Voodoo\CanOfSpam, a PHP 5.4 implementation to parse and get random spam text for blog comments

Voodoo\CanOfSpam.php

<?php
/**
 * CanOfSpam, a PHP 5.4 implementation to parse and get random spam text for blog comments
 * -> https://gist.github.com/shanselman/5422230
 * 
 * License: MIT
 * Author : Mardix - http://github.com/mardix
 *
 * How to use
 *
 * $contents = file_get_contents("path/to/file.txt");
 * $canOfSpam = new Voodoo\CanOfSpam($contents);
 * $randomSpam = $canOfSpam->getRandom();
 *
 */

namespace Voodoo;

class CanOfSpam {

    private $randomTextPattern = "/{(.*?)}/";

    private $spams = [];

    private $totalSpams = 0;

    /**
     * Constructor
     * @param string $contents
     */
    public function __construct($contents)
    {
        $this->spams = explode("|\n", $contents);
        $this->totalSpams = count($this->spams);
    }

    /**
     * Return a random spam
     *
     * @return string
     */
    public function getRandom()
    {
        return preg_replace_callback($this->randomTextPattern,
                        function($match) {
                            $matched = explode("|", $match[1]);
                            return $matched[array_rand($matched, 1)]." ";
                        },
                        $this->spams[rand(0, $this->totalSpams)]
                );
    }
}