PHP: Get Values of all <options> Tag to an array

Question

First of all: Sorry, I´m just learning coding, so this might be an easy question :).

What I want to archive is getting the values of all

<option value="123"></option>
<option value="412"></option> 

in an html document into an array. So for the above example only the "123" "412" etc. The arrays then will get checked if they are only numbers.

This is what i got:

$html = file_get_contents(url);
preg_match_all('/value="(\w+)"/', $html, $result);
var_dump($result);
$digits = array_filter($result, 'ctype_digit');

What I get from this is nothing, because the $result gives me results like:

value="123"

I do know that I messed up with those regular expressions, but I cant´t get ir right.

And then I´m not sure whether it is better to use XPath to select it, but I did not get that either :(.

Any help is highly appreciated! :)

Answer 1

Thanks to the hint by CD001 and Kisaragi I manged it. It´s pretty simple with the DOMDocument thing...sometimes one just thinks too complicated... .

$html = file_get_contents('url');
$dom = new DOMDocument;
$dom->loadHTML($html);
$options = $dom->getElementsByTagName('option');
$digits = array();
foreach ($options as $option) {
    $valueID = $option->getAttribute('value');
    array_push($digits, $valueID);
}
var_dump($digits);

Answer 2

My advice would be to not use a regex but a domparser.

For your provided data, the $result is an array which contains 2 arrays. Your values are in the second array $result[1]

You could update your code to:

preg_match_all('/value="(\w+)/', $html, $result);
$digits = array_filter($result[1], 'ctype_digit');
var_dump($digits);

That would give you:

array(2) {
  [0]=>
  string(3) "123"
  [1]=>
  string(3) "412"
}

Php demo output

An alternative regex:

value="\\K\\d+(?=") which would match one or more digits d+

Php demo output