insert multiple rows from array into table with unique ID

I have copied and modified a script off the internet. The script originally deleted selected records from a mysql table query. I have modified the script to insert the selected records into another table with the insert into statement.

I would like to know how I can insert all the selected records from the mysql array into the other table with the same id.

The logic is simlar to that of an 'orderdetails' table. I want all products ordere开发者_开发技巧d to have the same ordernumber so they share a common value.

How can I modify the below script to insert all values from the array with a unique number?

<?php
mysql_connect("localhost", "user", "pass")or die("cannot connect");    
mysql_select_db("db")or die("cannot select DB");
$sql="SELECT * FROM category";
$result=mysql_query($sql);
$count=mysql_num_rows($result);
?>
<table width="400" border="0" cellspacing="1" cellpadding="0">
<tr><td><form name="form1" method="post">
<table width="400" border="0" cellpadding="3" cellspacing="1" bgcolor="#CCCCCC">
<tr><td bgcolor="#FFFFFF">&nbsp;</td>
    <td colspan="4" bgcolor="#FFFFFF"><strong>Insert multiple rows in mysql</strong></td></tr>
<tr><td align="center" bgcolor="#FFFFFF">#</td>
    <td align="center" bgcolor="#FFFFFF"><strong>Category ID</strong></td>
    <td align="center" bgcolor="#FFFFFF"><strong>Category</strong></td></tr>
<?php
while($rows=mysql_fetch_array($result)){
?>
<tr><td align="center" bgcolor="#FFFFFF"><input type="checkbox" name=check[]  value="
<?php echo $rows['cat_id']; ?>"></td>
<td bgcolor="#FFFFFF"><?php echo $rows['cat_id']; ?></td>
<td bgcolor="#FFFFFF"><?php echo $rows['category']; ?></td></tr>

<?php
}
?>
<tr><td colspan="3" align="center" bgcolor="#FFFFFF"><input name="delete" type="submit" id="delete" value="Delete"></td></tr>
<?php
$check=$_POST['check'];
if($_REQUEST['delete']=='Delete'){
  {
    $sql="INSERT INTO category1 (cat_id,category) 
             SELECT cat_ID, category 
             FROM category 
             WHERE cat_id='$val'";

    foreach($check as $key=>$value)
    {
      $sql="INSERT INTO category1 (cat_id,category) 
              SELECT cat_ID, category 
              FROM category 
              WHERE cat_id='$value'";
      $final = mysql_query($sql);
      if($final) {
        echo "<meta http-equiv=\"refresh\" content=\"0;URL=php.php\">";
      }
    } 
  }
}
// Check if delete button active, start this   
// if successful redirect to php.php

mysql_close();
?>
</table></form></td></tr></table>

You code has several issues:

A- You have SQL-injection holes: Use mysql_real_escape_string()
B- You have possible XSS vulnerabilities: Use htmlspecialchars to escape all $vars that you echo.
C- Using select * when you're only going to use the fields catID, category is waste full. Always name the fields you select explicitly.

See:
How does the SQL injection from the "Bobby Tables" XKCD comic work?
What are the best practices for avoiding xss attacks in a PHP site
What is the reason not to use select *?

To answer your question
I would use code something like

$check = $_POST['check'];
if (is_array($check)) {
  //simple test to see if an array is multi-dimensional.
  if (count($array) != count($array, COUNT_RECURSIVE)) 
  {
     //die("multidimensional array's are not allowed");
     //insert code to reask the array, or work around the issue.
     //you really should not use `die` in production code.
  } else {
  //escape what's inside the array, not the array itself.
  $check = array_walk($check, 'mysql_real_escape_string');
  $check = "'".implode("','",$check)."'"; //1,2,3 => '1','2','3'
} else { //not an array
  $check = "'".mysql_real_escape_string($check)."'";
}
//Inserts all $check's in one go.
$sql = "INSERT INTO category1 (cat_id,category) 
          SELECT cat_ID, category 
          FROM category 
          WHERE cat_id IN ($check) ";  //$check is already quoted.