What’s the difference between var $var and public $var?

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4

I have a class:

class anyClass{
   public $var1;
   var $var2;
}

The difference between $var1 and $var2?

php classes

3 answers

6


public $var1 is a public member of the class access modifiers were added in php5.

Already var $var2 is a way to declare an attribute of a legacy class of php4 and should not be used in new projects, it still works in php5 but its visibility is public.

Manual - visibility

  • Ah ta.. ta in the documentation.. Today I am looking for.. I passed my eye very quickly and did not find in Visibility talking about var. I’ll give you some more research.

  • Interesting is that the documentation warns that, from version 5.1.3, use var would cause the invocation of a E_STRICT. However, in all the tests I performed, this did not happen. @_@ ???

  • 1

    @Wallacemaxters, this happens in versions 5.x up to 5.1.3, after this not generated any Warning, it is something like the E_ALL and the E_STRICT(inserted in php5.3), has another function that I do not remember that only generates Warning in php5.1 ... vc can test different versions here only php5.0.4 is offline.

  • @Wallacemaxters, this is question about the function you talked about, is_a.

  • 1

    I found that it is not possible to use var Static. It would cause a Parse error: syntax error, unexpected 'static' (T_STATIC), expecting variable (T_VARIABLE)..

  • It is because in the case of a variable static, you can "omit" the visibilitade. Example static $x = 1, without the var

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0

It was a way to declare an attribute with public. It is out of use since PHP version 5.

Public attribute statement example using PHP version 4 or below (prefix var).

<?php
    classe Caneta {
        var $modelo;
        var $cor; 
    }

Currently, to declare an attribute as public, you must use the prefix public instead of var, see what the same example would look like with PHP 5 or higher:

<?php
    classe Caneta {
        public $modelo;
        public $cor; 
    }

0

The variable declared as var $var2; is being discontinued since the php4 version. From php5, it was possible to modify the access of class attributes and methods to enable a more performatic range of objects, through inheritances, access restrictions, polymorphism, among other good practices in the use of PHP language.

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