LIMITING extracted rows from Web Crawler

Question

So, i have this awesome web crawler code. it gets requested data from the mentioned site and pastes along with link associated with it. (Good Boy)

Now the problem is, how to limit the extracted data to say 5 rows. I tried putting "LIMIT 5" (which we usually do in php sql queries) but it didn't work..

My code goes as follows::

<div class="news-entry">
            <div class="newsblock">
                <div style="clear:both"></div>
                    <h2>
                       <a rel="nofollow" target="_blank" href="http://www.usmle-forums.com/usmle-step-3-forum/">
                            USMLE-Forums :: STEP-3         
                       </a>
                    </h2>
                <ul>
                    <?php
                        function get_datafour($url) {
                        $ch = curl_init();
                        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
                        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
                        curl_setopt($ch, CURLOPT_URL,$url);
                        $result=curl_exec($ch);
                        curl_close($ch);
                        return $result;
                        }
                        $returned_content = get_datafour('http://www.usmle-forums.com/usmle-step-3-forum/');
                        $first_step = explode( '<tbody id="threadbits_forum_30">' , $returned_content );
                        $second_step = explode('</tbody>', $first_step[1]);
                        $third_step = explode('<tr>', $second_step[0]);
                        // print_r($third_step);
                        foreach ($third_step as $element) {
                        $child_first = explode( '<td class="alt1"' , $element );
                        $child_second = explode( '</td>' , $child_first[1] );
                        $child_third = explode( '<a href=' , $child_second[0] );
                        $child_fourth = explode( '</a>' , $child_third[1] );
                        $final = "<a href=".$child_fourth[0]."</a></br>";
                    ?>
                    <li target="_blank" class="itemtitle">
                        <span class="item_new"></span><?php echo $final?>
                    </li>
                    <?php
                        }
                    ?>      
                </ul>        
                <div style="clear:both"></div>
            </div>
        </div>

Any Suggestions are Appreciated..

break in foreach loop after 5 iterations – M A SIDDIQUI Feb 10 '17 at 05:21 — M A SIDDIQUI, Feb 10 '17 at 05:21
see the answer by Manvir singh – M A SIDDIQUI Feb 10 '17 at 05:35 — M A SIDDIQUI, Feb 10 '17 at 05:35

Manvir Singh · Accepted Answer · 2017-02-10T06:15:36.537

1

Break Foreach loop after 5th result

foreach ($third_step as $key=>$element) {
    //Your Logic Here
    if($key==4){
       break;
    }
}

we are using $key==4 because index starts from 0 hope you got it

edited Feb 10 '17 at 06:15

answered Feb 10 '17 at 05:31

Manvir Singh

431
4
6

dude, whats login content here? – harishk Feb 10 '17 at 05:40
login content . ? – Manvir Singh Feb 10 '17 at 05:42
@Mahavir Sing And in the other context , can you tell me how to know the array index of a html element by just looking at the script? – harishk Feb 10 '17 at 06:00
@harishk sorry! i mean logic i correct there html element by index ? i didn't get it will you please explain ? – Manvir Singh Feb 10 '17 at 06:16
like can you please check my question here... http://stackoverflow.com/questions/42137646/array-index-of-elements-from-a-site-code – harishk Feb 10 '17 at 06:21

LIMITING extracted rows from Web Crawler

1 Answers1