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- How to Install PHP
- The method of installing PHP varies from operating system to operating system. The specific steps are as follows: 1. It is recommended to use XAMPP integrated environment installation on Windows, or manually configure PHP and set environment variables; 2. macOS recommends to execute brewinstallphp installation through Homebrew and manually start Apache; 3. Linux (such as Ubuntu) can be installed with apt with apt, and verify the installation by creating test files. After each system is installed, attention should be paid to check the configuration, extension and service status to ensure normal operation.
- PHP Tutorial . Backend Development 269 2025-07-17 02:36:50
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- Writing PHP DocBlocks
- The key to writing PHPDocBlocks is to improve the readability and maintenance of the code, and the content should be useful and not verbose. DocBlocks is a special annotation starting with /**, and uses @ tags to describe information. Common tags include: 1. @param explains the parameter type and purpose; 2. @return explains the return value; 3. @var indicates the variable type; 4. @throws describes the possible throw exceptions. It is recommended to add DocBlock to classes and interfaces, public methods, complex logical methods, and variable properties, with the focus on clearly expressing the design intention. Practical techniques include: the order of parameters is consistent with the annotation, the type is specific, the sentence is concise, and the avoidance of repeated descriptions. The ultimate goal is to make others ask fewer questions.
- PHP Tutorial . Backend Development 129 2025-07-17 02:04:21
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- Commenting Out Multiple Lines of PHP Code
- To comment out multiple lines of PHP code, it is recommended to use // wrap code blocks. This method is directly and efficient and suitable for multi-line comments; secondly, you can use the editor shortcut key to add single-line comments in batches; you can also use if(false) techniques to prevent the code from being executed. Avoid manually adding // or # line by line, which is less efficient. Different methods have different application scenarios, //The most common, shortcut keys are suitable for temporary debugging, and if(false) is suitable for clear logical control.
- PHP Tutorial . Backend Development 322 2025-07-17 01:37:11
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- php date interval format
- The basic format of DateInterval starts with P and contains the year, month, day, and time. It must be written in order and the corresponding letters must be used. The standard format is P year Y[D]T hour H[second S], for example, P1D represents one day, and PT1H30M represents one hour and thirty minutes. Common errors include the lack of P, the order is reversed, the time part is missing T, and spaces or symbols before the number. When used in actual use, DateInterval usually performs date addition and subtraction operations with DateTime objects, and can also be used to traverse date ranges. In addition, it supports the rapid creation of common intervals such as daily, weekly, and monthly, but does not support logic such as "one day of the month" and requires additional processing. Mastering format rules is to use DateInterv correctly
- PHP Tutorial . Backend Development 241 2025-07-17 01:30:21
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- how to create a php array using compact
- compact() is a function in PHP that quickly creates associative arrays based on variable names. Its function is to generate an array using variable names as keys and variable values as values. When using it, make sure that the variable is defined and undefined variables will not appear in the result; variable names can be passed in multiple parameters or array forms (PHP7.3); variable names must be consistent with array keys to avoid confusion. It is common in form data processing and simplified code structure, but attention should be paid to readability and maintenance. If the array lacks certain keys, it is usually because the variable is undefined or misspelled. The rational use of compact() can improve the simplicity of the code, and it is necessary to ensure that the variables exist and are named accurately.
- PHP Tutorial . Backend Development 747 2025-07-17 01:22:00
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- How to get number of rows from prepared statement
- Getting the number of rows affected by precompiled statements can be implemented in different ways: 1. When using PDO in PHP, call rowCount() or fetchAll and count(); 2. When using mysqli, call store_result() and access num_rows; 3. Node.js or Python count the length after obtaining the result array; 4. Note that some databases do not support direct acquisition, and need to be manually calculated or paging, LIMIT1 and other methods to optimize performance. The core idea is to execute the statement first and then extract the row count information from the result set.
