How to save pairs of data into an one array - php

Question

I have XML file where I have name of currency and rate. I want to save those currencies and rate as pairs into an array, but it doesnt work, when I echo the array with foreach only last one appears.
Here's my code:
<?php
$xml = simplexml_load_file("http://www.ecb.int/stats/eurofxref/eurofxref-daily.xml");
$array=array();
foreach ($xml->children() as $cubeMain) {
foreach ($cubeMain->children() as $cubeTime) {
echo "Kursid seisuga: " . $cubeTime['time'];
foreach ($cubeTime->children() as $cubeCurr) {
$currency=$cubeCurr['currency'];
$rate=$cubeCurr['rate'];
$array = array((string)$currency => $rate);
echo $currency . " " . $rate . "<br />";
}
}
}
foreach ($array as $currency => $rate){
echo "$currency: $rate\n";
}
?>

Answer 1

try
$array[(string)$currency] = $rate;
instead of
$array = array((string)$currency => $rate);

Answer 2

If you expect to have several currency + rate couples, you'll want an array that contains sub-items, each one being made of currency + rate.
Typically, you'll first initialize your array :
$array = array();
Then, for each currency, you'll add an item into that array :
$array[] = array((string)$currency => $rate);
With that, you'll have a long list, but not indexed by currency -- which might not be that useful.
You'll probably, instead, prefer going with this second solution :
$array[(string)$currency] = $rate;
With that, your array will have the currency as key -- which make it much easier to find your data back, later.
Going with the second solution, your array is indexed by currency.
Which means you can find the rate for a specific currency this way :
echo $array['EUR']; // if EUR is an exinsting currency
And loop over all data like this :
foreach ($array as $currency => $rate) {
echo "$currency : $rate <br />";
}