国产av日韩一区二区三区精品,成人性爱视频在线观看,国产,欧美,日韩,一区,www.成色av久久成人,2222eeee成人天堂

current location：Home > Technical Articles > Daily Programming > PHP Knowledge

  • Explain the difference between GET and POST request methods in php context.
    Explain the difference between GET and POST request methods in php context.
    UseGETtoretrievedatawithoutchangingserverstate,asitappendsdatatotheURL,isbookmarkable,andhassizelimits,whilePOSTsendsdatainthebody,hidessensitiveinfo,allowslargerpayloads,andisusedformodifyingserverdata.1.GETisidealforsearches,filters,orpaginationwhe
    PHP Tutorial . Backend Development 348 2025-07-09 02:37:20
  • PHP string to lowercase
    PHP string to lowercase
    PHP provides a variety of string to lowercase methods, suitable for different scenarios. 1. The strtolower() function is suitable for most English scenarios, converting uppercase letters to lowercase, but poor support for non-ASCII characters; 2. mb_strtolower() supports multilingual, more accurate processing of Unicode encoding, and suitable for special characters such as French and German; 3. You can clean spaces or symbols in combination with trim() or preg_replace() to generate slug format; 4. Use LOWER() to achieve fuzzy matching in database queries, pay attention to whether the index is case sensitive. For pure English systems, strtolower() is used, while for internationalization requirements, mb_strtolower() is used.
    PHP Tutorial . Backend Development 293 2025-07-09 02:34:50
  • which php framework is the fastest
    which php framework is the fastest
    Phalcon is the fastest PHP framework, followed by Laminas and Slim. Phalcon compiles in C extensions, with the highest performance; Laminas enables lightweight and flexibility by loading components on demand; Slim is suitable for building small APIs and services; while Laravel is not the fastest, its rich functionality and ease of use make it efficient and practical enough in most projects.
    PHP Tutorial . Backend Development 464 2025-07-09 02:30:31
  • What is the difference between PHP sessions and cookies?
    What is the difference between PHP sessions and cookies?
    The difference between Sessions and cookies is in the location of data storage and management. 1. Cookies are stored in the user's browser and can be viewed and modified, suitable for persisting non-sensitive data; 2. Session data is stored on the server, and only sending session IDs to the browser, suitable for storing sensitive information; 3. Cookies can exist for a long time by default, and the session usually ends with the browser's closing; 4. Use sessions to handle authentication and temporary tracking, and use cookies to remember user preferences; 5. In terms of security, sensitive cookie data must be encrypted, sensitive information should be avoided, session IDs should be protected, and HTTPS transmission should be enabled.
    PHP Tutorial . Backend Development 705 2025-07-09 02:18:01
  • how to fix undefined index in PHP
    how to fix undefined index in PHP
    When encountering the "undefinedindex" error in PHP, the solutions include: 1. Use isset() to determine whether the index exists and avoid directly accessing undefined keys; 2. Use array_key_exists() to check whether the key exists, which is suitable for situations where null values ??need to be distinguished; 3. Set default values ??for variables, such as using the empty merge operator?? to improve the simplicity of the code; 4. Turn on error reports to help locate problems. These practices can effectively prevent errors caused by accessing non-existent array keys, and improve code robustness and maintainability.
    PHP Tutorial . Backend Development 150 2025-07-09 02:08:21
  • PHP trim characters from a string
    PHP trim characters from a string
    PHP's trim() function can be used to remove whitespace characters or other specified characters at the beginning and end of a string. 1. By default, trim() removes spaces, tab characters (\t), line breaks (\n), carriage return characters (\r), empty bytes (\0), and vertical tab characters (\x0B); for example, trim("\n\tHelloWorld!\r\n") outputs HelloWorld! 2. The characters to be removed can be specified through the second parameter, such as trim("---HelloWorld!---","-") returns HelloWorld!, and supports multiple characters, such as trim(&
    PHP Tutorial . Backend Development 258 2025-07-09 02:06:40
  • 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 717 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 798 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 287 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 345 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 253 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 762 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 984 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 911 2025-07-09 01:19:01

Tool Recommendations

jQuery enterprise message form contact code

jQuery enterprise message form contact code is a simple and practical enterprise message form and contact us introduction page code.
form button
2024-02-29

HTML5 MP3 music box playback effects

HTML5 MP3 music box playback special effect is an mp3 music player based on HTML5 css3 to create cute music box emoticons and click the switch button.

HTML5 cool particle animation navigation menu special effects

HTML5 cool particle animation navigation menu special effect is a special effect that changes color when the navigation menu is hovered by the mouse.
Menu navigation
2024-02-29

jQuery visual form drag and drop editing code

jQuery visual form drag and drop editing code is a visual form based on jQuery and bootstrap framework.
form button
2024-02-29

Organic fruit and vegetable supplier web template Bootstrap5

An organic fruit and vegetable supplier web template-Bootstrap5
Bootstrap template
2023-02-03

Bootstrap3 multifunctional data information background management responsive web page template-Novus

Bootstrap3 multifunctional data information background management responsive web page template-Novus
backend template
2023-02-02

Real estate resource service platform web page template Bootstrap5

Real estate resource service platform web page template Bootstrap5
Bootstrap template
2023-02-02

Simple resume information web template Bootstrap4

Simple resume information web template Bootstrap4
Bootstrap template
2023-02-02

Cute summer elements vector material (EPS PNG)

This is a cute summer element vector material, including the sun, sun hat, coconut tree, bikini, airplane, watermelon, ice cream, ice cream, cold drink, swimming ring, flip-flops, pineapple, conch, shell, starfish, crab, Lemons, sunscreen, sunglasses, etc., the materials are provided in EPS and PNG formats, including JPG previews.
PNG material
2024-05-09

Four red 2023 graduation badges vector material (AI EPS PNG)

This is a red 2023 graduation badge vector material, four in total, available in AI, EPS and PNG formats, including JPG preview.
PNG material
2024-02-29

Singing bird and cart filled with flowers design spring banner vector material (AI EPS)

This is a spring banner vector material designed with singing birds and a cart full of flowers. It is available in AI and EPS formats, including JPG preview.
banner picture
2024-02-29

Golden graduation cap vector material (EPS PNG)

This is a golden graduation cap vector material, available in EPS and PNG formats, including JPG preview.
PNG material
2024-02-27

Home Decor Cleaning and Repair Service Company Website Template

Home Decoration Cleaning and Maintenance Service Company Website Template is a website template download suitable for promotional websites that provide home decoration, cleaning, maintenance and other service organizations. Tip: This template calls the Google font library, and the page may open slowly.
Front-end template
2024-05-09

Fresh color personal resume guide page template

Fresh color matching personal job application resume guide page template is a personal job search resume work display guide page web template download suitable for fresh color matching style. Tip: This template calls the Google font library, and the page may open slowly.
Front-end template
2024-02-29

Designer Creative Job Resume Web Template

Designer Creative Job Resume Web Template is a downloadable web template for personal job resume display suitable for various designer positions. Tip: This template calls the Google font library, and the page may open slowly.
Front-end template
2024-02-28

Modern engineering construction company website template

The modern engineering and construction company website template is a downloadable website template suitable for promotion of the engineering and construction service industry. Tip: This template calls the Google font library, and the page may open slowly.
Front-end template
2024-02-28