PHP search for website with specific words - php

Question

I'm trying to monitor a new products page of a website with specific words. I already have a basic script that searches for a single word using file_get_contents(); however this is not effective.
Looking at the code they are in <td> tags within a <table>
How do I get PHP to search for the words no matter what order and get declaration they are in? e.g.
$searchTerm = "Orange Boots";
from:
<table>
<td>Boots (RED)</td>
</table>
<table>
<td>boots (ORANGE)</td>
</table>
<table>
<td>Shirt (GREEN)</td>
</table>
Returns a match.
Sorry if its not clear, but I hope you understand

Answer 1

you can do this like
$newcontent= (str_replace( 'Boots', '<span class="Red">Boots</span>',$cont));
and just write css for class red like you want to show the red color than color:red; and do same thing for rest
but the better approach will be DOM and Xpath

Answer 2

If you're looking to make a quick and dirty search over that HTML block, you can try a simple regular expression with the preg_match_all() function. For example, you can try:
$html_block = get_file_contents(...);
$matches_found = preg_match_all('/(orange|boots|shirt)/i', $html_block, $matches);
$matches_found would be either 1 or 0, as an indication if a match was found or not. $matches would be populated with any matches in accordance.

Answer 3

Use curl. It's much faster than filegetcontents(). Here's a starting point:
$target_url="http://www.w3schools.com/htmldom/dom_nodes.asp";
// make the cURL request to $target_url
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$target_url);
curl_setopt($ch, CURLOPT_FAILONERROR, true);
curl_setopt($ch, CURLOPT_AUTOREFERER, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,true);
curl_setopt($ch, CURLOPT_TIMEOUT, 10);
$html= curl_exec($ch);
if (!$html) {exit;}
$dom = new DOMDocument();
#$dom->loadHTML($html);
$query = "(/html/body//tr)"; //this is where the search takes place
$xpath = new DOMXPath($dom);
$result = $xpath->query($query);
for ($i = 0; $i <$result->length; $i++) {
$node = $result->item(0);
echo "{$node->nodeName} - {$node->nodeValue}<br />";
}