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  • PHP session security best practices
    PHP session security best practices
    To ensure the security of Session in PHP, the following measures must be taken: 1. Use a strong random SessionID and enable strict mode; 2. Enable HTTPS and set the Secure and HttpOnly flags; 3. Change the SessionID regularly; 4. Prevent SessionFixation and Hijacking. Specific practices include configuring session.entropy_file and session.use_strict_mode, checking the ID legality before session_start(), setting cookie parameters to ensure HTTPS transmission and prohibiting JS access, and calling session_regen after logging in
    PHP Tutorial . Backend Development 704 2025-07-09 02:06:21
  • how to create an associative php array
    how to create an associative php array
    The key to creating an associative array in PHP is to use strings as keys. 1. You can directly assign values ??to create using square brackets or array() functions, such as $user=['name'=>'Tom','age'=>25]; 2. You can also add elements dynamically, such as $user['gender']='male'; 3. You can also generate results through database query, such as using PDO's fetchAll(PDO::FETCH_ASSOC) method; common errors include spelling errors in key names, not adding quotes, and duplication of key names, resulting in overwriting of values.
    PHP Tutorial . Backend Development 785 2025-07-09 02:05:40
  • What is the Difference Between `die()` and `exit()` in PHP?
    What is the Difference Between `die()` and `exit()` in PHP?
    InPHP,die()andexit()arefunctionallyidentical.1.Bothfunctionsterminatescriptexecutionimmediately.2.Theycanacceptastringmessageoranintegerstatuscodeasanargument,wherestringsareoutputtedbeforeterminationandintegerssettheexitstatus.3.die()istechnicallyan
    PHP Tutorial . Backend Development 270 2025-07-09 02:03:41
  • how to export a php array to a csv file
    how to export a php array to a csv file
    ToexportaPHParraytoCSV,usefputcsvwithproperheaders.1.Usefputcsvtohandleformatting,includingcommasandspecialcharacters.2.Forbrowserdownload,setheaders:Content-Type:text/csvandContent-Disposition:attachment;filename=export.csv.3.Whensavingserver-side,r
    PHP Tutorial . Backend Development 330 2025-07-09 01:46:01
  • How to mock a global PHP function in PHPUnit?
    How to mock a global PHP function in PHPUnit?
    In PHPUnit, you can mock global functions by namespace overlay, PHPTestHelpers extension, or encapsulating global functions as classes. 1. Use namespace: Rewrite the function under the same namespace as the code under test, which is only suitable for non-global calls; 2. Use PHPTestHelpers extension: Replace any global function through override_function(), but need to modify the php.ini configuration; 3. Encapsulate it as a class and dependency injection: encapsulate the global function into the class and use it through dependency injection. This class can be directly mocked during testing. This method is easier to maintain and comply with design principles.
    PHP Tutorial . Backend Development 241 2025-07-09 01:43:12
  • How to return a Generator from a PHP function?
    How to return a Generator from a PHP function?
    In PHP, use the yield keyword to make the function return to the generator. 1. Using yield in the function will automatically become a generator function and return the Generator object; 2. The final value can be set through return and obtained with getReturn(); 3. PHP8.1 can explicitly declare the return type as Generator; 4. Use yieldfrom to call multiple generators in nested manner. These features make the creation and management of generators more convenient.
    PHP Tutorial . Backend Development 745 2025-07-09 01:33:21
  • PHP mb_substr example
    PHP mb_substr example
    mb_substr is the correct choice to avoid garbled code when dealing with multi-byte characters such as Chinese. 1. It intercepts by characters rather than bytes to ensure that Unicode characters such as Chinese characters are not split; 2. It is recommended to clearly specify the encoding as UTF-8 when using it to avoid system differences; 3. It can combine functions such as mb_strlen and mb_strpos to achieve more reliable string operations; 4. Older versions of PHP need to enable mbstring extension, otherwise it may not work properly.
    PHP Tutorial . Backend Development 976 2025-07-09 01:27:11
  • How to change the session save path in PHP?
    How to change the session save path in PHP?
