PHP objects and arrays - php

Question

Hi I am new to PHP and I need to create an array and add both books to the array and than loop through the array this is where I am having trouble
if the price of a book is less than $20.00 output the book’s name and price
if the book’s title comes after the letter R in the alphabet output the book’s title.
My code so far is:
<?php
class Book {
// Properties
public $price;
public $title;
// Methods
function set_price($price) {
$this->price = $price;
}
function get_price() {
return $this->price;
}
function set_title($title) {
$this->title = $title;
}
function get_title() {
return $this->title;
}
}
$first_book = new Book();
$first_book->set_price('$13.95');
$first_book->set_title('Moby Dick');
echo "Price: " . $first_book->get_price();
echo "<br>";
echo "Title: " . $first_book->get_title();
echo "<br>";
$second_book = new Book();
$second_book->set_price('$23.99');
$second_book->set_title('Wuthering Heights');
echo "Price: " . $second_book->get_price();
echo "<br>";
echo "Title: " . $second_book->get_title();
echo "<br>";
$book = array("Moby Dick", "Wuthering Heights");
echo "Book Titles: " . $book[0] . ", " . " and " . $book[1] . ".";
?>
Kind Regurds
Kelly

Answer 1

Seems like you got most of it already, for the rest I would add a function to your Book class to get the first character of the title, and then use the ord (PHP documentation here) to convert it to an integer so you can check if it comes after the letter R.
<?php
// Add this to your Book class to get the first character of the title so we can check
// if the book comes after the letter 'R'
public function get_first_char() {
$titleArray = str_split($this->title);
return reset($titleArray);
}
// Instantiate your books and set properties ...
// Loop over each book
foreach ($book as $bookItem) {
$price = $bookItem->price;
// Right now $price is a string ('$xx.xx'), we need it to be numeric
$price = (float) substr($price, 1);
if ($price < 20) {
echo $bookItem->title;
echo $bookItem->price;
}
// Use the ord function to convert the ascii character into an int
if (ord(strtoupper($bookItem->get_first_char())) > ord('R')) {
echo $bookItem->title;
}
}
?>