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  • What I Took From the State of Dev 2025 Survey
    What I Took From the State of Dev 2025 Survey
    State of Devs 2025 survey results are out! Sunkanmi Fafowora highlights a few key results about diversity, health, and salaries.
    CSS Tutorial . Web Front-end 285 2025-07-17 09:16:24
  • PHP check if post variable is set
    PHP check if post variable is set
    Check whether the POST variable is set in PHP, mainly using isset() function; 1. Use isset() to determine whether the variable has been declared and not null, which is suitable for checking whether the field exists, but cannot determine whether the content is empty; 2. If you need to verify whether the variable has actual content, you can combine it with the empty() function, which will detect "false values" including empty strings, 0, null, false, empty arrays, etc.; 3. For the processing of multiple POST parameters, you can loop through the field list to check whether it exists uniformly, and improve the simplicity and extensibility of the code; 4. In terms of security, it is recommended to use htmlspecialchars() to filter the input and combine the empty merge operator?? Avoid undefined searches.
    PHP Tutorial . Backend Development 820 2025-07-17 04:18:00
  • PHP Operators for Beginners
    PHP Operators for Beginners
    Mastering the commonly used operators of PHP can deal with most development scenarios, mainly including: 1. Arithmetic operators ( , -, , /, %) are used for mathematical calculations and support dynamic variable operations, but pay attention to the problems that may be caused by automatic type conversion; 2. Comparison operators (==, ===, !=, >
    PHP Tutorial . Backend Development 348 2025-07-17 04:17:41
  • Getting Started with PHP: Your First Steps
    Getting Started with PHP: Your First Steps
    TostartwithPHP,firstsetupalocalserverenvironmentusingtoolslikeXAMPPorMAMP,thenwriteabasicPHPscriptusingechotodisplaytext,andfinallyintegratePHPwithHTMLfordynamiccontent.1.ChooseatoollikeXAMPPforWindowsorMAMPforMactoinstallApache,MySQL,andPHP.2.PlaceP
    PHP Tutorial . Backend Development 577 2025-07-17 04:17:21
  • Working with Constants in PHP: Define and Const Syntax
    Working with Constants in PHP: Define and Const Syntax
    In PHP, there are mainly two ways to define constants: define() function and const keyword. define() is a runtime function that can dynamically define constants at any location; while const is a language structure processed in the compilation stage and must be used directly in global or in classes and cannot be placed in conditional statements, loops or functions. The difference between the two is mainly reflected in: 1. define() supports dynamic definition, suitable for situations determined based on configuration files; 2. const is suitable for use in class definition constants and namespaces, which are more readable and organized and have slightly better performance; 3. Const needs to pay attention to scope issues when defining constants, such as namespace prefixes that cannot be omitted; 4. Both do not support modifying defined values, but define()
    PHP Tutorial . Backend Development 331 2025-07-17 04:17:00
  • php array to string conversion notice
    php array to string conversion notice
    PHP reports "Arraytostringconversion" because arrays are used where strings are needed. Common reasons include direct output arrays, string splicing arrays, assignment of values without checking the type, and misuse of echo output var_dump content. Solutions include: 1. Use is_array() to check the variable type; 2. Use print_r() or var_export() to output the array; 3. Use cast to determine the type; 4. Specify the array key name to access the element; 5. Use implode() to merge the array elements. Preventive measures include: judging the type before output, turning on E_NOTICE error report, using IDE type prompts, and adding type declarations for function parameters.
    PHP Tutorial . Backend Development 156 2025-07-17 04:16:41
  • PHP Variable Scope Explained
    PHP Variable Scope Explained
    Common problems and solutions for PHP variable scope include: 1. The global variable cannot be accessed within the function, and it needs to be passed in using the global keyword or parameter; 2. The static variable is declared with static, and it is only initialized once and the value is maintained between multiple calls; 3. Hyperglobal variables such as $_GET and $_POST can be used directly in any scope, but you need to pay attention to safe filtering; 4. Anonymous functions need to introduce parent scope variables through the use keyword, and when modifying external variables, you need to pass a reference. Mastering these rules can help avoid errors and improve code stability.
