Php 8.1 File append not working

[sodevrom]

Hello
I am trying to append multiple mp3 files (same encoding), but the files do not get appended.
Only the first file is saved in the final output.
Example:

$file_mp3= \falahati\PHPMP3\MpegAudio::fromFile("audio1.mp3");
$file_mp3->append(\falahati\PHPMP3\MpegAudio::fromFile("audio2.mp3"));
$file_mp3->saveFile("final_file.mp3");

No errors, only the first mp3 is added in the final file, and the final saved file size is equal to file 1.

Can you please help?

[sodevrom]

Doing more tests, it seems the added function (to fix detection of end of file)

$this->memoryPointer = min($this->memoryLength, $index + $length);
//this is the problem ->
if ($this->memoryPointer >= $this->memoryLength) {
return false;
}

Is causing the problem with append. But if we remove this, in some cases it goes in an infinite loop.

[sodevrom]

More testing, I think I Found a fix.
Instead of
if ($this->memoryPointer >= $this->memoryLength) {
return false;
}

We should write
if($index+$length>$this->memoryLength)
return false;

It works for me.