member function error in data extraction - php

Question

I am trying get data from a external source but i can't get the data and i am facing this error.
Notice: Trying to get property of non-object in E:\xampp\htdocs\test\merit-list.php on line 38
Fatal error: Call to a member function find() on null in E:\xampp\htdocs\test\merit-list.php on line 39
Here is my code
<?php
require('resources/inc/simple_html_dom.php');
$linksrc = 'http://58.65.172.36/Portal/WebSiteUpdates/Achievements.aspx';
$curl = curl_init();
curl_setopt_array($curl, array(
CURLOPT_URL => $linksrc,
CURLOPT_RETURNTRANSFER => 1,
CURLOPT_FOLLOWLOCATION => 1,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 3000,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_USERAGENT => 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36',
));
$file = curl_exec($curl);
$error = curl_error($curl);
curl_close($curl);
$dom = new simple_html_dom();
$dom->load($file);
$doctorDivs = $dom->find("table#Farooq", 0)->children();
$doctors = array();
foreach($doctorDivs as $div){
$doctor = array();
// line 38
$image = $doctor["image"] = $div->find('img', 0)->src;
$details = $div->find('tr', 0)->find("td");
$name = $doctor["name"] = trim($details[1]->plaintext);
$spec = $doctor["desc"] = trim($details[2]->plaintext);
$doctors[] = $doctor;
echo $image;
echo $name;
echo $spec;
}
?>

Answer 1

The problem is that the first row of the table doesn't have an <img>, because it's the row of headings, so $div->find("img", 0) returns null. You get the first error when you try to access null->src.
The second error is because $div is the <tr> element. $div->find("tr") searches the children of $div, it doesn't include $div itself, so it always returns null. Also, this code won't work in the heading row, either, because it contains <th> rather than <tr> elements.
You could just skip over the heading row by putting:
array_shift($doctorDivs);
before the foreach loop. This will remove the first element of the array.
And change $details to :
$details = $div->find("td");