Echo nothing?

PHP
1

Hi,
I have created a class “friendClass” and tried to echo it. It prints nothing without any errors, not sure what was it going on? Any helps would be appreciated!

class friendClass{
	
		//attributes - variable
		public $name;
		public $sex;
		public $title;
		public $country;
		
		//methods - function
		public function eat(){}
		public function watch(){}
		public function drive(){}
		public function speak(){}	
		
	}
	
	$friend1 = new friendClass;
	$friend2 = new friendClass;
	$friend3 = new friendClass;
	$friend4 = new friendClass;
	
	$friend1 -> name = "Bach";
	$friend1 -> title = "Muscian";
	$friend1 -> sex = "Male";
	$friend1 -> country = "Germany";
	
	$friend1 -> eat("Bread");
	$friend1 -> speak("German");
	$friend1 -> drive("Horse");
	$friend1 -> watch("Beethoven");
	
	echo "Name is: ".$friend1->name;
2

Try testing your class in small steps.

This testing code works fine.

<?php

class friendClass {

    //attributes - variable
    public $name;
    public $sex;
    public $title;
    public $country;

    //methods - function
    public function eat() {
    }

    public function watch() {
    }

    public function drive() {
    }

    public function speak() {
    }

}

$friend1 = new friendClass;
$friend1->name = "Bach";

echo "Name is: " . $friend1->name;

?>
3

I have followed your instruction. It is still showing nothing.

4

your problem comes that the last command you gave php was to make $friend4 the object for the friend class so if you switch $friend1 with $friends4 should work perfectly. objects have a 1 & 1 relationship so lets say you have 1 and 2 and a class FOO. So if we make 1 an the object of the FOO class 1 = new FOO;. 1 and FOO have a 1 & 1 relationship only 1 can use the FOO class. Now if we make 2 the object of the FOO class 2 = new FOO; 1 loses it’s relationship to FOO because your last command to php was make 2 the 1 & 1 relationship. sorry for the crummy explanation but i hope you understand the why

5

The code I posted works without any problems on my local server.

6

If I understand you correctly, the red bit is not correct because you can make as many instances (copies) of a class as you like and each instance will have its own copy of the class stored in memory.

For example:

Say you have a class called myCar.

then it is correct to do the following:

car1 = new myCar();

car2 = new myCar();

Both car1 and car2 will have their own copies of the myCar class in memory. You can change the properties of say car1 without affecting the same property in car2.

7

Thanks so much sir.