Getting elements of a div from another page (PHP)

So I have page one:

<div id="div1">This is text one</div>

<div id="div2">This is text two</div>

<div id="div3">T开发者_如何学Chis is text three</div>

Now I want to get the elements of div one, that it will return This is text one, how can I do that?

You can use DOMDocument in PHP:

<?php

$doc = new DomDocument;

// We need to validate our document before refering to the id
$doc->validateOnParse = true;
$doc->loadHtml(file_get_contents('http://google.com/bla.php'));

var_dump($doc->getElementById('div1'));

?>

$string = file_get_contents($url);
if (preg_match('/<div id="div1">([^<]*)<\/div>/', $string, $matches) > 0) {
    echo $matches[1]; //This is text one
}