Element Namer

<?php
include('dbcon.php');
$getions = mysql_query("SELECT * FROM ions");
$elements = array();
$charges = array();
$ides = array("oxygen" => "oxide", "nitrogen" => "nitride", "flourine" => "flouride", "phosphorus" => "phosphide", "sulfur" => "sulfide", "chlorine" => "chloride", "arsenic" => "arsenide", "bromine" => "bromide", "iodine" => "iodide");
function toIde($element) {
global $ides;
$out = $ides[$element];
return $out;
}
while($result = mysql_fetch_array($getions)) {
        array_push($elements,$result['name']);
        array_push($charges, $result['charges']);
}
function getElementCharge($element) {
global $elements, $charges;
    $key = array_search($element, $elements);
    $charge = $charges[$key];
    return $charge;
}

function nameCompound($element1, $element2) {
global $elements, $charges;
$arr = array($element1, $element2);
$name1 ="";
$name2="";
    foreach($arr as $i) {
    $charge = getElementCharge($i);
    if($charge > 0) {
    $name1 = $i;
    }
    else if($charge < 0) {
    $name2 = $i;
    }
    }
    return $name1 . toIde($name2);
}

print nameCompound("oxygen","lithium");
?>