Php search engine with xml database

[IamMeCone]

Ok, i have not clue what i did wrong.

I am working on a search engine that gets it's data from an xml file

the xml format is <word>page1,page2.html>

i don't worry about how many times the word occurs in the page

however i do want to display the pages with more than one queryed words on it

it seems to work most of the time when i give it one or two words but anything over that repeats one result the the next result three times

$search is an array of the pages that match up with the query

$terms is an array of each term separatly

$num is how many times each page occurs that lines up side to side with $search

like this

$search[0]=the page

$num[0]= how many words the page has that maches up to the terms

 

here is the php

 

<?php
function array_check ($array, $string)
{
$foo;
for ($i = 0; $i <= count($array); $i++)
{
if ($array[$i] == $string)
{
$foo=1;
}
else
{
$foo=0;
}
return $foo;
}
}
function array_pos ($array, $string)
{
$foo;
for ($i = 0; $i <= count($array); $i++)
{
if ($array[$i] == $string)
{
return $i;
}
}
}
$xml = new SimpleXMLElement(file_get_contents('db.xml'));
$search= array();
$num = array();
$terms= explode(" ",(string)$_GET['q']);
for ($s = 0; $s <= count($terms); $s++)
{
if($xml->$terms[$s])
{
	$res=explode(",",$xml->$terms[$s]);
	$i=0;
	for ($t = 0; $t <= count($res)-1; $t++)
	{
		if(array_check($search,$res[$t])==1)
		{
 		$num[array_pos($search,$res[$t])]+=1;
		}
		else  if(array_check($search,$res[$t])==0)
		{
		$search[count($search)] =$res[$t];

		$num[count($num)] =1;

		}
	}
}
}
print_r($search);
echo "<br>";
print_r($num);
echo "<br>";
for ($y =0; $y <= count($terms); $y++)
{
	for ($q =0; $q <= count($search)-1; $q++)
	{
		if($num[$q] == $y)
		{
		echo "<a href=\"".$search[$y]."\">".$search[$y]."</a> <br>";
		}			
	}
}

?>

 

here is the example xml file

 

<?xml version="1.0" encoding="utf-8"?>

<searchdb>

<under>index.html</under>

<over>smart.html</over>

<death>index.html</death>

<cool>index.html</cool>

<nice>smart.html</nice>

<boo>foo.html</boo>

</searchdb>

 

could somone please help me out here