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Editor to share with you how to use the PHP class access modifier, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

PHP class access modifier

Description:

Access modifiers are used to control access to members

Modifier

Description

Public (publicly owned

Can be accessed both inside and outside the class, unrestricted access (public)

Protected (protected

Within the class, and the subclasses of the class can be accessed.

Private (private

Can only be accessed within the class

Learn one more trick:

In general, properties are private. Private attributes are assigned and valued by public methods. This practice can filter the data and ensure the legitimacy of the data.

Class Student {public $name='qingyu'; private $sex = 'male'; / / assign private attributes through a public method public function set_sex ($sex) {if ($sexuality 'male' & & $sexualized 'female') {exit ('data error') } $this- > sex = $sex; / / $this indicates that the current object} public function get_sex () {echo "gender:". $this- > sex;}} $stu = new Student;echo $stu.name; / / qingyuecho $stu.sex; / / error private attribute that cannot be accessed outside the class. $stu2 = new Student;$stu2- > set_sex ('female'); $stu2- > get_sex (). The above is all the content of the article "how to use the PHP class access modifier". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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