generator.php

<?php
//Set default password values
$wordsErr = '';
$num_words = 4;
$link = '-';
$symbol = 'no';
$number = 'no';

//Server side validation
if (isset($_GET["submit"])) {
    if (ctype_digit($_GET["words"])) {
        $num_words = $_GET["words"];
    }
    else {
        $wordsErr = "You must enter a number";
    }
    if ($_GET['link'] != '') {
        $link = $_GET['link'];
    }
    if ($_GET['symbol'] == 'yes') {
        $symbol = $_GET['symbol'];
    }
    if ($_GET['number'] == 'yes') {
        $number = $_GET['number'];
    }
}

//Scrapes plain text from inside <li> tags
//Modified from http://stackoverflow.com/questions/14329892/web-scrape-using-preg-match-all
function get_words($url){
    $site = file_get_contents($url);
    $dom = new DOMDocument();
    @$dom->loadHTML($site);
    $result = array();
    foreach($dom->getElementsByTagName('li') as $li) {
        $innerHTML= '';
        $children = $li->childNodes;
        foreach ($children as $child) {
        $innerHTML .= trim($child->ownerDocument->saveXML($child));
        }
        $fixed = array_map('strip_tags', array_map('trim', explode("<br/>",trim($innerHTML))));  
        foreach($fixed as $val){
            if(empty($val)){continue;}
            $str = (string)$val;
            $result[] = str_replace(array('! '),'',$str);
        }
    }
    return $result;
}

//Scrape words from a dictionary site
//Site is saved so as not to leverage their resources
$array_words = [];
for ($x = 1; $x <= 10; $x++) {
    $z=$x*2;
    $y=$z-1;
    //Formats in accordance with URL pattern
    if ($y < 10)
        $y='0'.$y;
    if ($z < 10)
        $z='0'.$z;
    $url = 'dictionary/words-'.$y.'-'.$z.'-hundred.html';
    //Scrape the given URL's 
    $new_words = get_words($url);
    //Create an array or words
    $array_words = array_merge($array_words, $new_words);
}

//Generate 5 passwords and store in an array
$password_array = array();
for ($a = 0; $a < 5; $a++) {
    $password = '';
    //Select a random words
    for ($i = 0; $i <= $num_words; $i++) {
        $word_index = rand(0, count($array_words));
        $word = (string)$array_words[$word_index];
        $password = $password.$word.$link;
    }
    //Add number
    if ($number == 'yes') {
        $rand_int = (string)rand(0, 9);
        $password = $password.$rand_int;
    }
    //Add symbol
    if ($symbol == 'yes') {
        $chars = array(
            0 => '!',
            1 => '@',
            2 => '#',
            3 => '$',
            4 => '%',
            5 => '^',
            6 => '&',
            7 => '*',
            8 => '(',
            9 => ')',
            10 => '?'
        );
        $rand_int = rand(0, 10);
        $rand_char = $chars[$rand_int];
        $password = $password.$rand_char;
    }
    //Remove extra link if nor additional numbers or strings are added
    if ($symbol != 'yes' && $number != 'yes') {
        $password = substr($password, 0, -1);
    }
    //Remove spaces
    $password = preg_replace('/[\s]/','',$password);
    //Append password to password array
    array_push($password_array, $password);    
}