHP development environment?
    There are three common ways to install the PHP development environment: 1. Quickly build with XAMPP, start Apache and MySQL after downloading and installing, and put files into the htdocs folder to access, which is suitable for beginners; 2. Manually install PHP web server, download PHP and configure php.ini, combine Apache or Nginx to set modules and document root directory, suitable for users who need customization; 3. Use Docker to build an isolated environment, define services, mount directories and mapping ports through docker-compose.yml, which is suitable for multi-project or multi-version requirements; common problems include PHP not executing, no-report errors, and version confusion. You can check the MIME type and enable display.
    PHP Tutorial . Backend Development 636 2025-06-26 01:16:00
  • What are the best practices for code deployment in PHP?
    What are the best practices for code deployment in PHP?
    Deploying PHP code requires clear, safe and controllable processes and can be rolled back quickly. Key points include: 1. Use Git to manage code, adopt branch strategies and pull specified tag deployment; 2. Automate the deployment process, improve consistency through scripts or CI/CD tools and add backup mechanisms; 3. Properly handle dependency management and environment differences, use composerinstall-no-dev and isolate sensitive configurations; 4. Improve logging and rollback mechanisms to ensure that problems can be quickly recovered.
    PHP Tutorial . Backend Development 273 2025-06-26 01:14:40

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