How to write this into php code? Alt of the Image - php

Question

How to write this into code please?
if the alt of the image is "your alt here" then its 1.
Here is the code that i made.
public function getSiteAdvisor($domain)
{
try
{
$callback_url = "https://www.mcafee.com/threat-intelligence/site/default.aspx?url=" . $domain;
$curl_response = $this->curl->get($callback_url);
if ($curl_response->headers['Status-Code'] == "200") {
libxml_use_internal_errors(TRUE);
$this->dom_doc->loadHTML($curl_response);
libxml_use_internal_errors(FALSE);
$xpath = new DOMXPath($this->dom_doc);
$tmp = $xpath->query('/html/body//div[#class="threeFourth"]//img/#alt')->item(0);
I don't know how to code the 'alt' of the image.
I add some code but not sure if this is correct.
if ($tmp->hasAttribute('src')) {
$tmp = $tmp->getAttribute('src');
if (stripos($tmp, "Minimal") !== false) {
$siteadvisor_rating = 1;
} elseif (stripos($tmp, "Moderate") !== false) {
$siteadvisor_rating = 2;
} elseif (stripos($tmp, "High") !== false) {
$siteadvisor_rating = 3;
} else {
$siteadvisor_rating = 0;
}
} else {
$siteadvisor_rating = 0;
}
} else {
$siteadvisor_rating = 0;
}
$response = array(
'status' => 'success',
'data' => array(
'siteadvisor' => (int)$siteadvisor_rating
)
);
}
catch (Exception $e)
{
$response = array(
'status' => 'error',
'msg' => $e->getMessage()
);
}
return $response;
}
Thanks

Answer 1

I found an answer by using this:
if ($tmp->hasAttribute('src')) {
$tmp = $tmp->getAttribute('alt');
if (stripos($tmp, "Minimal") !== false) {
$siteadvisor_rating = 1;
} elseif (stripos($tmp, "Moderate") !== false) {
$siteadvisor_rating = 2;
} elseif (stripos($tmp, "High") !== false) {
$siteadvisor_rating = 3;
} else {
$siteadvisor_rating = 0;
}
} else {
$siteadvisor_rating = 0;
}
} else {
$siteadvisor_rating = 0;