PHP从网站获取某些信息但来自所有页面

Question

I want to extract a href attribute but this attributes especially has mailto function. and i want to do this not just for one link but all links belongs to main webpage.

I tried this:

<?php

$url = "https://www.omurcanozcan.com";

$html = file_get_contents( $url);

libxml_use_internal_errors( true);
$doc = new DOMDocument;
$doc->loadHTML( $html);
$xpath = new DOMXpath( $doc);
$node = $xpath->query( "//a[@href='mailto:']")->item(0);


echo $node->textContent; // This will print **GET THIS TEXT**

 ?>

I expect for instance a code is

<a href='mailto:[e-mail]'>[e-mail]</a>

I want to echo

<p>[e-mail]</p>

Answer 1

The main problem is that in your XPath, you are checking for

//a[@href='mailto:']

This will looks for a href attribute which only contains mailto:, what you want is where the href starts with mailto:, you can do this using starts-with()...

$node = $xpath->query( "//a[starts-with(@href,'mailto:')]")->item(0);

The second thing is that I don't think your page is fully loaded when you get the content, a common test I do is to save the HTML once I've loaded it so I can check it out first...

$url = "https://www.omurcanozcan.com";

$html = file_get_contents( $url);
file_put_contents("a.html", $html);

If you then look in a.html you can see the HTML it is using, in the content I cannot see any mailto: links.