Need help assigning a value to a property

[eldan88]

Hey,

 

 I am little bit new to OOP, and I have some difficulties assigning a string to a property through a method, and then calling the property through the method. Below is an example of what I am trying to accomplish, and when I do call the method nothing echo's out.

class test1 {

public $last_name;

public function name() {
	$this->$last_name="scott";
	return $this->last_name;
}
	
}

$name = new test1();
echo $name->name();

[Zane]

What version of PHP are you using?  I don't see why the above wouldn't echo anything, other than version issues

[eldan88]

What version of PHP are you using?  I don't see why the above wouldn't echo anything, other than version issues

 

 

Version 5.3.1. Its giving me a Fatal error: Cannot access empty property message.

[Zane]

Cannot access empty property message.

According to the code you provided, that error is completely true.  You did not provide the code that made the error, that is key to getting the best answer.

[Strider64]

<?php

// Using traditional setters and getters:
class User {

  private $username = NULL;
  
  public function getUsername() {
	  return $this->username;
  }
  
  public function setUsername($username) {
        $this->username = $username;
  }
    	
}

$data = new User();

$data->setUsername('Justin Verlander');

echo $data->getUsername();

This uses traditional setters and getters method, but what really neat is that you don't need to use them when pulling from mysql

, for you can do something like this:

    // Check against the database:
    $query = 'SELECT id, userType, username, email, pass, fullName, address, city, state, zipCode FROM users WHERE username=:username';
    $stmt = $pdo->prepare($query);
    $stmt->execute(array(':username' => $_POST['username']));
	 
    
    $stmt->setFetchMode(PDO::FETCH_CLASS, 'User');
	$stored_user_data = $stmt->fetch();

You just have to make sure that the names in the database corresponds to what in the class:

 

For example public username=Null; must have a matching table column username. I also try to keep name my classes that corresponds in what I doing.

[kicken]

 

	$this->$last_name="scott";

 

That should just be $this->last_name="scott"; You don't use the $ before property names.

[eldan88]

<?php

// Using traditional setters and getters:
class User {

  private $username = NULL;
  
  public function getUsername() {
	  return $this->username;
  }
  
  public function setUsername($username) {
        $this->username = $username;
  }
    	
}

$data = new User();

$data->setUsername('Justin Verlander');

echo $data->getUsername();

This uses traditional setters and getters method, but what really neat is that you don't need to use them when pulling from mysql

, for you can do something like this:

    // Check against the database:
    $query = 'SELECT id, userType, username, email, pass, fullName, address, city, state, zipCode FROM users WHERE username=:username';
    $stmt = $pdo->prepare($query);
    $stmt->execute(array(':username' => $_POST['username']));
	 
    
    $stmt->setFetchMode(PDO::FETCH_CLASS, 'User');
	$stored_user_data = $stmt->fetch();

You just have to make sure that the names in the database corresponds to what in the class:

 

For example public username=Null; must have a matching table column username. I also try to keep name my classes that corresponds in what I doing.

 

Thanks a lot. I read through it and it makes a lot of sense. =)