PHP crawler to collect comments on articles

I have code that parses through web pages finds commentaries and saves commentary info in DB. I have an array where all necessary pages are stored. I iterate through all these pages one by one and find HMTL element which contains all the info about commentary if there are multiple pages with commentaries I iterate through all of them. I also check each word spelling with dictionary and calculate correctness of the whole commentary. Then I save all the info + some additional info into my DB. I am using Simple HTML DOM parser.

The code is messy and quite slow and I would like to speed it up by optimizing it.

<?php
header('Content-Type: text/html; charset=Windows-1252');
header('Content-type: text/html; charset=utf-8');

include('connect.php');
set_time_limit(0);
include('simple_html_dom.php');

//array with links to pages
$array = array();

foreach ($array as $value){

$nextLink = $value;

// Parse each link
while ($nextLink) {

        //finds class with commentary info 
        $html=file_get_html($nextLink);
        $articles = $html->find('div [class=article-comment]');

            // iterate throught each commentary class
            foreach($articles as $article) {

                // finds commentary text     
                $content = $article->find('div[class=article-comment-content]',0)->innertext;

                // Dictionary
                $broker = enchant_broker_init();
                $tag = 'lv_LV';


                enchant_broker_set_dict_path($broker, ENCHANT_MYSPELL, 'C:\wamp\bin\php\php5.5.12');

                 //check spellnig of each word
                if (enchant_broker_dict_exists($broker, $tag)) {
                        $dict = enchant_broker_request_dict($broker, $tag);

                    //skip elements for check                                                                 
                        $trimmed_str = str_replace(['.', ',', '?', '!', ':', '"',')', '(', '*', '-', '–','','+','-','%',';',"'",'=','0','1','2','3','4','5','6','7','8','9','/'], ' ', $content);
                        $word_count = str_word_count($trimmed_str, 0, 'ēūīāšģķļžčņĒŪĪĀŠĢĶĻŽČŅ');
                        $word_array = preg_split('/\s+/', $trimmed_str);                                                 

                            //corect words count
                            $correct_words = 0;

                            //array for incorrect words
                            $incorrect_words = array();

                            //check words, if incorrect -> add to the array else add to count 1
                            foreach ($word_array as $word_value ){

                                $isCorrectlySpelled = enchant_dict_check($dict, $word_value);

                                    if ($isCorrectlySpelled !== true) {                              
                                    array_push($incorrect_words, $word_value);
                                } 

                                else {

                                    $correct_words +=1;
                                }
                            }

                            //incorrect words are stored in the array and separated with comma
                            $comma_separated = implode(",", $incorrect_words);

                            //calclate corectness of each word
                            $correctness = round(($correct_words/$word_count)*100,2);
                }
                enchant_broker_free($broker);


                // author of commentary
                $author = $article->find('strong[class=article-comment-author]',0)->innertext;       
                $date = $article->find('time[datetime]',0)->outertext;


                $str = $html->getElementById("someId")->outertext;
                $var = preg_split('/datetime=\"/', $date);
                $var1 = preg_split('/\"/',$var[1]);

                //likes and dislikes
                $voteUP = $article->find('a[class=article-comment-vote plus]',0)->innertext;
                $voteDown = $article->find('a[class=article-comment-vote minus]',0)->innertext;



                    //save info in DB
                    $sql = strip_tags("INSERT INTO commentstable(comment, author, date, VoteUP, VoteDown, word_count, correct_words, correctness, incorrect, articleID) VALUES ('$content', '$author', '$var1[0]', '$voteUP', '$voteDown','$word_count','$correct_words', '$correctness', '$comma_separated', '')"); 

                        if($sql) {                                               
                            if(mysqli_query($connection, $sql)){
                                echo "Records added successfully.";
                            } 
                            else{
                                echo "ERROR: Could not able to execute $insert. " . mysqli_error($link);
                            }
                        }
            }

            //If there are no more pages with comments
            $next_stop = $html->find('a[class=pageing-button-next disable]',0);

            if($next_stop){
                break;                           
            }

            // open next page
            $nextLink = ( ($temp = $html->find("a[class=pageing-button-next]", 0)) ? "http://somepage.com".$temp->href : NULL );

            // Clear DOM object
            $html->clear();         
            unset($html);
}
}