Found a total of 10000 related content
No file operation in PHP implements attachment sending and data storage
Article Introduction：This tutorial explains in detail how to avoid creating temporary files in PHP and directly process Base64-encoded PDF data through memory operations. We will explore how to extract Base64 strings from XML, decode them and send mail via SendGrid as attachments, while storing the original Base64 data to the database, improving security, performance and simplifying code.
2025-08-24
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712
What is a file system library in C 17?
Article Introduction：The C 17 file system library provides a unified, type-safe interface, making file and directory operations more intuitive and efficient. 1) The std::filesystem::path class simplifies path operation; 2) The std::filesystem::directory_iterator facilitates traversing directories; 3) Pay attention to exception handling and performance optimization to ensure the robustness and efficiency of the program.
2025-04-28
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1053
PHP gets a list of directory files and uses it in JavaScript
Article Introduction：This article will introduce how to use PHP to obtain the file names of all files in a specified directory and pass these file names into JavaScript code as an array. Read the directory through PHP's file operation function, then convert the PHP array into a JSON string using the json_encode function, and finally parse the JSON string in JavaScript, thereby realizing the passing and use of file names.
2025-08-21
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879
PHP file read and write operations: read, process and write grade data
Article Introduction：This document details how to use PHP for file reading and writing operations, and demonstrates in a practical case how to read grades from grades.txt file, add 1 (maximum value is 5), then write processed grades to the results.txt file, and finally output these processed grades in the console. Through this article, you will master the basic methods of PHP file operation and learn how to process data in files.
2025-08-26
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865
How to Extract Specific CSS Classes with PHP?
Article Introduction：Parsing CSS with PHP for Selective Class ExtractionIn this article, we aim to tackle the challenge of parsing a CSS file and extracting specific...
2024-11-15
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975
A Tour of PHP.INI
Article Introduction：Detailed explanation of PHP.ini file: The key to controlling PHP operation
The PHP.ini file is the core configuration file of the PHP server. It controls various parameter settings during PHP runtime, such as uploading directories, error logs, maximum script execution time, and file upload size limit. After modifying this file, you need to restart the server before the changes can take effect.
php.ini file location:
The location of the php.ini file varies depending on the server and how PHP is installed. You can use the phpinfo() function to find its location.
Key settings:
This article will focus on some important php.ini settings:
engine = On: Enable or disable the PHP engine. Setting it to Off will completely
2025-03-02
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923
What is the role of spl_autoload_register() in PHP's class autoloading mechanism?
Article Introduction：spl_autoload_register() is a core function used in PHP to implement automatic class loading. It allows developers to define one or more callback functions. When a program tries to use undefined classes, PHP will automatically call these functions to load the corresponding class file. Its main function is to avoid manually introducing class files and improve code organization and maintainability. Use method is to define a function that receives the class name as a parameter, and register the function through spl_autoload_register(), such as functionmyAutoloader($class){require_once'classes/'.$class.'.php';}spl_
2025-06-09
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413
PHP gets a list of directory files and uses it in JavaScript
Article Introduction：This article will introduce how to use PHP to read all file names in a specified directory and pass these file names to JavaScript code for use. Through PHP's file operation functions and JSON encoding, we can easily obtain file lists on the server and use JavaScript to further process them on the client, such as dynamically displaying file lists or performing other related operations.
2025-08-21
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812
Tutorial for PHP to get file names in folders and pass them to JavaScript
Article Introduction：This article will describe how to use PHP to read all file names in a specified folder and encode these file names in JSON format and pass them to JavaScript. Through PHP's file operation functions and JSON encoding, it is easy to pass server-side data to the client, making it easier to use these file names for further processing in JavaScript.
2025-08-21
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193
Hassle-Free Filesystem Operations during Testing? Yes Please!
Article Introduction：Virtual File System (VFS) simulates file system operations in unit tests, avoiding the hassle of cleaning temporary files. This article describes how to use the vfsStream library to simplify the testing of file system operations in PHP unit tests.
First, we have a simple FileCreator class for creating files:
2025-02-14
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509
Magic Methods and Predefined Constants in PHP
Article Introduction：Core points
PHP provides predefined constants and magic methods to enhance code functionality. Predefined constants provide read-only information about code and PHP, while magic methods are names reserved in the class to enable special PHP features.
Predefined constants (all capital letters enclosed with double underscores) provide information about the code. Examples include __LINE__ (returns the line number in the source file), __FILE__ (represents the file name, including its full path), __DIR__ (represents the file path only), __CLASS__ (returns the name of the current class), __FUNCTION__ (returns the name of the current function), __METHOD__ (represents the name of the current method), and
2025-02-28
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1231
Understanding Autoloading in PHP: How to Implement and Use It Efficiently
Article Introduction：Autoloading in PHP: Concept and Implementation
Autoloading is a mechanism in PHP that automatically loads classes when they are needed, without requiring an explicit include or require statement for each class file. It helps streamline code org
2025-01-01
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710
PHP file processing practice: safe and efficient reading, modifying and writing data
Article Introduction：This tutorial explains the core practices of file read and write operations in PHP in detail. Through a specific grade processing case, it demonstrates how to use the file() function to read file contents into an array, perform data type conversion and business logic processing, and then use fopen() and fwrite() to write the processed data into a new file. It emphasizes the importance of file handle management and error handling, aiming to help developers build robust file operation scripts.
2025-08-24
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259
How do I configure classmap autoloading in my composer.json file?
Article Introduction：To configure the automatic loading of Composer's classmap, first use the "classmap" key under "autoload" in composer.json to specify the directory or file. For example: {"autoload":{"classmap":["lib/","database/models/"]}}, Composer will scan the .php file in these paths and generate class maps. You can also specify a single file such as legacy_class.php. renew
2025-07-14
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766
