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25 Aug 2025
This tutorial details how to use PHP for file operations, including reading data from files, processing data (such as numerical calculations and conditional judgments), and writing processed results to a new file. Through a specific grade processing example, you will learn how to use core functions such as file(), fopen(), fwrite() and fclose(), and master key techniques such as data type conversion, loop traversal and file flow management when processing file content.

30 Oct 2024
Skipping Headers When Processing a CSV File with PythonProblem:In Python, a CSV file is being processed, but the first row (header row) is being...

24 Aug 2025
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.

12 Aug 2025
When exporting CSV files using tools such as Laravel-Excel, due to the inconsistent number of columns in different rows, unnecessary commas often appear in the head and tail rows. This article provides a concise and efficient PHP solution. By reading the file content, using the rtrim function to remove the extra commas and line breaks at the end of each line, and then rewrite the processed content to the file, thereby realizing the automated post-processing of CSV files and ensuring the clean and standardized output format.

16 Aug 2025
This article details how to efficiently handle uploading multiple different file input fields in the same HTML form in PHP. By adopting array naming (such as name="files[image]" and name="files[document]"), uploaded data in the $_FILES hyperglobal variable can be elegantly organized and accessed. The article provides complete HTML forms and PHP processing code examples, covering key steps such as file verification, error handling, type judgment and secure storage, aiming to help developers build robust multi-file uploading functions.

26 Aug 2025
When using the PHP trim() function to process CSV files, if you find that the line end commas cannot be removed, the core reason is often the difference in line breaks between different operating systems. exploit(PHP_EOL, $csv) may fail to completely remove invisible line breaks at the end of the line, causing trim() to fail to recognize and remove the target character. The solution is to extend the character mask of trim() so that it processes commas, carriage return (\r) and line breaks (\n) at the same time to ensure thorough data cleaning.


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