php教程php手册After the token verification of WeChat subscription account development, the automatic reply message function is ready and the message is sent.
I believe many people will be like me. After the token is verified, a message is sent to the subscription account, but no message is returned. Below, let me talk about the solution I got through hard debugging: First, token verification: The token I wrote has always failed to verify. I searched for it for a long time, but no bug was found. There was really no other way, so I used the official sample code. And through debugging the sample code, I found
I believe many people will be like me. After the token is verified, a message is sent to the subscription account, but no message is returned.
The following is the solution I got through hard debugging:
First, token verification:
The token I wrote has always failed to verify. I have been looking for it for a long time, but no bug has been found. There was really no other way, so I used the official sample code. And through debugging the sample code, I found a bug that made me vomit blood (not a bug):
Token verification seems to require character encoding format! ! ! !
The official sample code is uploaded directly to the server, and the token is passed directly!
Changed the official sample code to UTF-8 format, and then uploaded it to overwrite it. Token failed! Failed! fail!
Later, I changed what I wrote to ANSI format and the token still failed! Drunk, drunk! Then you have to use the official sample code. Here, let me say that token is a one-time handshake verification , and it is no longer needed after verification once.
Now, let’s get back to the topic, I seem to have digressed...orz
After the token verification, I directly used the official sample code to quickly test my subscription account. As a result... the message sent out was like water poured out, and nothing was returned...orz
I searched for bugs in various ways, asked in various groups, searched in various ways... After the efforts of this blogger, I finally found out the problem (here it refers to the one I developed myself, not the one I developed myself). Including all, if you have different bugs, welcome to communicate):
1. The most easily overlooked bug is that the official sample code does not call the written responseMsg() function at all!
2. Comment out the previous token code, which is the line of code $wechatObj->valid();. Because there will be an echo $echostr in the toke verification code, the echo $resultStr; (line 56) in the responseMsg() function will be in a confusing xml format, and it will not be recognized when it is input back to the WeChat server (it seems Only xml format and json format can be recognized). (Token verification is a handshake verification. After verifying the developer, it is no longer needed. Let it disappear in our neat code orz...)
3. The most disgusting bug is the character encoding problem! orz...xml requires UTF-8 encoding, so, change the sample code back to UTF-8 encoding! This bug makes me collapse! ! !
The following is my modified code. It can run normally and has no bugs. You can refer to it if you need it
<span style="color: #008080;"> 1</span> <span style="color: #000000;">php
</span><span style="color: #008080;"> 2</span> <span style="color: #008000;">/*</span><span style="color: #008000;">*
</span><span style="color: #008080;"> 3</span> <span style="color: #008000;"> * wechat php test
</span><span style="color: #008080;"> 4</span> <span style="color: #008000;">*/</span>
<span style="color: #008080;"> 5</span>
<span style="color: #008080;"> 6</span> <span style="color: #008000;">//</span><span style="color: #008000;">define your token</span>
<span style="color: #008080;"> 7</span> <span style="color: #008080;">define</span>("TOKEN", "codcodog"<span style="color: #000000;">);
</span><span style="color: #008080;"> 8</span>
<span style="color: #008080;"> 9</span> <span style="color: #800080;">$wechatObj</span> = <span style="color: #0000ff;">new</span><span style="color: #000000;"> wechatCallbackapiTest();
</span><span style="color: #008080;">10</span> <span style="color: #008000;">//</span><span style="color: #008000;">$wechatObj->valid();</span>
<span style="color: #008080;">11</span> <span style="color: #800080;">$wechatObj</span>-><span style="color: #000000;">responseMsg();
</span><span style="color: #008080;">12</span>
<span style="color: #008080;">13</span> <span style="color: #0000ff;">class</span><span style="color: #000000;"> wechatCallbackapiTest
</span><span style="color: #008080;">14</span> <span style="color: #000000;">{
</span><span style="color: #008080;">15</span> <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> valid()
</span><span style="color: #008080;">16</span> <span style="color: #000000;"> {
</span><span style="color: #008080;">17</span> <span style="color: #800080;">$echoStr</span> = <span style="color: #800080;">$_GET</span>["echostr"<span style="color: #000000;">];
</span><span style="color: #008080;">18</span>
<span style="color: #008080;">19</span> <span style="color: #008000;">//</span><span style="color: #008000;">valid signature , option</span>
