Optimisch queries

[fdas fdsa]

Hello,
I have made a php script that generates a map. A tempel is short of a control tower the tower with more believe(power) will win more land. There are a lot of other scripts involved but they are not intresting.
The generation of the map will take about 6 minutes but the cpu usage is only at 20%. Is there a better way to make this script.

The table Bl_Chunks is the map.
It has X and Y varibles for location.
BelieveFromArea is for how much control is there
Faction is who is the owner of the land.

CREATE TABLE `Bl_Chunks` (
`ID` int(11) NOT NULL AUTO_INCREMENT,
`X` smallint(6) NOT NULL,
`Z` smallint(6) DEFAULT NULL,
`HasTemple` tinyint(1) DEFAULT '0',
`TotalBelieve` int(10) unsigned DEFAULT '0',
`BelieveFromArea` int(10) unsigned DEFAULT '0',
`BelieveIncrease` int(10) unsigned NOT NULL DEFAULT '0',
`Faction` text NOT NULL,
PRIMARY KEY (`ID`),
UNIQUE KEY `unique_ID` (`ID`)
) ENGINE=InnoDB AUTO_INCREMENT=334843 DEFAULT CHARSET=latin1


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<?php
echo "<br>";
$start = microtime(true);
set_time_limit(10000);

//Sends a query
function SqlGet($conn,$sql,$return) {
try {
$stmt = $conn->prepare($sql);
$stmt->execute();
$stmt->setFetchMode(PDO::FETCH_ASSOC);
if ($return) {
return $stmt->fetchAll();
} else {
return array();
}


}catch (PDOException $e){
echo "Connection failed: " . $e->getMessage();
return array();
}
}

//This funtion will calculate how much believe a piece of land gets from a tempel based on the distance and the power of the tempel
function GetEffect($chunk,$tempel) {
$tempelpower = $tempel['TotalBelieve'];
$distance = sqrt(pow($tempel['X'] - $chunk['X'], 2) + pow($tempel['Z'] - $chunk['Z'], 2));
$distance = $distance/5;
if ($distance>=20) {
return 0;
}else {
return $tempelpower / (pow(2, $distance));
}
}

//Gets all the tempels
$tempels = SqlGet($conn,"SELECT * FROM Bl_Chunks WHERE HasTemple=1",true);








//Goes trow each line.
//You can't select all of the chunks(pieces of land) because it would be to much data.
for ($x=-182; $x<= 193; $x++) {
//Select a line of chunks
$chunks = SqlGet($conn,"SELECT * FROM Bl_Chunks WHERE X=$x AND HasTemple=0",true);
foreach ($chunks as $chunk) {
$bestvalue = 0;
$faction = 0;
$id = $chunk['ID'];
//Goes throw each tempels and looks wich is the best.
foreach ($tempels as $tempel) {
$value = GetEffect($chunk, $tempel);
if ($value > $bestvalue) {
$bestvalue = $value;
$faction = $tempel['Faction'];
}
}

$intbest = 0;
if (floor($bestvalue)==0) {
$intbest = 0;
$faction = 0;
}else {
$intbest=floor($bestvalue);
}
//Updates the chunk
$sql = "UPDATE Bl_Chunks SET BelieveFromArea=$intbest,Faction=$faction WHERE ID= $id";
SqlGet($conn, $sql, false);
}
SqlGet($conn, $sql , false);
}

?>

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Thank you in advanced