How can we use multiple nestings of if statements in PHP process control? ? ?

The previous article introduced you to "Let's learn about the nested if else if structure of PHP process control! ! !》, this article continues to introduce to you the multiple nesting of if statements in PHP process control: Let's Go!!!

What are multiple if statements? Kinds of nesting:

One or more if statements can be nested in an if statement to realize the judgment of multiple parameters. It is a variety of nesting of if statements. Its structure is as follows:

The following is a specific code demonstration, as follows:

The code running results are as follows:

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