How to Determine the Size of Large Files on a 32-Bit Platform in PHP?

How to Determine the Size of Large Files on a 32-Bit Platform in PHP

Determining the size of files exceeding 2 GB can be a challenge, especially on 32-bit platforms where native PHP functions may not suffice. The following methods attempt to address this issue without the use of external programs:

Big File Tools

The open-source project Big File Tools offers a collection of hacks for managing files over 2 GB in PHP, even on 32-bit systems. It provides a solution for retrieving file sizes on both Windows and Linux/Mac platforms: https://github.com/jkuchar/BigFileTools

filesize64 Function

The filesize64 function presented below attempts various methods to obtain the file size of large files:

• Shell Command: If feasible, it utilizes platform-specific shell commands (e.g., Windows shell substitution or *nix stat command) to retrieve the file size.
• COM Interface (Windows): On Windows, it leverages the COM interface to access the file's size.
• Native filesize() Function: As a fallback, it reverts to the native filesize() function.

The implementation of the filesize64 function is as follows:

<code class="php">function filesize64($file)
{
    // ... (code as provided in the original answer) ...
}</code>

By employing this function or utilizing the Big File Tools library, developers can overcome the limitations of native PHP functions and accurately determine the size of files larger than 2 GB on 32-bit platforms.

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