微信官方文档
接收普通消息（http://mp.weixin.qq.com/wiki/17/f298879f8fb29ab98b2f2971d42552fd.html）
接收事件推送（http://mp.weixin.qq.com/wiki/7/9f89d962eba4c5924ed95b513ba69d9b.html）
发送被动回复消息（http://mp.weixin.qq.com/wiki/1/6239b44c206cab9145b1d52c67e6c551.html）
没什么好说的，直接参照上面给出的文档。下面直接给出源码
<?php
/*
坚强di理由
http://blog.csdn.net/qczxl/
*/
$options = array(
'token'=>'542733246@qq.com', //填写你设定的key
'encodingaeskey'=>'123456', //填写加密用的EncodingAESKey
'appid'=>'wx0cea499e0542b251', //填写高级调用功能的app id
);
$weObj = new wechatCallbackapiTest($options);
switch($weObj->getValue('MsgType')) {
case 'text':
$content = $weObj->getValue('Content');
//业务处理...
break;
case 'event':
switch ($weObj->getValue('Event')) {
case "subscribe": // 关注
if(!empty($weObj->getValue('EventKey'))) { // 二维码参数值
//扫描带参数二维码，进行关注后的事件推送
}
//业务处理...
break;
case "unsubscribe": //取消关注
//业务处理...
break;
case "SCAN": //扫描带参数二维码（用户已关注时的事件推送）
$content = $weObj->getValue('EventKey'); // 二维码参数值
//业务处理...
break;
case "CLICK": //菜单 - 点击菜单拉取消息
$content = $weObj->getValue('EventKey'); // 设置的关键字
//业务处理...
break;
case "LOCATION": //上报地理位置
$lat = $weObj->getValue('Latitude'); //地理位置纬度
$lng = $weObj->getValue('Longitude'); //地理位置经度
//业务处理...
break;
case "VIEW": //菜单 - 点击菜单跳转链接
$content = $weObj->getValue('EventKey'); // 跳转链接
//业务处理...
break;
default:
//业务处理...
break;
}
break;
case 'image':
break;
case 'location':
break;
case 'voice':
break;
case 'video':
break;
case 'link':
break;
default:
echo '';
break;
}
class wechatCallbackapiTest {
private $token;
private $encodingAesKey;
private $encrypt_type;
private $appid;
private $postarr;
private $item = '';
public function __construct($options) {
$this->token = $options['token'];
$this->encodingAesKey = $options['encodingaeskey'];
$this->appid = $options['appid'];
$this->valid();
}
protected function checkSignature() {
$signature = $_GET["signature"];
$timestamp = $_GET["timestamp"];
$nonce = $_GET["nonce"];
$tmpArr = array($this->token, $timestamp, $nonce);
sort($tmpArr, SORT_STRING);
$tmpStr = sha1( implode( $tmpArr ) );
if( $tmpStr == $signature ){
return true;
}else{
return false;
}
}
public function valid() {
$encryptStr="";
if ($_SERVER['REQUEST_METHOD'] == "POST") {
$postStr = file_get_contents("php://input");
$array = (array)simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
$this->encrypt_type = isset($_GET["encrypt_type"]) ? $_GET["encrypt_type"] : '';
if($this->encrypt_type == 'aes') {
$pc = new Prpcrypt($this->encodingAesKey);
$array = $pc->decrypt($array['Encrypt'],$this->appid);
if (!isset($array[0]) || ($array[0] != 0)) {
echo '';exit;
}
$this->postarr = $array[1];
} else {
$this->postarr = $array;
}
} elseif (isset($_GET["echostr"])) {
if($this->checkSignature()) {
echo $_GET["echostr"];
exit;
}
}
}
public function getValue($key) {
if(isset($this->postarr[$key])) {
return $this->postarr[$key];
}
return '';
}
public function setHeaderDate($type) {
return array(
'ToUserName' => $this->getValue('FromUserName'),
'FromUserName' => $this->getValue('ToUserName'),
'CreateTime' => time(),
'MsgType' => $type
);
}
//回复文本消息
public function text($text='') {
$arr = array(
'Content' => $text
);
$this->sendReply(array_merge($this->setHeaderDate('text'),$arr));
}
/**
* 回复图文
* @param array $newsData
* 数组结构:
* array(
* "0"=>array(
* 'Title'=>'msg title',
* 'Description'=>'summary text',
