Inserting multiple rows into MySQL at once

If I understood your Question right what you wanna do is name the fields with a [] So

<select name="Year">

Becomes

<select name="Year[]">

Then you'll be able to loop through the submitted values, example:

foreach($_POST['Year'] as $k=>$v){
 echo $v." - This is the value";
 echo $k." - This is the key";
}

EDIT:

(string)$insert;
if(is_array($_POST['Year'])){
    foreach($_POST['Year'] as $k=>$v){  
         $insert .= "(".$_POST['Name'][$k].", ".$_POST['Short'][$k].", ".$_POST['Med'][$k].", ".$_POST['Long'][$k].", ".$_POST['VLong'][$k].", ".$_POST['Extreme'][$k].", ".$_POST['LJump'][$k].", ".$_POST['HJump'][$k].", ".$_POST['Shotputt'][$k].", ".$_POST['Discuss'][$k].", ".$_POST['Javelin'][$k].", ".$_POST['Date'][$k].", ".$_POST['Year'][$k]."),"; 
    }
     $insert = substr_replace($insert ,0,-1);
}else{
    $insert .= "($_POST['Name'], $_POST['Short'], $_POST['Med'], $_POST['Long'], $_POST['VLong'], $_POST['Extreme'], $_POST['LJump'], $_POST['HJump'], $_POST['Shotputt'], $_POST['Discuss'], $_POST['Javelin'], $_POST['Date'], $_POST['Year'])"; 
}
$sql="INSERT INTO results_main 
(`Name`, `Short`, `Med`, `Long`, `VLong`, `Extreme`, `LJump`, `HJump`, `Shotputt`, `Discuss`, `Javelin`, `Date`, `Year`)
VALUES 
".$insert;

This should do the trick to get everything into only one query instead of doing multiple queries for each row

Add brackets [] to ALL your names in your html-form (where it makes sense). The bracket [] tells that elements are treated as dynamic arrays.

In your html-form, do something like this:

<form name="input_primary" action="process.php" method="post">

    <font color="#FFFFFF"><strong>Date:</strong></font><input name="Date" type="date" />
   <font color="#FFFFFF"><strong>Year:</strong></font><select name="Year">
        <option value="7">Year 7</option>
        <option value="8">Year 8</option>
        <option value="9">Year 9</option>
        <option value="10">Year 10</option>
        <option value="11">Year 11</option>
        <option value="12">Year 12</option>
        <option value="13">Year 13</option>
       </select>
       <input type="submit" value="Save results!" name="submit" />


<table width="200" border="1px solid black" id="maintab">
  <tr>
    <th scope="col">Name</th>
    <th scope="col">100m</th>
    <th scope="col">200m</th>
    <th scope="col">400m</th>
    <th scope="col">800m</th>
    <th scope="col">1500m</th>
    <th scope="col">Long Jump</th>
    <th scope="col">High Jump</th>
    <th scope="col">Shotputt</th>
    <th scope="col">Discus</th>
    <th scope="col">Javelin</th>
  </tr>
<?php
//Repeat element inside loop 10 times
for($i=0;$i<10;$i++) {
?>
  <tr>
    <td>
        <input name="Name[]" type="text" />
    </td>
    <td> 
        <input name="Short[]" type="text" size="10px" />
    </td>
    <td>
         <input name="Med[]" type="text" size="10px" />
    </td>
    <td> 
        <input name="Long[]" type="text" size="10px" />
    </td>
    <td>
         <input name="VLong[]" type="text" size="10px" />
    </td>
    <td>
         <input name="Extreme[]" type="text" size="10px" />
    </td>
    <td>
         <input name="LJump[]" type="text" size="10px" />
    </td>
    <td>
         <input name="HJump[]" type="text" size="10px" />
    </td>
    <td>
         <input name="Shotputt[]" type="text" size="10px" />
    </td>
    <td>
         <input name="Discuss[]" type="text" size="10px" />
    </td>
    <td>
         <input name="Javelin[]" type="text" size="10px" />
    </td>
  </tr>
<?php
}
?>
</table>
</form>

And in your PHP code do something like this:

//Create initial query for sql-insert.
$sql="INSERT INTO results_main (`Name`, `Short`, `Med`, `Long`, `Vlong`, `Extreme`, `LJump`, `HJump`, `Shotputt`, `Discuss`, `Javelin`, `Date`, `Year`) VALUES ";


$date = $Date; //Do like this if date-element is only occur once (at top) (then no need for brackets)
$year = $Year; //Do like this if year-element is only occur once (at top) (then no need for brackets)

$cnt = count($Name);    
for ($i=0;$i<$cnt;$i++) {
    //Use mysql_escape_string to escape strings (when needed) BEFORE adding to the $sql.
    $n = $Name[$i];
    $s = $Short[$i];
    $me = $Med[$i];
    $lng = $Long[$i];
    $slng = $VLong[$i];
    $ext = $Extreme[$i];
    $ljump = $LJump[$i];
    $hjump = $HJump[$i];
    $shot = $Shotputt[$i];
    $disc = $Discuss[$i];
    $jav = $Javelin[$i];

    //Insert each row separated with a comma
    $sql .= "('$n', '$s', '$me', '$lng', '$slng', '$ext', '$ljump', '$hjump', '$shot', '$disc', '$jav', '$date', '$year'),";
}

$useQuery = substr($sql, 0, -1); //Delete last comma
$result = mysql_query($useQuery); //Do the actual insert

then of course, read up on PDO instead of using mysql_query etc. Do this soon because mysql_* functions like this are deprecated and will be removed in the future. PDO is a better alternative because it's oop, it's safer and more flexible. Start from here... http://www.php.net/manual/en/intro.pdo.php

Storing your data across multiple arrays is unsafe because its so easy to get out of order and cause errors. Instead store data into an associative array like this:

$people = array();
$people[] = array('Name' => $name, 'Short' => $short ....);

The above code creates and array of arrays and the inner arrays are associative arrays so you can use the following syntax to get the name of the first person:

$people[0]['Name'];

Everything stays together and if certain values arn't set for certain people it will not seep into the other peoples records.

I see you were using POST variables. The above associative array can be easily passed around with ajax (if thats what your using, just an option) by using json_encode and json_decode. This helps preserve data structures when your passing it through multiple languages.

Lastly to insert a large number of records I would suggest a PDO statement as one ofthe easiest and cleanest way to do this. Check out a great tutorial here http://net.tutsplus.com/tutorials/php/why-you-should-be-using-phps-pdo-for-database-access/

Hope this helps, good luck!