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This article mainly talks about "what are the parameters passed between php functions". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "what are the parameters passed between php functions"?

Php: parameter passing between functions

1. Value transfer

The copy code is as follows:

Output result:

one

In Exam: 2

one

two。 Reference transfer

The copy code is as follows:

Output result:

one

In Exam: 2

two

3. Optional parameter

The copy code is as follows:

Function values ($price, $tax= "") {

$price + = $prive * $tax

Echo "Total Price:". $price. "

}

Values (100,0.25)

Values (100)

Output result:

Total Price: 125

Total Price: 100

4. If you pass in an object, you can change the value of that object

(in fact, the variable $obj records the handle to the object, passing in $obj as an argument, which makes it possible to manipulate the original object. )

The copy code is as follows:

Output result:

Mr. Zhan 12 male

Mr. Zhan 13 male

Mr. Zhan 14 male

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