<?php
$chataudiopath = "uploadss/";
$tmp_dir = "tmp/";

$target_dir = $chataudiopath;
if (!file_exists($target_dir)) {
    mkdir($target_dir, 0777, true);
}
    $mname = date("Y") . date("m") . date("d");
    $tarihPath = $mname . "/";
    $new_dir = $chataudiopath . $tarihPath;

    if (!file_exists($new_dir)) {
        mkdir($new_dir, 0777, true);
        copy($chataudiopath . "index.php", $new_dir . "index.php");
    }

$target_file = $new_dir . basename($_FILES["file"]["name"]);
$uploadOk = 1;
$fileType = strtolower(pathinfo($target_file, PATHINFO_EXTENSION));

if (isset($_FILES["file"])) {
    $check = filesize($_FILES["file"]["tmp_name"]);
    if ($check !== false) {
        echo "File is an audio file - " . $check . " bytes.";
        $uploadOk = 1;
    } else {
        echo "File is not an audio file.";
        $uploadOk = 0;
    }
}

if (file_exists($target_file)) {
    echo "Sorry, file already exists.";
    $uploadOk = 0;
}

if ($fileType != "3gp" && $fileType != "mp3" && $fileType != "wav" && $fileType != "m4a" && $fileType != "aac") {
    echo "Sorry, only 3GP, MP3, WAV, M4A, and AAC files are allowed.";
    $uploadOk = 0;
}

if ($uploadOk == 0) {
    echo "Sorry, your file was not uploaded.";
} else {
    if (move_uploaded_file($_FILES["file"]["tmp_name"], $target_file)) {
        echo "The file " . htmlspecialchars(basename($_FILES["file"]["name"])) . " has been uploaded.";
    } else {
        echo "Sorry, there was an error uploading your file.";
    }
}
?>

With this code, I upload 3gp from java and save it to the server.
but it corrupts the file.
You need to wait 30 minutes for it to upload a new file without damaging it.

Why does it give this error? Should I make a setting on the server?

One file is uploaded intact, but all subsequent files are not uploaded properly until about 30 minutes later. I cannot open the files.