<span style="color: #008080;">20</span> <span style="color: #0000ff;">if</span>(<span style="color: #800080;">$this</span>-><span style="color: #000000;">checkSignature()){
</span><span style="color: #008080;">21</span> <span style="color: #008080;">header</span>('content-type:text'<span style="color: #000000;">);
</span><span style="color: #008080;">22</span> <span style="color: #0000ff;">echo</span> <span style="color: #800080;">$echoStr</span><span style="color: #000000;">;
</span><span style="color: #008080;">23</span> <span style="color: #0000ff;">exit</span><span style="color: #000000;">;
</span><span style="color: #008080;">24</span> <span style="color: #000000;"> }
</span><span style="color: #008080;">25</span> <span style="color: #000000;"> }
</span><span style="color: #008080;">26</span>
<span style="color: #008080;">27</span> <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> responseMsg()
</span><span style="color: #008080;">28</span> <span style="color: #000000;"> {
</span><span style="color: #008080;">29</span> <span style="color: #008000;">//</span><span style="color: #008000;">get post data, May be due to the different environments</span>
<span style="color: #008080;">30</span> <span style="color: #800080;">$postStr</span> = <span style="color: #800080;">$GLOBALS</span>["HTTP_RAW_POST_DATA"<span style="color: #000000;">];
</span><span style="color: #008080;">31</span> <span style="color: #008000;">//</span><span style="color: #008000;">$postStr = file_get_contents("php://input");</span>
<span style="color: #008080;">32</span> <span style="color: #008080;">file_put_contents</span>("log.txt",<span style="color: #800080;">$postStr</span>,<span style="color: #000000;">FILE_APPEND );
</span><span style="color: #008080;">33</span> <span style="color: #008000;">//</span><span style="color: #008000;">extract post data</span>
<span style="color: #008080;">34</span> <span style="color: #0000ff;">if</span> (!<span style="color: #0000ff;">empty</span>(<span style="color: #800080;">$postStr</span><span style="color: #000000;">)){
</span><span style="color: #008080;">35</span> <span style="color: #008000;">/*</span><span style="color: #008000;"> libxml_disable_entity_loader is to PRevent XML eXternal Entity Injection,
</span><span style="color: #008080;">36</span> <span style="color: #008000;"> the best way is to check the validity of xml by yourself </span><span style="color: #008000;">*/</span>
<span style="color: #008080;">37</span> libxml_disable_entity_loader(<span style="color: #0000ff;">true</span><span style="color: #000000;">);
</span><span style="color: #008080;">38</span> <span style="color: #800080;">$postObj</span> = <span style="color: #008080;">simplexml_load_string</span>(<span style="color: #800080;">$postStr</span>, 'SimpleXMLElement',<span style="color: #000000;"> LIBXML_NOCDATA);
</span><span style="color: #008080;">39</span> <span style="color: #800080;">$fromUsername</span> = <span style="color: #800080;">$postObj</span>->FromUserName; <span style="color: #008000;">//</span><span style="color: #008000;">用户</span>
<span style="color: #008080;">40</span> <span style="color: #800080;">$toUsername</span> = <span style="color: #800080;">$postObj</span>->ToUserName; <span style="color: #008000;">//</span><span style="color: #008000;">公众平台</span>
<span style="color: #008080;">41</span> <span style="color: #800080;">$keyWord</span> = <span style="color: #008080;">trim</span>(<span style="color: #800080;">$postObj</span>-><span style="color: #000000;">Content);
</span><span style="color: #008080;">42</span> <span style="color: #800080;">$time</span> = <span style="color: #008080;">time</span><span style="color: #000000;">();
</span><span style="color: #008080;">43</span> <span style="color: #800080;">$textTpl</span> = "<span style="color: #000000;"><xml>
</xml></span><span style="color: #008080;">44</span> <span style="color: #000000;"> <tousername></tousername>
</span><span style="color: #008080;">45</span> <span style="color: #000000;"> <fromusername></fromusername>
</span><span style="color: #008080;">46</span> <span style="color: #000000;"> <createtime>%s</createtime>
</span><span style="color: #008080;">47</span> <span style="color: #000000;"> <msgtype></msgtype>
</span><span style="color: #008080;">48</span> <span style="color: #000000;"> <content></content>
</span><span style="color: #008080;">49</span> <span style="color: #000000;"> <funcflag>0</funcflag>
</span><span style="color: #008080;">50</span> "<span style="color: #000000;">;
</span><span style="color: #008080;">51</span> <span style="color: #0000ff;">if</span>(!<span style="color: #0000ff;">empty</span>( <span style="color: #800080;">$keyword</span><span style="color: #000000;"> ))
</span><span style="color: #008080;">52</span> <span style="color: #000000;"> {
</span><span style="color: #008080;">53</span> <span style="color: #800080;">$msgType</span> = "text"<span style="color: #000000;">;
</span><span style="color: #008080;">54</span> <span style="color: #800080;">$contentStr</span> = "Welcome to wechat world!"<span style="color: #000000;">;
