turn HTML into a PHP array - php

Question

I have a string containing also HTML in a $html variable:
'Here is some text which I do not need to extract but then there are
<figure class="class-one">
<img src="/example.jpg" alt="example alt" class="some-image-class">
<figcaption>example caption</figcaption>
</figure>
And another one (and many more)
<figure class="class-one some-other-class">
<img src="/example2.jpg" alt="example2 alt">
</figure>'
I want to extract all <figure> elements and everything they contain including their attributes and other html-elements and put this in an array in PHP so I would get something like:
$figures = [
0 => [
"class" => "class-one",
"img" => [
"src" => "/example.jpg",
"alt" => "example alt",
"class" => "some-image-class"
],
"figcaption" => "example caption"
],
1 => [
"class" => "class-one some-other-class",
"img" => [
"src" => "/example2.jpg",
"alt" => "example2 alt",
"class" => null
],
"figcaption" => null
]];
So far I have tried:
$dom = new DOMDocument();
libxml_use_internal_errors(true);
$dom->loadHTML($html);
libxml_clear_errors();
$figures = array();
foreach ($figures as $figure) {
$figures['class'] = $figure->getAttribute('class');
// here I tried to create the whole array but I can't seem to get the values from the HTML
// also I'm not sure how to get all html-elements within <figure>
}
Here is a Demo.

Answer 1

Here is the code that should get you where you want to be. I have added comments where I felt they would be helpful:
<?php
$htmlString = 'Here is some text which I do not need to extract but then there are <figure class="class-one"><img src="/example.jpg" alt="example alt" class="some-image-class"><figcaption>example caption</figcaption></figure>And another one (and many more)<figure class="class-one some-other-class"><img src="/example2.jpg" alt="example2 alt"></figure>';
//Create a new DOM document
$dom = new DOMDocument;
//Parse the HTML.
#$dom->loadHTML($htmlString);
//Create new XP
$xp = new DOMXpath($dom);
//Create empty figures array that will hold all of our parsed HTML data
$figures = array();
//Get all <figure> elements
$figureElements = $xp->query('//figure');
//Create number variable to keep track of our $figures array index
$figureCount = 0;
//Loop through each <figure> element
foreach ($figureElements as $figureElement) {
$figures[$figureCount]["class"] = trim($figureElement->getAttribute('class'));
$figures[$figureCount]["img"]["src"] = $xp->query('//img', $figureElement)->item($figureCount)->getAttribute('src');
$figures[$figureCount]["img"]["alt"] = $xp->query('//img', $figureElement)->item($figureCount)->getAttribute('alt');
//Check that an img class exists, otherwise set the value to null. If we don't do this PHP will throw a NOTICE.
if (boolval($xp->evaluate('//img', $figureElement)->item($figureCount))) {
$figures[$figureCount]["img"]["class"] = $xp->query('//img', $figureElement)->item($figureCount)->getAttribute('class');
} else {
$figures[$figureCount]["img"]["class"] = null;
}
//Check that a <figcaption> element exists, otherwise set the value to null
if (boolval($xp->evaluate('//figcaption', $figureElement)->item($figureCount))) {
$figures[$figureCount]["figcaption"] = $xp->query('//figcaption', $figureElement)->item($figureCount)->nodeValue;
} else {
$figures[$figureCount]["figcaption"] = null;
}
//Increment our $figureCount so that we know we can create a new array index.
$figureCount++;
}
print_r($figures);
?>

Answer 2

$doc = new \DOMDocument();
$doc->loadHTML($html);
$figure = $doc->getElementsByTagName("figure"); // DOMNodeList Object
//Craete array to add all DOMElement value
$figures = array();
$i= 0;
foreach($figure as $item) { // DOMElement Object
$figures[$i]['class']= $item->getAttribute('class');
//DOMElement::getElementsByTagName— Returns html tag
$img = $item->getElementsByTagName('img')[0];
if($img){
//DOMElement::getAttribute — Returns value of attribute
$figures[$i]['img']['src'] = $img->getAttribute('src');
$figures[$i]['img']['alt'] = $img->getAttribute('alt');
$figures[$i]['img']['class'] = $img->getAttribute('class');
}
//textContent - use to get the text of tag
if($item->getElementsByTagName('figcaption')[0]){
$figures[$i]['figcaption'] = $item->getElementsByTagName('figcaption')[0]->textContent;
}
$i++;
}
echo "<pre>";
print_r($figures);
echo "</pre>";