Php array Conversion Problems

I want to know why it is used to determine that this is an array of data that has been traversed after the infinitus classification.

I want to know why I use it to determine

This is an array of data that has been traversed after the infinitus classification.

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I want to know why I use it to determine

This is an array of data that has been traversed after the infinitus classification.

If he is determined to be a father, he will not be able to pretend to be a turtle son. This is probably the meaning.
Determine whether the parent node field name defined by this array exists. If yes, it is placed in the result tree. If not, it is placed in the position of the husband node pointed to by this array. Assign a reference to all the slave nodes, and then attach the child nodes to the slave node one by one, therefore, you can operate on both the result tree and the original array.
That's probably the case...