    To modify the session saving path of PHP, there are two methods: 1. Modify session.save_path in php.ini to implement global settings; 2. Use session_save_path() to set dynamically in the code. The first method requires editing the php.ini file, finding and modifying session.save_path to the specified directory, restarting the server after saving, and ensuring that the directory exists and has read and write permissions; the second method is suitable for a single application, using session_save_path() to set the absolute path before calling session_start(), which does not affect other projects. Notes include: Make sure the path is correct and readable
    PHP Tutorial . Backend Development 902 2025-07-09 01:19:01
  • Describe the Purpose of Traits in PHP
    Describe the Purpose of Traits in PHP
    In PHP, traits are used to solve the problem of code reuse between unrelated classes. When multiple unrelated classes need to share the same behavior, public methods can be encapsulated into trait and introduced with use to avoid inheritance redundancy or code replication; its advantage is to break through the PHP single inheritance limit and realize multi-source method inclusion; but abuse should be avoided to prevent increased maintenance difficulty.
    PHP Tutorial . Backend Development 344 2025-07-09 01:17:21
  • is it necessary to use a php framework
    is it necessary to use a php framework
    Whether or not the PHP framework is necessary depends on project requirements and development habits. For medium and large projects, using frameworks can improve code quality and save development time because frameworks provide standardized structures (such as MVC mode), built-in common functions (such as database operations, routing, authentication), enhanced security (such as anti-SQL injection), and integrated auxiliary tools (such as cache, queues). 1. The advantages of the framework include: standardizing code structure, improving maintenance, accelerating development speed, enhancing security, and integrating common functions. 2. The situation where the framework is not used is: small or one-time project, high-performance requirements scenarios, and basic skills practice during the learning stage. 3. Use the framework to pay attention to: learning costs are high, flexibility is limited, and performance overhead is present. It is recommended to choose appropriate based on the project size and personal ability.
    PHP Tutorial . Backend Development 365 2025-07-09 01:08:11
  • php get day name from date
    php get day name from date
    Getting the day of the week corresponding to a date in PHP can be achieved by using functions such as date() and strftime(). 1. Use the date() or strftime() function to get the week name directly from the timestamp, such as date('l',$timestamp) returns the full week name, date('D',$timestamp) returns the abbreviation, and strftime('%A',$timestamp) returns the localized week name according to the system locale settings. 2. The Chinese week name can be used through setlocale (LC_TIME,'zh_CN.UTF-8') and then used with strftime(), or
    PHP Tutorial . Backend Development 498 2025-07-09 01:05:10
  • Explain the Difference Between `==` and `===` Operators in PHP
    Explain the Difference Between `==` and `===` Operators in PHP
    In PHP, the main difference between == and == is the strictness of type checking. The == operator performs type conversion when comparing, while === strictly checks the values ??and types without conversion. For example: "5"==5 returns true but "5"==5 returns false; 0==false is true but 0===false is false; null===0 is always false. You should use == when the type is independent or requires flexible comparison, such as user input processing; if the type must be consistent, such as the detection function returns false, validation null or boolean flag. It is recommended to use === first to avoid logic caused by type conversion
    PHP Tutorial . Backend Development 208 2025-07-09 01:03:01
  • how to connect a php framework to a mysql database
    how to connect a php framework to a mysql database
    ToconnectaPHPframeworktoMySQL,firstsetupthedatabasewithtoolslikephpMyAdminorthecommandlinebycreatingadatabaseanduserwithproperprivileges.Next,updatetheframework’sconfigurationfile—like.envinLaravel,database.phpinCodeIgniter,ordoctrine.yamlinSymfony—w
    PHP Tutorial . Backend Development 767 2025-07-09 00:42:21
  • How to call a namespaced function in PHP?
    How to call a namespaced function in PHP?
    There are three ways to call namespace functions in PHP: using fully qualified names, importing through use statements, or calling directly within the same namespace. 1. When using a fully qualified name, you need to add a backslash before the namespace, such as \Utilities\Text\format("hello"); 2. After importing through usefunctionUtilities\Text\format; you can directly call format("world"), or you can use alias such as usefunctionUtilities\Text\formatText; to call formatTe
    PHP Tutorial . Backend Development 774 2025-07-09 00:40:01

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