The value of two variables is not exchanged in PHP without a third variable

Source: Internet
Author: User

I believe that everyone in the PHP interview or study often encounter this problem is "do not use the third variable to exchange the value of two variables," Today is to discuss this issue;

The first approach: the first thing you'll think about

This method is simple and feasible, and the value of two variables is exchanged smoothly.

The second way, a little bit of thinking, we'll use the PHP function to implement

The third way, we can use PHP to provide a variety of string segmentation functions to achieve.

The simple topic of different ideas will have different solutions, expecting more answers.

The value of two variables is not exchanged in PHP without a third variable

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