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- Check if the URL exists in the URL array retrieved from the database
- This article aims to solve the URL matching problem. When the URL list retrieved from the database is compared with the current URL, the match fails due to possible spaces and line breaks in the string. Ensure the expected functionality by using the array_map and trim functions to clean up the URL list to ensure accurate matches.
- PHP Tutorial . Backend Development 818 2025-09-16 15:57:00
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- Efficiently manage Laravel database queues: Cancel and clean up policies
- This article explores in-depth database-based queue task management in the Laravel framework, especially how to effectively cancel and clean up pending and failed tasks. We will introduce in detail the application of the Laravel Artisan command in batch management tasks, and explain how to accurately cancel individual pending tasks through direct database operations in specific scenarios, while emphasizing operational considerations and best practices to ensure the stability and data consistency of the queue system.
- PHP Tutorial . Backend Development 531 2025-09-16 15:48:00
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- In-depth understanding of PHP exec() and FFmpeg: Ensure that the commands are executed correctly on the production server
- This article aims to solve common problems encountered by the PHP exec() function when calling FFmpeg in production environment. We will explore potential factors such as FFmpeg path, file permissions, and PHP execution environment, and focus on analyzing the core reasons for command failure - syntax construction and shell parsing of exec() command strings. By providing detailed troubleshooting steps, secure code examples and best practices, we help developers ensure that the FFmpeg commands run stably and efficiently on the web server.
- PHP Tutorial . Backend Development 270 2025-09-16 15:45:01
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- Cache control policy to ensure that the browser loads the latest image resources
- This tutorial explores how to solve the problem of browsers stubbornly cache images in CSS after the cache is invalidated through the version number of CSS/JS files. By setting the HTTP cache control meta tag in the HTML header, the browser can be effectively instructed to force reverify and load the latest version of the image resources, ensuring that the user always sees the updated visual content and avoid version inconsistencies caused by cache.
- PHP Tutorial . Backend Development 745 2025-09-16 15:33:00
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- Add 'Open on new tab' shopping cart button to WooCommerce external items
- This tutorial is designed to guide users on how to add a "Open on New Tab" shopping cart button to external items in the WooCommerce store. By modifying the functions.php file, we can customize the Add to Cart buttons of the store page and product details pages, so that its links open in a new tab page, improving the user experience, especially when using affiliate links.
- PHP Tutorial . Backend Development 301 2025-09-16 15:27:01
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- Correct practices of PHP custom iterators handling associative arrays
- This article discusses the problems and solutions that a custom Iterator interface in PHP may encounter when dealing with associative arrays. Iterations of associative arrays may not work as expected when the custom iterator does not manage array keys correctly. The article provides two main strategies to ensure that custom iterators can accurately traverse key-value pairs of associative arrays: one is to utilize PHP internal array pointer function, and the other is to explicitly maintain a key list to achieve flexible and correct iteration logic.
- PHP Tutorial . Backend Development 988 2025-09-16 15:15:00
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- Add product category links to WooCommerce individual product pages
- This tutorial is intended to guide WooCommerce users how to add a hyperlink to a product category name on a single product page to link it to the corresponding category page. We will implement this by modifying the theme's functions.php file, using the wc_get_product_category_list() function, and provide complete code examples and notes to help you easily implement hyperlinks to product categories.
- PHP Tutorial . Backend Development 799 2025-09-16 15:12:01
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- Upload files and pass extra data using AJAX: Correct usage of FormData
- This article aims to help developers understand how to use AJAX to upload files and pass additional parameters to the server side at the same time. This highlights the correct use of FormData objects in AJAX file uploads and how to avoid common misconfigurations. At the same time, this article also emphasizes the importance of server-side code security and provides suggestions to prevent SQL injection attacks.
- PHP Tutorial . Backend Development 853 2025-09-16 15:09:01
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- Dynamic table row display/hide toggle tutorial: Optimize user experience with single buttons
- This tutorial is designed to solve how to efficiently implement the default hiding of table rows (exceeding a specified number) with the "Show more" and "Show less" toggle functions through a single button in dynamically generated tables. We will abandon inefficient manual DOM operations and instead use jQuery’s powerful selector and DOM operation method to provide a cleaner, maintainable and high-performance solution that significantly improves the user experience.
- PHP Tutorial . Backend Development 312 2025-09-16 15:06:01
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- Upload files and pass additional data using AJAX and FormData
- This document is intended to guide developers how to properly upload files using AJAX and FormData objects and pass additional parameters (such as IDs) to the server during the upload process. We will focus on how FormData objects are used in AJAX requests and provide a viable example while emphasizing the importance of server-side security to avoid SQL injection attacks.
- PHP Tutorial . Backend Development 389 2025-09-16 15:03:01
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- PHP Iterator interface: How to correctly handle key-value iteration of associative arrays
- This article discusses how to correctly handle key and value iteration of associative arrays when implementing the Iterator interface in PHP. By analyzing common misunderstandings, two core solutions are provided: one is to use PHP's built-in array pointer function to delegate key-value management to the underlying array; the other is to explicitly maintain the key list and access keys and values ??indirectly through pointers. It aims to help developers build custom iterators that can flexibly traverse various arrays.
- PHP Tutorial . Backend Development 868 2025-09-16 14:51:00
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- How to keep the drop-down list selected after form submission in Laravel
- This article aims to resolve the issue of resetting the drop-down list after form submission in Laravel applications. By leveraging the request object and old input value capabilities provided by Laravel, we can easily keep the options selected by the user in the drop-down list after the page is refreshed, thereby enhancing the user experience. This article will provide detailed descriptions on how to correctly handle the selected status of the drop-down list in the view, and provide corresponding code examples and considerations.
- PHP Tutorial . Backend Development 454 2025-09-16 14:48:01
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- MySQL conditional aggregation: Use CASE statement to implement condition summing and counting of fields
- This article discusses in depth how to use CASE statements to perform conditional aggregation in MySQL to achieve conditional summation and counting of specific fields. Through a practical subscription system case, it demonstrates how to dynamically calculate the total duration and number of events based on record status (such as "end" and "cancel"), thereby overcoming the limitations of traditional SUM functions that cannot meet the needs of complex conditional aggregation. The tutorial analyzes the application of CASE statements in SUM functions in detail and emphasizes the importance of COALESCE when dealing with the possible NULL values ??of LEFT JOIN.
- PHP Tutorial . Backend Development 659 2025-09-16 14:39:01
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- PHP handles arithmetic operations of super large floating point numbers
- This article aims to solve the problem of handling extremely large numerical operations in PHP that exceed the range of floating point representation. By separating mantissa and exponent, the operation rules of scientific notation are simulated to realize the multiplication of large numerical values. At the same time, the importance of using professional math libraries or classes to perform more complex operations is emphasized to avoid accuracy loss and overflow problems.
- PHP Tutorial . Backend Development 354 2025-09-16 14:36:01
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