Insert that particular value changed record - php

Question

From the below code, if it displays 10 records and if the user changes 'Code' or 'Number' value of 2nd and 5th record, how to insert only that 2nd and 5th record in another separate table. But from my insert query i can insert all 10 records. But i need only two affected records to be inserted. Please help.
include('DB.php');
$sql="SELECT * FROM customer where customer_name='".$q."' ";
$result = mysql_query($sql);
$num_row = mysql_num_rows($result);
$row_count=1;
if($num_row>0)
{
echo "<table >
<tr>
<th>S.No</th>
<th>Name</th>
<th>Code</th>
<th>Number</th>
</tr>";
while($row = mysql_fetch_array($result)) {
$c_name=$row['c_name'];
$c_code=$row['c_code'];
$c_number=$row['c_number'];
echo "<tr>";
echo "<td> $row_count.</td>";
echo "<td><input type='text' name='c_name[]' id='c_name' value='$c_name' readonly /></td>";
echo "<td><input type='text' name='c_code[]' id='c_code' value='$c_code' /></td>";
echo "<td><input type='text' name='c_number[]' id='c_number' value='$c_number' /></td>";
echo "</tr>";
$row_count++;
}
echo "</table>";
}
INSERT:
$c_name=$_POST['c_name'];
$c_code=$_POST['c_code'];
$c_number=$_POST['c_number'];
if(isset($c_code))
{
for($i=0;$i<count($c_code);$i++)
{
{
$insert=mysql_query("INSERT INTO customer_table2(name,code,number)
VALUES ('$c_name[$i]','$c_code[$i]','$c_number[$i]')");
}
}

Answer 1

Do a SELECT query first, to see if the row is already in the original table. If not, add it to the new table.
$c_name=$_POST['c_name'];
$c_code=$_POST['c_code'];
$c_number=$_POST['c_number'];
if(isset($c_code))
{
for($i=0;$i<count($c_code);$i++)
{
// Prevent SQL injection
$name = mysql_real_escape_string($c_name[$i]);
$code = mysql_real_escape_string($c_code[$i]);
$number = mysql_real_escape_string($c_number[$i]);
$select = mysql_query("SELECT COUNT(*) AS c FROM customer WHERE name = '$name' AND code = '$code' AND number = '$number'");
$row = mysql_fetch_assoc($select);
if ($row['c'] == 0) {
$insert=mysql_query("INSERT INTO customer_table2(name,code,number)
VALUES ('$name','$code','$number')");
}
}
}