如何使用 PHP 实现微信公众号开发和接口对接

<?php
define("TOKEN", "your_token");

$signature = $_GET["signature"];
$timestamp = $_GET["timestamp"];
$nonce = $_GET["nonce"];
$echostr = $_GET["echostr"];

$tmpArr = array(TOKEN, $timestamp, $nonce);
sort($tmpArr, SORT_STRING);
$tmpStr = implode($tmpArr);
$tmpStr = sha1($tmpStr);

if ($tmpStr == $signature) {
    echo $echostr;
} else {
    echo "error";
}

<?php
function responseText($toUsername, $fromUsername, $content){
    $textTpl = "<xml>
    <ToUserName><![CDATA[%s]]></ToUserName>
    <FromUserName><![CDATA[%s]]></FromUserName>
    <CreateTime>%s</CreateTime>
    <MsgType><![CDATA[text]]></MsgType>
    <Content><![CDATA[%s]]></Content>
    </xml>";
    
    $time = time();
    $result = sprintf($textTpl, $toUsername, $fromUsername, $time, $content);
    echo $result;
}

$rawXml = file_get_contents("php://input");
$xml = simplexml_load_string($rawXml);

$toUsername = $xml->ToUserName;
$fromUsername = $xml->FromUserName;
$content = $xml->Content;

responseText($fromUsername, $toUsername, "你发送的消息是：".$content);