在PHP中复制大文件(超过2 GB)

$source = 'source_file.txt';
$destination = 'destination_file.txt';

$chunk_size = 1024 * 1024; // 1 MB

$source_handle = fopen($source, 'r');
$destination_handle = fopen($destination, 'w');

while (!feof($source_handle)) {
    $buffer = fread($source_handle, $chunk_size);
    fwrite($destination_handle, $buffer);
}

fclose($source_handle);
fclose($destination_handle);

$source = 'source_file.txt';
$destination = 'destination_file.txt';

ini_set('memory_limit', '4G'); // 设置内存限制为4 GB

if (copy($source, $destination)) {
    echo 'File copied successfully.';
} else {
    echo 'Failed to copy file.';
}