The role of the var declaration in php

Source: Internet
Author: User
What is the role of var declaration in php? PHP has just learned, but even if the PHP Bible involves a wide range of teaching materials, it does not mention that PHP can use var to declare variables, but read a book class on the Internet, VAR is used to declare the variable. For example: classtest {& nbsp; var $ a; & nbsp; var $ B; & nbsp ;......} I tested it. it seems that var can only be used in the class. if it is used outside the class, an error occurs (what is the role of var declaration in PH php?
PHP has just learned, but even if the PHP Bible involves a wide range of teaching materials, it does not mention that PHP can use var to declare variables, but read a book class on the Internet, VAR is used to declare the variable. For example:

Class test {
Var $;
Var $ B;
......
}


I tested it. it seems that var can only be used in the class. if it is used outside the class, an error occurs (PHP5.3 ).

Which of the following functions can be summarized?

------ Solution --------------------
In PHP5, public is equivalent to var.
It is only for compatibility with PHP4, so var is retained
------ Solution --------------------
Forward compatibility

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.