WeChat scan code payment mode 2
There is an order number and a product number. What do these two do? I looked it up and it seems that only the order number has an effect, and the product number has no effect. The problem is that if an order is scanned but the payment is not successful, the QR code will not be generated if the payment is made again. Then the order number is unique. How to generate the QR code repeatedly?
The scan code payment is not synchronized. Is it true that once I scan it, I can’t refresh and call the QR code again?
The new order number can be processed and paid normally. Also, can QR code payment be able to jump to the web page if the payment is successful like Alipay? This can be achieved by obtaining order information through ajax.
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WeChat scan code payment mode 2
There is an order number and a product number. What do these two do? I looked it up and it seems that only the order number has an effect, and the product number has no effect. The problem is that if an order is scanned but the payment is not successful, the QR code will not be generated if the payment is made again. Then the order number is unique. How to generate the QR code repeatedly?
The scan code payment is not synchronized. Is it true that once I scan it, I can’t refresh and call the QR code again?
The new order number can be processed and paid normally. Also, can QR code payment be able to jump to the web page if the payment is successful like Alipay? This can be achieved by obtaining order information through ajax.
The QR code has a timeout, which is the SetTime_expire in the sdk. If the payment has timed out and has not been paid, you can no longer use the same order number to obtain the QR code, and it will prompt that the order number is repeated. If there is no timeout or payment, you can obtain the QR code again.
In terms of business, save this time in the order. If it times out, regenerate a payment order number. Because this number needs to be regenerated after timeout and unpaid, it is best not to change the website order number. Therefore, this WeChat payment order number can be recorded in a separate field to distinguish it from the order number of the website itself.
Use the payment number to check the order results regularly through ajax. When the payment is found, the database order status is updated and the page jumps.

php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

php判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

在PHP中,可以利用implode()函数的第一个参数来设置没有分隔符,该函数的第一个参数用于规定数组元素之间放置的内容,默认是空字符串,也可将第一个参数设置为空,语法为“implode(数组)”或者“implode("",数组)”。

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。


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