integrating a function - function

Question

this is the follow-up to my question about getting a div's content. the second function is the one im having a hard time with. im pretty sure i can call a function from another one, but im not sure about placing them into oneanother like i did here. its obviously a silly attempt to make the code work, since it gives me an error:
Blackline Frostbyte : in stock. : $139.99
Fatal error: Cannot redeclare get_string_between() (previously declared in /home/rambazar/public_html/cron.php:69) in /home/rambazar/public_html/cron.php on line 69
as i see this, the code is partially ok, because it gets a products stock info and the price tag, but the code stops and i cant figure out where get_string_between is redeclared, as it is only called. please help me sorting this out, thanks!
<?php
set_time_limit(1800);
include("admin/include/db.php");
error_reporting(E_ALL);
$res=mysql_query("select * from products");
while($row=mysql_fetch_array($res))
{
$availability=getavailability($row['newegg_productid']);
$price=getprice($row['newegg_productid']);
echo $row['productname']." : ".$availability." : ".$price."<br />";
}
function getavailability($itemId)
{
$url=trim("http://www.newegg.com/Product/Product.aspx?Item=".$itemId);
$ch = curl_init();
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_VERBOSE, true);
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_TIMEOUT, 20);
curl_setopt($ch, CURLOPT_AUTOREFERER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
$content = curl_exec ($ch);
curl_close ($ch);
$content=strtolower($content);
$buff=$content;
$isAvailable=false;
$pos1=strpos($content,'<p class="note">')+16;
if($pos1==16)return "";
$pos2=strpos($content,'</p>',$pos1);
$availability= trim(substr($content,$pos1,($pos2-$pos1)));
return strip_tags($availability);
}
function getprice($itemId)
{
function get_string_between($string, $start, $end)
{
$string = " ".$string;
$ini = strpos($string,$start);
if ($ini == 0)
return "";
$ini += strlen($start);
$len = strpos($string,$end,$ini) - $ini;
return substr($string,$ini,$len);
}
$data = file_get_contents("http://www.newegg.com/Product/Product.aspx?Item=".$itemId);
$pricediv = get_string_between($data, '<div class="current" id="singleFinalPrice"><span class="label">Now:', '</div');
$price = strip_tags($pricediv);
return $price;
}
?>

Answer 1

Take out the get_string_between() out of the getprice() function and you should be good to go:
function get_string_between($string, $start, $end)
{
$string = " ".$string;
$ini = strpos($string,$start);
if ($ini == 0)
return "";
$ini += strlen($start);
$len = strpos($string,$end,$ini) - $ini;
return substr($string,$ini,$len);
}
function getprice($itemId)
{
$data = file_get_contents("http://www.newegg.com/Product/Product.aspx?Item=".$itemId);
$pricediv = get_string_between($data, '<div class="current" id="singleFinalPrice"><span class="label">Now:', '</div');
$price = strip_tags($pricediv);
return $price;
}