    PHP Tutorial . Backend Development 523 2025-07-17 04:16:30
  • PHP Multi-Line Comment Examples
    PHP Multi-Line Comment Examples
    PHP multi-line comments use // format, suitable for commenting multiple lines of code or adding instructions. 1. It can be used to comment code segments during debugging, such as annotating database query code; 2. It is used to write functions or classes to describe functions and parameters; 3. It is used to add copyright information or file descriptions; precautions include: 4. Do not use multi-line comments in nesting, otherwise it will lead to parsing errors; 5. Avoid */ in strings resulting in misclosure; 6. Use shortcut keys with IDE to improve efficiency. Proper use of multi-line comments can help improve code readability and maintenance.
    PHP Tutorial . Backend Development 343 2025-07-17 04:16:11
  • PHP Installation for Beginners
    PHP Installation for Beginners
    Installing PHP is not complicated for novices. The key is to clarify the system environment and version requirements and follow the steps. First, you need to confirm the operating system (Windows, macOS or Linux) and choose a stable version such as PHP8.1 or 8.2; secondly, you can install it through manual installation, using integrated environments (such as XAMPP, WAMP) or package management tools (such as apt-get and brew). Then configure environment variables to ensure that the command line can recognize PHP instructions and run through the phpinfo() page test; finally pay attention to common problems, such as Apache port occupation, php.ini file path errors and extensions not enabled, etc., and check them one by one to complete the installation smoothly.
    PHP Tutorial . Backend Development 965 2025-07-17 04:15:50
  • php parse date without time
    php parse date without time
    In PHP, the time information is ignored when extracting the date part in PHP, the following methods can be adopted: 1. Use date() and strtotime() to parse the string date and format the output, which is suitable for standard formats; 2. Use the DateTime class to provide more flexible operations such as time zone, date addition and subtraction, etc.; 3. When processing user input, you can use DateTime::createFromFormat() or regular extraction of the date part, pay attention to verifying the input to avoid errors. Select the appropriate method according to the scene, use date() to strtotime() for simple conversion, and complex logic takes DateTime.
    PHP Tutorial . Backend Development 943 2025-07-17 04:15:31
  • Setting Up PHP on macOS
    Setting Up PHP on macOS
    It is recommended to use Homebrew to install PHP, run /bin/bash-c"$(curl-fsSLhttps://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)" to install Homebrew, and then execute brewinstallphp or a specified version such as brewinstallphp@8.1; after installation, edit the php.ini file in the corresponding path to adjust memory_limit, upload_max_filesize, post_max_size and display_
    PHP Tutorial . Backend Development 673 2025-07-17 04:15:10
  • Advanced PHP Multiline Comment Techniques
    Advanced PHP Multiline Comment Techniques
    UsemultilinecommentsinPHPforfunction/classdocumentation,codedebugging,andfileheaderswhileavoidingcommonpitfalls.First,documentfunctionsandclasseswith/*...*/toexplainpurpose,parameters,andreturnvalues,aidingreadabilityandenablingIDEintegration.Second,
    PHP Tutorial . Backend Development 438 2025-07-17 04:14:51
  • Get PHP Running on Your System
    Get PHP Running on Your System
    There are four steps to make PHP run on the system: installation, configuration, testing and troubleshooting. First, you need to select the appropriate version to install according to the operating system. Windows can use XAMPP or WAMP, Mac uses brewinstallphp, and Linux uses sudoaptinstallphp; secondly, configure the php.ini file, set the time zone, error report, etc., and confirm that the Apache/Nginx module is loaded; then test whether it is running normally by executing phpinfo(); finally solve common problems such as environment variables not set, insufficient permissions, port conflicts or multiple version confusion. Follow these steps to enable PHP successfully.
    PHP Tutorial . Backend Development 989 2025-07-17 04:14:30
  • Your Introduction to PHP Programming
    Your Introduction to PHP Programming
    PHP is a server-side scripting language suitable for web development, especially good at dynamic content generation and database interaction. 1. It can be used to process form submission, interact with the database, create sessions, and generate HTML pages dynamically; 2. Getting started with XAMPP or WAMP environment, and run the PHP file in the htdocs directory; 3. The syntax is concise, the variables start with $, use echo to output content, and the control structure is similar to other programming languages; 4. The database can be connected to mysqli or PDO to perform queries and operations. After mastering the basics, you can learn frameworks such as Laravel to improve efficiency.
    PHP Tutorial . Backend Development 242 2025-07-17 04:14:10

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