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Discover how to efficiently list only the top-level files and folders from a ZIP archive using PHP's `ZipArchive`.
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How to List Only One Level of Files in a ZIP Archive with PHP's ZipArchive

Handling ZIP files is a common task when working with PHP, especially in web development. Suppose you want to get a quick overview of the structure of a ZIP archive, such as wp.zip, but you only need to see the first level of files and directories. In this guide, we'll discuss a common issue—listing only one level of files and folders from a ZIP archive—and provide a clear solution to achieve this.

The Problem

If you've ever attempted to list the contents of a ZIP file using PHP's ZipArchive, you may have encountered an issue where the code returns all files recursively, which can be overwhelming. For example, when you wish to see just the first level of files like:

[[See Video to Reveal this Text or Code Snippet]]

Instead, you receive a complete list that includes nested directories and files. To address this, we need a way to filter the output to display only the items at the top-most layer of the ZIP archive.

The Solution

To resolve this, we can modify our approach by using the ZipArchive class in PHP effectively. Here's a step-by-step guide to get the desired output using a custom function.

Step 1: Set Up Your Code

First, you need to include the necessary setup for using the ZipArchive. Here's a simple starting point:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Create a Custom Function

Next, you can create a function that will parse through the entries of the ZIP archive and filter them based on their hierarchy levels:

[[See Video to Reveal this Text or Code Snippet]]

Explanation of the Function

Parameters: The function takes two parameters: the ZipArchive object and the level of depth (defaulting to 1).

Loop Through Files: It loops through each file in the archive using the numFiles property.

Split the Names: For each entry, it trims the name and splits it by the / character, which separates directories and files.

Filter by Level: The function checks if the count of the exploded name matches level + 1 (the desired depth).

Return Results: It collects the relevant top-level entries into an array and returns it.

Step 3: Display the Output

Finally, you can call this function and print the results:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By following these steps, you can easily list only the top-level files and directories within a ZIP archive using PHP's ZipArchive. This approach helps simplify the results, making it easier to navigate through the contents of your ZIP files without overwhelming noise from deeper directory levels.

Summary

Use the ZipArchive class to open and interact with ZIP files.

Create a function to filter files based on their hierarchy.

Maintain clarity by focusing only on the first-level entries.

Feel free to implement this code snippet in your projects, and enjoy having a neatly organized listing of your ZIP archive contents!