Instance sharing of php algorithm

This article mainly introduces "instance sharing of php algorithm". In daily operation, I believe many people have doubts about the problem of instance sharing of php algorithm. The editor consulted all kinds of data and sorted out simple and easy-to-use operation methods. I hope it will be helpful for you to answer the doubts of "instance sharing of php algorithm"! Next, please follow the editor to study!

Print only 0

The specific number is determined by the input parameter n

Print 00000 if you want to buy 5.

Print one line 0101010101010101010101010101

The specific number is determined by the input parameter n

Such as test.php?n=3 print 010

Achieve 1 00 111 0000 11111

For if implementation

For switch implementation

While if implementation

While switch implementation

To achieve 0.001 010 0101.

Achieve 0 01 012 0123 10 10 0

Make a calculator

Such as test.php?a=1&b=2&operator=jia output 3

Such as test.php?a=5&b=2&operator=jian output 3

For example, test.php?a=2&b=5&operator=cheng output 10

Such as test.php?a=6&b=3&operator=chu output 2

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