我需要根据csv文件的函数依赖关系从csv文件创建两个表，例如，我有一个借书表

我想把这个表分成两个表，一个表中有bookid、书名、isbn、数量、出版商、authorid、authorname，
第二个表中的借入ID、studentid、studentname、借入日期、bookid。
希望你能帮助我。
/这是我的密码/

$filetype= basename($_FILES['file']['name']);
$filename=$_FILES["file"]["tmp_name"];  

if($_FILES["file"]["size"] > 0){
    $file = fopen($filename, "r");
    if(substr($filetype, -3) == 'csv'){

        $csvName = time() .'_'.$_FILES['file']['name'];
        $target = 'csv/' . $csvName;
    }
}
$primary[] = "Borrowid"; 
$handle = fopen($target,'r');

    if(($getData = fgetcsv($handle)) !== FALSE){
        $i=1;
        $PK_columns = Array();

        //number of columns
        $num = count($getData);
        $row=0;

        //start count rows
        $csv = Array();
        $rowcount = 1;
        $max_line_length = defined('MAX_LINE_LENGTH') ? MAX_LINE_LENGTH : 10000;
        $header = fgetcsv($handle, $max_line_length);
        $header_colcount = count($header);
        while (($row = fgetcsv($handle, $max_line_length)) !== FALSE) {
            $row_colcount = count($row);
            if ($row_colcount == $header_colcount) {
                $entry = array_combine($header, $row);
                $csv[] = $entry;

            }
            else {
                error_log("csvreader: Invalid number of columns at line " . ($rowcount + 2) . " (row " . ($rowcount + 1) . "). Expected=$header_colcount Got=$row_colcount");
                return null;
            }
            $rowcount++;
        }// end count rows

        if (($handle = fopen($target, "r")) !== FALSE) {
            while (($getData = fgetcsv($handle, 1000, ",")) !== FALSE) {
                for ($i = 0; $i < $num; $i++) { // Loop over the data using $i as index pointer\

                    if (in_array($getData[$i], $primary)){
                        $PK_columns[] = $i;     // Fetch no of PK
                    }
                }
            }
        }