PHP微信开发入门（一）

摘要: 微信公众平台的接入

微信的接入在填写服务器URL时指向TOKEN验证的php文件，列如http://localhost/wlink.php

验证示例代码

<?php
//如果接收到验证信息则调用valid()函数进行验证
if (isset ( $_GET ['echostr'] )) {
valid ();
} else {
//如果接收到的是微信客户端的消息则实例化回复类将OPENID传递给回复类的responseMsg()方法.
@$Wechart = new Answer();
@$openid = $_GET ['openid'];
@$Wechart->responseMsg ( $openid );
}

//验证TOKEN后输出验证
function valid() {
$echoStr = $_GET ["echostr"];
if (checkSignature ()) {
echo $echoStr;
exit ();
}
}
//验证TOKEN算法
function checkSignature() {
if (! defined ( "TOKEN" )) {
throw new Exception ( 'TOKEN is not defined!' );
}
$signature = $_GET ["signature"];
$timestamp = $_GET ["timestamp"];
$nonce = $_GET ["nonce"];
$token = TOKEN;
$tmpArr = array (
$token,
$timestamp,
$nonce
);
sort ( $tmpArr, SORT_STRING );
$tmpStr = implode ( $tmpArr );
$tmpStr = sha1 ( $tmpStr );

if ($tmpStr == $signature) {
return true;
} else {
return false;
}
}
?>

通过上述代码，我们就能通过微信的Token验证，在公众平台上面完成接入了。