* 'PicUrl'=>'http://www.domain.com/1.jpg',
* 'Url'=>'http://www.domain.com/1.html'
* ),
* )
*/
public function news($newsData=array()) {
$count = count($newsData);
$arr = array(
'ArticleCount' => $count,
'Articles' => $newsData
);
$this->item = 'item';
$this->sendReply(array_merge($this->setHeaderDate('news'),$arr));
}
/**
* 回复图片
* @param string $mediaid
*/
public function image($mediaid='')
{
$arr = array(
'Image'=>array('MediaId'=>$mediaid)
);
$this->sendReply(array_merge($this->setHeaderDate('image'),$arr));
}
/**
* 回复语音
* @param string $mediaid
*/
public function voice($mediaid='')
{
$arr = array(
'Voice'=>array('MediaId'=>$mediaid)
);
$this->sendReply(array_merge($this->setHeaderDate('voice'),$arr));
}
/**
* 回复视频
* @param string $mediaid
*/
public function video($mediaid='',$title='',$description='')
{
$arr = array(
'Video'=>array(
'MediaId'=>$mediaid,
'Title'=>$title,
'Description'=>$description
)
);
$this->sendReply(array_merge($this->setHeaderDate('video'),$arr));
}
/**
* 回复音乐
* @param string $title
* @param string $desc
* @param string $musicurl
* @param string $hgmusicurl
* @param string $thumbmediaid 音乐图片缩略图的媒体id，非必须
*/
public function music($title,$desc,$musicurl,$hgmusicurl='',$thumbmediaid='') {
$arr = array(
'Music'=>array(
'Title'=>$title,
'Description'=>$desc,
'MusicUrl'=>$musicurl,
'HQMusicUrl'=>$hgmusicurl
)
);
if ($thumbmediaid) {
$arr['Music']['ThumbMediaId'] = $thumbmediaid;
}
$this->sendReply(array_merge($this->setHeaderDate('music'),$arr));
}
//发送回复代码
public function sendReply($arr) {
$xmldata = $this->setXml($arr);
if ($this->encrypt_type == 'aes') {
$pc = new Prpcrypt($this->encodingAesKey);
$array = $pc->encrypt($xmldata, $this->appid);
$ret = $array[0];
if ($ret != 0) {
echo '';exit;
}
$timestamp = time();
$nonce = rand(77,999)*rand(605,888)*rand(11,99);
$encrypt = $array[1];
$tmpArr = array($this->token, $timestamp, $nonce, $encrypt);
sort($tmpArr, SORT_STRING);
$signature = implode($tmpArr);
$signature = sha1($signature);
$xmldata = $this->generate($encrypt, $signature, $timestamp, $nonce);
}
$this->logger("T ".$xmldata);
echo $xmldata;
}
/**
* xml格式加密，仅请求为加密方式时再用
*/
private function generate($encrypt, $signature, $timestamp, $nonce)
{
//格式化加密信息
$format = "<xml>
<Encrypt><![CDATA[%s]]></Encrypt>
<MsgSignature><![CDATA[%s]]></MsgSignature>
<TimeStamp>%s</TimeStamp>
<Nonce><![CDATA[%s]]></Nonce>
</xml>";
return sprintf($format, $encrypt, $signature, $timestamp, $nonce);
}
//数组组装xml
protected function arrayToXml($arr) {
$xml = '';
foreach ($arr as $key => $val) {
$key = is_numeric($key) ? $this->item : $key;
$xml .= "<$key>";
if(is_numeric($val)) {
$xml .= "$val";
} else {
$xml .= is_array($val) ? $this->arrayToXml($val) : '<![CDATA['.preg_replace("/[\\x00-\\x08\\x0b-\\x0c\\x0e-\\x1f]/",'',$val).']]>';
}
$xml .= "</$key>";
}
return $xml;
}
protected function setXml($arr) {
return "<xml>".$this->arrayToXml($arr)."</xml>";
}
//日志记录
private function logger($log_content)
{
$max_size = 10000;
$log_filename = "log.xml";
if(file_exists($log_filename) and (abs(filesize($log_filename)) > $max_size)){unlink($log_filename);}
file_put_contents($log_filename, date('H:i:s')." ".$log_content."\r\n", FILE_APPEND);
}
}
/*
+ =============================== +
+ +
+ 说明：以下代码为引入三方类库 +
+ 功能：加解密 +
+ +
+ =============================== +
*/
/**
* Prpcrypt class
*
* 提供接收和推送给公众平台消息的加解密接口.
