Dm. Sytnic sytnic

## 9.1. lambda.php
<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Demo</title>
</head>

<body>
    <?php
        $books = [

## validate_brackets.php
<?php

class Valid {
    public $str;
    public $check;

    function __construct($str) {
        $this->check = $this->valid_bracket($str);
    }
	<!doctype html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<title>Demo</title>
	</head>

	<body>
	<?php
	$books = [
	<?php

	class Valid {
	public $str;
	public $check;

	function __construct($str) {
	$this->check = $this->valid_bracket($str);
	}