Setting the value of properties in PHP - php

Question

I have a class called members, i have an example below. What i am asking is how do i set the values of title. So for example , i only allow Mr, Mrs, Miss and any other values will throw out an error stating Only Mr,Mrs,Miss is allowed , Firstname must be John..
class Member
{
private $title;
private $firstname;
public function __construct( $title )
{
$this->title = $title;
}
public function showProfile()
{
echo "<dl>";
echo "<dt>Title:</dt><dd>$this->title</dd>";
echo "</dl>";
}
}
$data = new Member( "Mrr" );
$data->showProfile();

Answer 1

You can try this , hope this will be helpful.
Try this code snippet here
<?php
ini_set("display_errors", 1);
class Member
{
private $title;
public function __construct($title)
{
if(!in_array($title, ["Mr","Mrs","Miss"]))
{
throw new Exception("Only Mr,Mrs,Miss are allowed!");
//or you can simple echo out your message instead of exception
}
$this->title = $title;
}
public function showProfile()
{
echo "<dl>";
echo "<dt>Title:</dt><dd>$this->title</dd>";
echo "</dl>";
}
}
$data = new Member("Mrr");
Optionally you can set a variable for this error with in the class, which prevent further execution of methods of class script. You can also do it like this
Solution 2:
Try this code snippet here
<?php
ini_set("display_errors", 1);
class Member
{
private $title;
private $error=false;
public function __construct($title)
{
if(!in_array($title, ["Mr","Mrs","Miss"]))
{
$this->error=true;
}
$this->title = $title;
}
public function showProfile()
{
if($this->error!==true)
{
echo "<dl>";
echo "<dt>Title:</dt><dd>$this->title</dd>";
echo "</dl>";
}
else
{
echo "Only Mr,Mrs,Miss is allowed!";
}
}
}
$data = new Member("Mrr");
$data->showProfile();

Answer 2

Make a setter
function setTitle($newTitle){
if(in_array($newTitle, array('Mr', 'Miss', 'Mrs' ))
$this->title=$newTitle;
else
echo 'ERROR';
}
And then call it from the constructor

Answer 3

I didnt like any of the answers.
Here's mine. I think you should use a mutator in your solution. The member class should be decoupled from the setter.
class Member
{
private $title;
public function setTitle($title)
{
$this->title = $title;
}
public function showProfile()
{
return sprintf("<dl><dt>Title</dt><dt><dd>%s</dd></dt></dl>" , $this->title );
}
}
class TitleProperty
{
protected $name = 'title';
protected $allowed_allowed = ['mr', 'mrs', 'miss'];
public $errors = [];
/**
*#param Member $member
*#param string $value
*/
public function __construct( Member $member, $value )
{
if(!in_array($value, $this->allowed_allowed )){
$this->errors[] = "Only Mr,Mrs,Miss is allowed";
}
else{
$member->setTitle( $value );
}
}
}
$member = new Member();
$property = new TitleProperty($member, 'hello');
if($property->errors){
print_r($property->errors);
}
else{
echo 'title set.';
}
There you go