*/
class Prpcrypt
{
public $key;
function __construct($k) {
$this->key = base64_decode($k . "=");
}
/**
* 兼容老版本php构造函数，不能在 __construct() 方法前边，否则报错
*/
function Prpcrypt($k)
{
$this->key = base64_decode($k . "=");
}
/**
* 对明文进行加密
* @param string $text 需要加密的明文
* @return string 加密后的密文
*/
public function encrypt($text, $appid)
{
try {
//获得16位随机字符串，填充到明文之前
$random = $this->getRandomStr();//"aaaabbbbccccdddd";
$text = $random . pack("N", strlen($text)) . $text . $appid;
// 网络字节序
$size = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);
$module = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');
$iv = substr($this->key, 0, 16);
//使用自定义的填充方式对明文进行补位填充
$pkc_encoder = new PKCS7Encoder;
$text = $pkc_encoder->encode($text);
mcrypt_generic_init($module, $this->key, $iv);
//加密
$encrypted = mcrypt_generic($module, $text);
mcrypt_generic_deinit($module);
mcrypt_module_close($module);
// print(base64_encode($encrypted));
//使用BASE64对加密后的字符串进行编码
return array(ErrorCode::$OK, base64_encode($encrypted));
} catch (Exception $e) {
//print $e;
return array(ErrorCode::$EncryptAESError, null);
}
}
/**
* 对密文进行解密
* @param string $encrypted 需要解密的密文
* @return string 解密得到的明文
*/
public function decrypt($encrypted, $appid)
{
try {
//使用BASE64对需要解密的字符串进行解码
$ciphertext_dec = base64_decode($encrypted);
$module = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');
$iv = substr($this->key, 0, 16);
mcrypt_generic_init($module, $this->key, $iv);
//解密
$decrypted = mdecrypt_generic($module, $ciphertext_dec);
mcrypt_generic_deinit($module);
mcrypt_module_close($module);
} catch (Exception $e) {
return array(ErrorCode::$DecryptAESError, null);
}
try {
//去除补位字符
$pkc_encoder = new PKCS7Encoder;
$result = $pkc_encoder->decode($decrypted);
//去除16位随机字符串,网络字节序和AppId
if (strlen($result) < 16)
return "";
$content = substr($result, 16, strlen($result));
$len_list = unpack("N", substr($content, 0, 4));
$xml_len = $len_list[1];
$xml_content = substr($content, 4, $xml_len);
$from_appid = substr($content, $xml_len + 4);
if (!$appid)
$appid = $from_appid;
//如果传入的appid是空的，则认为是订阅号，使用数据中提取出来的appid
} catch (Exception $e) {
//print $e;
return array(ErrorCode::$IllegalBuffer, null);
}
if ($from_appid != $appid)
return array(ErrorCode::$ValidateAppidError, null);
//不注释上边两行，避免传入appid是错误的情况
return array(0, $xml_content, $from_appid); //增加appid，为了解决后面加密回复消息的时候没有appid的订阅号会无法回复
}
/**
* 随机生成16位字符串
* @return string 生成的字符串
*/
function getRandomStr()
{
$str = "";
$str_pol = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz";
$max = strlen($str_pol) - 1;
for ($i = 0; $i < 16; $i++) {
$str .= $str_pol[mt_rand(0, $max)];
}
return $str;
}
}
/**
* error code
* 仅用作类内部使用，不用于官方API接口的errCode码
*/
class ErrorCode
{
public static $OK = 0;
public static $ValidateSignatureError = 40001;
public static $ParseXmlError = 40002;
public static $ComputeSignatureError = 40003;
public static $IllegalAesKey = 40004;
public static $ValidateAppidError = 40005;
public static $EncryptAESError = 40006;
public static $DecryptAESError = 40007;
public static $IllegalBuffer = 40008;
public static $EncodeBase64Error = 40009;
public static $DecodeBase64Error = 40010;
public static $GenReturnXmlError = 40011;
public static $errCode=array(
'0' => '处理成功',
'40001' => '校验签名失败',
'40002' => '解析xml失败',
'40003' => '计算签名失败',
'40004' => '不合法的AESKey',
'40005' => '校验AppID失败',
'40006' => 'AES加密失败',
'40007' => 'AES解密失败',
'40008' => '公众平台发送的xml不合法',
'40009' => 'Base64编码失败',
'40010' => 'Base64解码失败',
'40011' => '公众帐号生成回包xml失败'
);
public static function getErrText($err) {
if (isset(self::$errCode[$err])) {
return self::$errCode[$err];
}else {
return false;
};
}
}
拿走直接运行，就这么简单。