</span><span style="color: #008080;">55</span> <span style="color: #800080;">$resultStr</span> = <span style="color: #008080;">sprintf</span>(<span style="color: #800080;">$textTpl</span>, <span style="color: #800080;">$fromUsername</span>, <span style="color: #800080;">$toUsername</span>, <span style="color: #800080;">$time</span>, <span style="color: #800080;">$msgType</span>, <span style="color: #800080;">$contentStr</span><span style="color: #000000;">);
</span><span style="color: #008080;">56</span> <span style="color: #0000ff;">echo</span> <span style="color: #800080;">$resultStr</span><span style="color: #000000;">;
</span><span style="color: #008080;">57</span> }<span style="color: #0000ff;">else</span><span style="color: #000000;">{
</span><span style="color: #008080;">58</span> <span style="color: #0000ff;">echo</span> "Input something..."<span style="color: #000000;">;
</span><span style="color: #008080;">59</span> <span style="color: #000000;"> }
</span><span style="color: #008080;">60</span>
<span style="color: #008080;">61</span> }<span style="color: #0000ff;">else</span><span style="color: #000000;"> {
</span><span style="color: #008080;">62</span> <span style="color: #0000ff;">echo</span> ""<span style="color: #000000;">;
</span><span style="color: #008080;">63</span> <span style="color: #0000ff;">exit</span><span style="color: #000000;">;
</span><span style="color: #008080;">64</span> <span style="color: #000000;"> }
</span><span style="color: #008080;">65</span> <span style="color: #000000;"> }
</span><span style="color: #008080;">66</span>
<span style="color: #008080;">67</span> <span style="color: #0000ff;">private</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> checkSignature()
</span><span style="color: #008080;">68</span> <span style="color: #000000;"> {
</span><span style="color: #008080;">69</span> <span style="color: #008000;">//</span><span style="color: #008000;"> you must define TOKEN by yourself</span>
<span style="color: #008080;">70</span> <span style="color: #0000ff;">if</span> (!<span style="color: #008080;">defined</span>("TOKEN"<span style="color: #000000;">)) {
</span><span style="color: #008080;">71</span> <span style="color: #0000ff;">throw</span> <span style="color: #0000ff;">new</span> <span style="color: #0000ff;">Exception</span>('TOKEN is not defined!'<span style="color: #000000;">);
</span><span style="color: #008080;">72</span> <span style="color: #000000;"> }
</span><span style="color: #008080;">73</span>
<span style="color: #008080;">74</span> <span style="color: #800080;">$signature</span> = <span style="color: #800080;">$_GET</span>["signature"<span style="color: #000000;">];
</span><span style="color: #008080;">75</span> <span style="color: #800080;">$timestamp</span> = <span style="color: #800080;">$_GET</span>["timestamp"<span style="color: #000000;">];
</span><span style="color: #008080;">76</span> <span style="color: #800080;">$nonce</span> = <span style="color: #800080;">$_GET</span>["nonce"<span style="color: #000000;">];
</span><span style="color: #008080;">77</span>
<span style="color: #008080;">78</span> <span style="color: #800080;">$token</span> =<span style="color: #000000;"> TOKEN;
</span><span style="color: #008080;">79</span> <span style="color: #800080;">$tmpArr</span> = <span style="color: #0000ff;">array</span>(<span style="color: #800080;">$token</span>, <span style="color: #800080;">$timestamp</span>, <span style="color: #800080;">$nonce</span><span style="color: #000000;">);
</span><span style="color: #008080;">80</span> <span style="color: #008000;">//</span><span style="color: #008000;"> use SORT_STRING rule</span>
<span style="color: #008080;">81</span> <span style="color: #008080;">sort</span>(<span style="color: #800080;">$tmpArr</span>,<span style="color: #000000;"> SORT_STRING);
</span><span style="color: #008080;">82</span> <span style="color: #800080;">$tmpStr</span> = <span style="color: #008080;">implode</span>( <span style="color: #800080;">$tmpArr</span><span style="color: #000000;"> );
</span><span style="color: #008080;">83</span> <span style="color: #800080;">$tmpStr</span> = <span style="color: #008080;">sha1</span>( <span style="color: #800080;">$tmpStr</span><span style="color: #000000;"> );
</span><span style="color: #008080;">84</span>
<span style="color: #008080;">85</span> <span style="color: #0000ff;">if</span>( <span style="color: #800080;">$tmpStr</span> == <span style="color: #800080;">$signature</span><span style="color: #000000;"> ){
</span><span style="color: #008080;">86</span> <span style="color: #0000ff;">return</span> <span style="color: #0000ff;">true</span><span style="color: #000000;">;
</span><span style="color: #008080;">87</span> }<span style="color: #0000ff;">else</span><span style="color: #000000;">{
</span><span style="color: #008080;">88</span> <span style="color: #0000ff;">return</span> <span style="color: #0000ff;">false</span><span style="color: #000000;">;
</span><span style="color: #008080;">89</span> <span style="color: #000000;"> }
</span><span style="color: #008080;">90</span> <span style="color: #000000;"> }
</span><span style="color: #008080;">91</span> <span style="color: #000000;">}
</span><span style="color: #008080;">92</span>
<span style="color: #008080;">93</span>
<span style="color: #008080;">94</span> ?>
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