How to Get File Size of Files Over 2GB in PHP Without External Tools?

Getting File Size of Files Larger than 2 GB in PHP Without External Programs

Obtaining the file size of a file exceeding 2 GB can be challenging due to limitations in native PHP functions like filesize() and stat(). However, there are alternative solutions to achieve this without relying on external programs.

Solution: Big File Tools Project

To address this issue, the Big File Tools project was created as an open-source collection of PHP hacks for manipulating files larger than 2 GB. This solution employs various techniques:

1. Platform-Specific Shell Commands: The project attempts to use appropriate shell commands based on the platform, such as Windows shell modifiers or the *nix/Mac stat command. This approach ensures cross-platform compatibility.
2. Windows COM Interface: For Windows systems, the project leverages the COM interface to retrieve file size information. By accessing the File System Object, it can gather accurate file size data.
3. Fallback to File Size: In cases where the above methods fail, the project falls back to using PHP's filesize() function, which may not provide accurate results for files larger than 2 GB.

Code Example

The following code sample demonstrates how to use the filesize64() function from the Big File Tools project to obtain file size information:

<code class="php">function filesize64($file)
{
    // ... (code implementation as described above)
}

$fileSize = filesize64('path/to/largefile.ext');</code>

By utilizing the Big File Tools project, developers can now retrieve the file size of files larger than 2 GB in PHP, even on 32-bit platforms, without the need for external programs or slow file content reading mechanisms.

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