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Isn’t there null in the post form data? Why does foreach not report an error? ? ? ?

I reported an error like this after executing it

Invalid argument supplied for foreach()

大月半仙狗大月半仙狗2317 days ago1513

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  • The Count of Monte Cristo

    The Count of Monte Cristo2019-03-04 13:41:28

    The following code has not been written yet. 0 0 You will know after writing the following if statement

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  • 张无言

    张无言2018-12-01 13:19:05

    I also encountered this problem. Did the original poster solve it?

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    • The Count of Monte Cristo

    What's the problem

    — The Count of Monte Cristo · 2019-03-04 13:41:41
  • 无忌哥哥

    无忌哥哥2018-07-11 10:35:39

    It is necessary to make a judgment if it is empty

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    • 大月半仙狗

    Yes, foreach will assign the empty value to 0. Just now, ord was not assigned a value.

    — 大月半仙狗 · 2018-07-11 11:09:26
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