Unexpected Symbol in string implode
<p>I am using implode to create a query string but there is an unexpected symbol appearing in it and im unsure where it is coming from</p>

<p>If anyone has any insight it would be much appreciated. </p>

<pre><code>$url = "https://mypay.com/billing/signup.cgi";



$key = "11";
$key .= "11";
$key .= "GBP";
$key .= "QQDNfAHlC2WEEfhfhFFdhbdf";

$variables[] = "?formDigest=".md5($key);
$variables[] = "clientAccnum=1111";
$variables[] = "clientSubacc=1111";
$variables[] = "formName=108ck";
$variables[] = "formPrice=11";
$variables[] = "formPeriod=11";
$variables[] = "currencyCode=GBP";


$url .= implode("&amp;", $variables);

echo $url;
</code></pre>

<p>The String </p>

<p><code>https://bill.ccbill.com/jpost/signup.cgi?formDigest=df03f2b103f79bd5de34c6cfea405ec5&amp;clientAccnum=1111&amp;clientSubacc=1111&amp;formName=108ck&amp;formPrice=11&amp;formPeriod=11¤cyCode=GBP</code> </p>

<p>notice the <code>¤</code> symbol where currencyCode should be.</p>

<p>Thanks for the help guys!</p>
