get specific data with file_get_contents()

Question

I want to get content from a site where i want to output some specific data. The data there looks like this:

<a itemprop="email">office@xy.com</a>

From this type of data i want to output only the email adress.

This is the Code:

<?php
$homepage = file_get_contents('https://www.xy.com/');
echo $homepage;
?>

Answer 1

You should use a parser. This will be more accurate than a regex, or string functions.

$dom = new domdocument();
$dom->loadhtml('<a itemprop="email">office@xy.com</a>');
$xpath = new DOMXPath($dom);
echo $xpath->query('//a[@itemprop="email"]')[0]->nodeValue;

https://3v4l.org/BU7Q4

You can read more here.

1. http://php.net/manual/en/class.domdocument.php
2. https://en.wikipedia.org/wiki/XPath

An alternative to using the xpath could be select all links then looking for the attribute.

$dom = new domdocument();
$dom->loadhtml('<a itemprop="email">office@xy.com</a>');
$links = $dom->getElementsByTagName('a');
foreach($links as $link) {
    if($link->getAttribute('itemprop') == 'email') {
        echo $link->nodeValue;
    }
}