PHP DOM html get element from another element - php

Question

I am trying to create something for php html dom to work with a element path pattern.
It looks as fallow. I can have different paths where I want to have some text out. like;
$elements = 'h1;span;';
$elements = 'div.test;h2;span';
I tried to create an function to handle these inserts but I am stuck on the
part to set 'getElementsByTagName()' in the good order and to receive the value of
the last element,
what I have done now;
function convertName($html, $elements) {
$elements = explode(';', $elements);
$dom = new DOMDocument;
$dom->loadHTML($html);
$name = null;
foreach ($elements as $element) :
$name. = getElementsByTagName($element)->item(0)->;
endforeach;
$test = $dom->$name.'nodeValue';
print_r($test); // receive value
}
I hope someone can give me some input or examples.

Answer 1

May be something like this:
function convertName($html, $elements) {
$doc = new DOMDocument();
libxml_use_internal_errors(true);
$doc->loadHTML($html); // loads your html
$xpath = new DOMXPath($doc);
$elements = explode(';', $elements);
$elemValues = array();
foreach ($elements as $element) {
$nodelist = $xpath->query("//$element");
for($i=0; $i < $nodelist->length; $i++)
$elemValues[$element][] = $nodelist->item($i)->nodeValue;
}
return $elemValues;
}
// TESTING
$html = <<< EOF
<span class="bar">Some normal Text</span>
<input type="hidden" name="hf" value="123">
<h1>Heading 1<span> span inside h1</span></h1>
<div class='foo'>Some DIV</div>
<span class="bold">Bold Text</span>
<p/>
EOF;
$elements = 'h1;span;';
// replace all but last ; with / to get valid XPATH
$elements = preg_replace('#;(?=[^;]*;)#', '/', $elements);
// call our function
$elemValues = convertName($html, $elements);
print_r($elemValues);
OUTPUT:
Array
(
[h1/span] => Array
(
[0] => span inside h1
)
)