Getting value from HTML object in PHP

Question

I have an html object:

<a href="https://website/" class="td-post-category" value="News" >News</a>

Which I get from typing $this->get_category(); in PHP.

My question here is if it is possible to get the value-field(News) from the HTML-object inside of PHP. Something like $this->get_category().value or $this->get_category()->value. Like we could in Javascript.

Or if you know how to "extract" variables from functions. Like if I had a variable named $selected_category_obj_name in the function get_category(), how to get this value when I have written $this->get_category(), how can I get the variable $selected_category_obj_name?

I am new to PHP, so some guiding would be very appreciated.

@Adam can it be Wordpress? Doesn't get_category() return an array or an object? — ishegg
– ishegg, Commented Feb 16, 2018 at 14:56
HTML doesn't have objects, it does have <object>, The attribute value is invalid for <a>. Looks like you're also new to HTML. — Ron van der Heijden
– Ron van der Heijden, Commented Feb 16, 2018 at 14:57
@ishegg - Not entirely sure without referring to the WordPress Codex, but if it is WP, it'll make debugging this weird use case a bit easier possibily. — Adam
– Adam, Commented Feb 16, 2018 at 14:58

ishegg · Accepted Answer · 2018-02-16 14:52:29Z

1

You can use a regular expression with preg_match():

$html = '<a href="https://website/" class="td-post-category" value="News" >News</a>';
preg_match("/value=\"(.+)\"/i", $html, $matches);
var_dump($matches[1]); // News

The pattern simply looks for anything more than once in between value=" and ", returning the results into the $matches array..

Or DOMDocument and traverse the DOM to get to the attribute of the element:

$html = '<a href="https://website/" class="td-post-category" value="News" >News</a>';
$doc = new DOMDocument;
$doc->loadHTML($html);
var_dump($doc->getElementsByTagName("a")->item(0)->getAttribute("value")); // News

Demos

answered Feb 16, 2018 at 14:52

ishegg

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