PHP public function behaves like static

Question

I read a book about PHP when I came across some weird piece of code:

 class Employee {
        public function show() {
            echo "show launched\n";
        }
    }

    Employee::show();

I came from C ++, so I was going to bet that this code would not work. That is why I tested it.

And it worked, showing "show running" (omg, am I drinking?)!

It seems to violate the concept that a class method can be called without instantiating the class.

• What is the meaning of a static identifier in classes?
• Are all public functions static too? Really, what am I missing?

Thanks in advance.

---

Addition: Just a notice.

I found that in this book . Pages 178-179 and are given as a correct example (if I'm right)

Answer 1

, , . , error reporting PHP...

: Employee:: show()

static .

..

<?php
class Employee {
    public static function show() { //<----- Added the static keyword.
        echo "show launched\n";
    }
}

Employee::show();

---

...

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PHP..

E_STRICT .

Source

Answer 2

, php. PHP 4 ( ), ::. PHP 5 .

PHP 5 - . , PHP 5.1.3, :

Strict Standards:  Non-static method Employee::show() should not be called statically in ...

Answer 3

, php. php .

, php.

PHP 5.5.9-1 + sury.org ~ exact + 1 (cli) (: 13 2014 15:53:53)

, .

<?php 
ini_set('display_errors', 1);
error_reporting(E_ALL);

 class Employee {
        public function show() {
            echo "show launched\n";
        }
    }

    Employee::show();

?>

, .

**Strict Standards: Non-static method Employee::show() should not be called statically in /var/www/test/index.php on line 19
show launched**

Answer 4

Code Works

Strict standards: the non-static Employee :: show () method should not be called static

Just add the static keyword to the function like public static function show()