Copy large files (over 2 GB) in PHP

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This should do it.

function chunked_copy($from, $to) {
    # 1 meg at a time, you can adjust this.
    $buffer_size = 1048576; 
    $ret = 0;
    $fin = fopen($from, "rb");
    $fout = fopen($to, "w");
    while(!feof($fin)) {
        $ret += fwrite($fout, fread($fin, $buffer_size));
    }
    fclose($fin);
    fclose($fout);
    return $ret; # return number of bytes written
}

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