Detailed explanation of WeChat payment development transaction notification example code

This article mainly introduces how to get transaction notifications when using JS API to pay, and provides code examples. I hope it will be helpful to partners who develop WeChat payment

1. Transaction notifications

After the user successfully completes the payment, the WeChat backend notifies (POST) the merchant server (notify_url) of the payment result. Merchants can use the notification results of notify_url to display personalized pages.

When interacting with background notifications, if the response received by WeChat from the merchant is not success or times out, WeChat will not fail the notification. WeChat will regularly re-initiate the notification through a certain strategy (such as 8 times in 30 minutes). It may improve the success rate of notifications, but WeChat does not guarantee that notifications will ultimately be successful.

Background notification is performed through notify_url in the request, using the POST mechanism.

At the same time, xml data will also be included in postData.

2. Obtaining and responding to transaction results

According to the official documentation, create notice.php to notify the results.

The program content is as follows:

$value) { logger("Key: $key; Value: $value"); } $postStr = $GLOBALS["HTTP_RAW_POST_DATA"]; logger($postStr); if (isset($_GET)){ echo "success"; } //日志记录 function logger($log_content) { $max_size = 100000; $log_filename = "log.xml"; if(file_exists($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); } ?>

The function of the above program is:

Get the notifications posted to the url, they are in the form of GET variables

Get the XML data packet of the post

Return the success message success

Put the full path of notice.php into the JS API Payment notice url.

$wxPayHelper->setParameter("notify_url", http://www.doucube.com/wxpay/notice.php);

In this way, when the transaction is completed, the url will receive a notification and be recorded in the log file. Our test is as follows:

The obtained GET variables and XML are as follows:

Key: bank_billno; Value: 201405273540085997 Key: bank_type; Value: 2011 Key: discount; Value: 0 Key: fee_type; Value: 1 Key: input_charset; Value: GBK Key: notify_id; Value: Gx8ov6tT6_yaARrtKG6RFZ4KiVtKqVnJzvulFlteJ3dhBg38iRtKs0pTXXfgh8WnH15mIhG6j65ggbzzYguh1mutG3B5oHsK Key: out_trade_no; Value: JfuKdiBig4zZnE4n Key: partner; Value: 1234567890 Key: product_fee; Value: 1 Key: sign; Value: 08876C4A9F7A36A9EA972C211C122362 Key: sign_type; Value: MD5 Key: time_end; Value: 20140527194139 Key: total_fee; Value: 1 Key: trade_mode; Value: 1 Key: trade_state; Value: 0 Key: transaction_id; Value: 1218614901201405273313473135 Key: transport_fee; Value: 0   1 1401190899    

And you will receive an OK pop-up window in the WeChat window

The above is the information for developing transaction notifications for WeChat payment Organized, thank you for your support!

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