PHP multidimensional array array sorting

Call the usort() function to customize the sorting function. It must receive two parameters. The first parameter is the array to be sorted, and the second parameter is a callback function. It returns true if the sorting is successful and false if it fails.
The callback function receives two parameters. When it returns false or a negative number, it means that the first parameter is ranked before the second parameter. When it returns true or a positive number, it means that the first parameter is ranked after the second parameter.

The code is as follows:

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