- PHP Tutorial . Backend Development 169 2025-07-17 00:45:51
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- PHP Comments: Best Practices for Code Readability
- The core of writing PHP comments is to improve the readability and maintenance of the code. Comments should explain "why" rather than "what was done", for example, stating that splicing names use spaces instead of template strings to be compatible with older versions of PHP. Really worth noting places include bypassing framework restrictions, temporary fixes to bugs, or sources of specific business rules. Each function and class should have a complete specification of comment blocks, including function description, parameter type, return value, whether an exception was thrown, and optional author or creation time. The comments in the line should be concise and effective, suitable for explaining complex judgments, marking special treatments, and reminding of side effects. It is also recommended to use TODO and FIXME to mark to-dos or issues to be fixed, and to clean up useless comments regularly. The more comments, the better, the key is to express them accurately
- PHP Tutorial . Backend Development 425 2025-07-17 00:42:31
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- How to Declare PHP Variables
- When declaring variables in PHP, you need to pay attention to variable naming rules, automatic type inference, variable scope and security issues. Variables start with $, are case sensitive, and do not need to declare types, and can be assigned directly; but to avoid uninitialized use, you can check it by isset() or empty(); mutable variables (such as $$var) are flexible but not recommended, and super-global variables (such as $_GET, $_POST) need to be safe; accessing global variables within a function requires external variables to be introduced with global, $GLOBALS or use.
- PHP Tutorial . Backend Development 748 2025-07-17 00:30:21
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- What Can You Build with PHP?
- PHPisstillwidelyusedandusefulforbuildingvariousweb-basedprojects.1.Itexcelsatcreatingdynamicwebsitesandwebapplications,supportinguserinteractionanddatabaseintegrationthroughframeworkslikeLaravelandCMSplatformslikeWordPress.2.PHPisasolidchoicefore-com
- PHP Tutorial . Backend Development 354 2025-07-16 03:48:31
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- How Do You Handle File Operations (Reading/Writing) in PHP?
- TohandlefileoperationsinPHP,useappropriatefunctionsandmodes.1.Toreadafile,usefile_get_contents()forsmallfilesorfgets()inaloopforline-by-lineprocessing.2.Towritetoafile,usefile_put_contents()forsimplewritesorappendingwiththeFILE_APPENDflag,orfwrite()w
- PHP Tutorial . Backend Development 738 2025-07-16 03:48:11
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- Exploring the PHP File: Structure and Purpose
- The core function of PHP files is to handle dynamic web content, combining server-side logic and front-end display. A typical structure includes four steps: introducing configuration files, starting a session, loading an autoloader, and routing and distribution. PHP allows to embed dynamic content in HTML, which is suitable for building template pages, but it is recommended to use the template engine to separate logic from views. In the file introduction method, require is used to ensure that the script terminates in errors, and include is used for optional modules; it is recommended to use the _once version uniformly to prevent duplicate loading. The code organization recommends a separate file for each class, and classifies functions into tool classes or services, and uses namespaces to improve readability and automatic loading efficiency.
- PHP Tutorial . Backend Development 483 2025-07-16 03:47:21
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- Why Choose PHP?
- PHP has been able to exist in the field of web development for a long time because of its simplicity, flexibility and wide applicability. 1. The entry threshold is low, the syntax is simple, and you can quickly get started and run the code; 2. The ecology is mature, with frameworks such as Laravel, Symfony, and CMSs such as WordPress, which can efficiently build websites; 3. Suitable for small and medium-sized projects, easy to deploy and maintain, low resource occupancy, and support frequent iterations; 4. Rich Chinese information, complete community support, and easy to solve problems. These features make PHP a pragmatic backend development choice.
- PHP Tutorial . Backend Development 362 2025-07-16 03:46:21
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- What is PHP and What is it Used For?
- PHPisaserver-sidescriptinglanguageusedforwebdevelopment,especiallyfordynamicwebsitesandCMSplatformslikeWordPress.Itrunsontheserver,processesdata,interactswithdatabases,andsendsHTMLtobrowsers.Commonusesincludeuserauthentication,e-commerceplatforms,for
- PHP Tutorial . Backend Development 215 2025-07-16 03:45:11
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- php get tomorrow's date
- Getting tomorrow's date in PHP can be achieved through the strtotime() function or the DateTime class. 1. Use strtotime(): output tomorrow's date through echodate("Y-m-d", strtotime("tomorrow")), which is suitable for basic needs. 2. Use the DateTime class: Implemented by $date=newDateTime('tomorrow');echo$date->format('Y-m-d'), supporting object-oriented operations, time zone settings and chain calls, suitable for complex scenarios. Notes include setting the correct time zone and location
- PHP Tutorial . Backend Development 526 2025-07-16 03:42:21
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