What are the parameters passed between php functions
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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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