Looping through array of objects PHP

Question

How can I loop through a PHP array of objects (the objects are books with title and price) and output the one whose title comes after the letter R alphabetically? Thanks

Should I create an array with alphabetic letters then merge that array with book's array (in this case bookInformation)?

class Book {

    public $title;
    public $price;

    public function __construct($title, $price) {
        $this->title = $title;
        $this->price = $price;
    }
       public function info() {
        echo $this->title . ' is ' . $this->price . '<br>';  

    } 
}

$bookOne = new Book("Mall", 13.95);
$bookTwo = new Book("Will", 23.99);

$bookOne->info();
$bookTwo->info();

$bookInformation = [$bookOne, $bookTwo];

Nick · Accepted Answer · 2019-08-24 04:19:38Z

1

You can use array_filter to find all the books whose title comes after R, then sort that list by title using usort and then printing the first element in the sorted list:

$fBooks = array_filter($bookInformation, function ($v) { return substr($v->title, 0, 1) > 'R'; });
if (count($fBooks)) {
    usort($fBooks, function ($a, $b) { return strcmp($a->title, $b->title); });
    print_r($fBooks[0]);
}
else {
    echo "no book found!";
}

Demo on 3v4l.org

answered Aug 24, 2019 at 4:19

Nick

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Comments

Nick · Accepted Answer · 2019-08-24 05:10:40Z

0

Use array_column Function

$Arraya = [ 'ObjA' => { 'title' => "booka", 'page' => 27, }, 'Objb' => { 'title' => "bookb", 'page' => 37, }, ];
$ArrayofArray = json_decode(json_encode($Arraya), 1);
$titles = array_column($ArrayofArray, "title");

Here $title return array of title

edited Aug 24, 2019 at 5:10

Nick

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answered Aug 24, 2019 at 4:54

Akshay Kungiri

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1 Comment

Nick Over a year ago

You can use array_column directly on an array of objects. 3v4l.org/3ZXGA

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