易信 php 验证接口

php下的易信验证接口

$signature = $_GET['signature'];
$timestamp = $_GET['timestamp'];
$nonce = $_GET['nonce'];
$token="1LYURrl3b89L";//可改，复制到易信token处

//组合
$signatureArray = array($token, $timestamp, $nonce);
//字典排序
sort($signatureArray);
//sha1加密、验证
if( sha1(implode($signatureArray)) == $signature){
echo $_GET['echostr'];
}