what's the code meaning?
<pre><code>$file = fopen("test.txt","r");
while($line = fgets($file)) {
  $line = trim($line);
  list($model,$price) = preg_split('/\s+/',$line);
  if(empty($price)) {
    $price = 0;
  }
  $sql = "UPDATE products
          SET products_price=$price
          WHERE products_model='$model'";    
  // run the sql query.
}
fclose($file);
</code></pre>

<p>the txt file like this:</p>

<pre><code>model  price
LB2117  19.49
LB2381  25.99
</code></pre>

<p>1, what's the meaning of   <code>list($model,$price) = preg_split('/\s+/',$line);</code>
i know <code>preg_split</code> like <code>explode</code>, but i don't know what't the parameter meaning of the above line
2, how to skip the first record.</p>
