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- How to configure PHP.ini file?
- To modify the PHP.ini configuration, you need to pay attention to the core parameters and adjust them as needed. 1. Error report on the development environment: error_reporting=E_ALL and display_errors=On, and errors are displayed in the production environment; 2. Upload file size limit is adjusted by upload_max_filesize, post_max_size and max_execution_time, such as set to 20M, 25M and 300 seconds; 3. Memory and execution time limits can be appropriately relaxed, such as memory_limit=128M and max_execution_time=120 to avoid affecting performance; 4. Enable OPcache to improve
- PHP Tutorial . Backend Development 346 2025-06-25 00:54:40
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- What is return type declarations in PHP 7?
- ReturntypedeclarationsinPHP7enforcethetypeofvalueafunctionmustreturn.Byappendingacolonandatype(e.g.,:int,:string)afterafunctiondefinition,developersensurefunctionsreturnexpecteddatatypes,reducingbugsandimprovingclarity.Strictmode(declare(strict_types
- PHP Tutorial . Backend Development 613 2025-06-25 00:54:20
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- PHP environment setup: Composer installation and use
- Composer is PHP's package manager for automatically downloading and managing third-party libraries. It supports global or local installation, Linux/macOS is installed via the command line, and Windows uses the installer. When using it, you need to create a composer.json file. Common commands include: 1. Install dependency: composerinstall; 2. Add dependency: composerrequirepackage; 3. Update dependency: composerupdate; 4. Delete dependency: composerremovepackage. Be careful not to modify the vendor directory, submit the composer.lock file, and set up domestic images
- PHP Tutorial . Backend Development 335 2025-06-25 00:53:10
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- How to run PHP files on an Apache server?
- To run PHP files, you must first configure Apache and PHP, and then place the .php file in the Apache root directory to access. 1. Make sure that Apache is installed and run, and you can use XAMPP, WAMP or command to check the status and start it; 2. Install PHP and Apache modules and restart Apache, and use info.php to test whether it is effective; 3. Put the PHP file in the Apache root directory (such as /var/www/html/) and ensure that the permissions are correct; 4. Common problems include downloading files instead of execution, blank pages, 403 errors, 500 errors, etc., and you should check the module loading, display_errors settings, file permissions and log troubleshooting respectively.
- PHP Tutorial . Backend Development 880 2025-06-25 00:52:30
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- What are loops in PHP (for, while, do-while, foreach)?
- Loops in PHP are used to repeatedly execute code blocks when specific conditions are met. The main types include for, while, do-while, and foreach. 1. The for loop is suitable for cases where the number of loops is known. The structure includes initialization, conditions and incremental/decreasing expressions; 2. The while loop continues to run when the condition is true, suitable for scenarios where the number of loops is uncertain; 3. The do-while loop is similar to while, but it will execute the code block first and then check the conditions; 4. The foreach loop is specially designed for arrays and can automatically traverse each element, especially suitable for processing associative arrays or lists.
- PHP Tutorial . Backend Development 1047 2025-06-25 00:52:10
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- What are constant visibility in PHP 7.1?
- PHP7.1introducedconstantvisibilitytoallowaccesscontrolforclassconstants.Beforethisversion,allconstantswerepublicbydefault.Now,developerscanexplicitlysetconstantsaspublic,protected,orprivate.Publicconstantsremainaccessibleanywhere,protectedconstantsar
- PHP Tutorial . Backend Development 523 2025-06-25 00:39:10
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- How do I use object caching (e.g., Memcached, Redis) in PHP?
- TospeedupPHPapplicationsusingobjectcaching,useMemcachedorRedisbasedonyourneeds.1.ChooseMemcachedforsimplekey-valuecachingorRedisforcomplexdatatypesandpersistence.2.InstalltherespectiveserverandPHPextensions,thenenabletheminphp.ini.3.Useeitherextensio
- PHP Tutorial . Backend Development 148 2025-06-25 00:38:11
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- How do I deploy PHP applications to a production environment?
- DeployingaPHPapplicationtoproductionrequireschoosingtherighthosting,usingversioncontrol,securingtheapp,andoptimizingperformance.1.Chooseahostingenvironmentthatfitsyourapp’sneeds:sharedhostingforsimplicity,VPS/cloudforflexibility,orDocker/Kubernetesfo
- PHP Tutorial . Backend Development 827 2025-06-25 00:35:50
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- How do I use do-while loops to execute code at least once?
- Using a do-while loop ensures that the code block is executed at least once, as it checks the conditions at the end of the loop. 1. It is suitable for scenarios where code is executed unconditionally, such as user input verification, menu system display, and a full cycle of simulation process must be completed. 2. The syntax structure is to execute the code block first, and then determine whether the conditions are met to decide whether to loop again. 3. Common errors include forgetting the semicolon after while, misuse of do-while, resulting in complex logic, and infinite loops due to improper condition setting.
- PHP Tutorial . Backend Development 899 2025-06-25 00:29:40
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- What are properties and methods in PHP classes?
- The properties and methods of classes in PHP are the basis of object-oriented programming. Attributes are used to store the data of an object, such as $name and $email in $classUser; methods are used to define the behavior of an object, such as setName() and getName() are used to safely set and get property values. Best practices include: 1. Keep attributes private to avoid direct access; 2. Use getter and setter methods to control attribute operations; 3. Encapsulate related functions into methods; 4. Use type declarations to improve code robustness. Following these principles can improve the maintainability and reusability of your code.
- PHP Tutorial . Backend Development 704 2025-06-25 00:20:50
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- What is static return type in PHP 8?
- ThestaticreturntypeinPHP8meansthemethodisexpectedtoreturnaninstanceoftheclassit'scalledon,includinganychildclass.1.Itenableslatestaticbinding,ensuringthereturnedvaluematchesthecallingclass'stype.2.Comparedtoself,whichalwaysreferstothedefiningclass,an
- PHP Tutorial . Backend Development 966 2025-06-24 00:57:31
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- What is the difference between MySQLi and PDO in PHP?
- WhenchoosingbetweenMySQLiandPDOforPHPdatabaseconnectivity,thedecisiondependsonspecificprojectneeds.1.PDOsupportsmultipledatabases,makingiteasiertoswitchbetweenMySQL,PostgreSQL,orSQLitewithminimalcodechanges,whileMySQLiislimitedtoMySQLonly.2.Bothoffer
- PHP Tutorial . Backend Development 846 2025-06-24 00:56:31
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- What are void return types in PHP 7.1?
- VoidreturntypesinPHP7.1ensureafunctionmustnotreturnanyvalue,improvingcodeclarityandpreventingmisuse.1.Declaringafunctionwithvoidmeansitshouldnotreturnanythingmeaningful.2.Itcaneitherreturnnothingoruseanemptyreturntoexitearly.3.Returninganyvalue,inclu
- PHP Tutorial . Backend Development 799 2025-06-24 00:55:30
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- How do I execute SQL queries using PHP?
- Yes,youcanrunSQLqueriesusingPHP,andtheprocessinvolveschoosingadatabaseextension,connectingtothedatabase,executingqueriessafely,andclosingconnectionswhendone.Todothis,firstchoosebetweenMySQLiorPDO,withPDObeingmoreflexibleduetosupportingmultipledatabas
- PHP Tutorial . Backend Development 1057 2025-06-24 00:54:51
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