The zip_entry_compressedsize() function is a built-in function in PHP that is used to get the compressed size of a file in a zip archive. The compressed size is the size of the file after it has been compressed using the zip compression algorithm.


The syntax of the zip_entry_compressedsize() function is as follows:

int zip_entry_compressedsize(resource $zip_entry)

Where $zip_entry is the zip_entry handle for the file in the zip archive.

Usage Examples

Let's take a look at a practical example of using zip_entry_compressedsize() in PHP.

Example: Getting the Compressed Size of a File in a Zip Archive

Suppose you have opened a zip archive using the PHP zip functions and want to get the compressed size of a file in the archive. You can use the zip_entry_compressedsize() function to do this, like this:

$zip = zip_open("");
$zip_entry = zip_read($zip);

// get the compressed size of the file
$compressed_size = zip_entry_compressedsize($zip_entry);

echo "The compressed size of the file is: " . $compressed_size . " bytes.";

This code opens a zip archive file "" using zip_open(). We then read a file in the archive using zip_read() and get its compressed size using zip_entry_compressedsize(). Finally, the compressed size is outputted to the user.


In this article, we've discussed the PHP zip_entry_compressedsize() function and how it can be used to get the compressed size of a file in a zip archive. We've explained what the function does, its syntax, and provided an example of how it can be used in a practical scenario. By using zip_entry_compressedsize() in your PHP applications, you can easily get the compressed size of a file in a zip archive and use that information as needed.

Practice Your Knowledge

What is the functionality of the zip_entry_compressedsize() function in PHP?

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