How to Parse HTML in PHP without Regular Expressions?

PHP Parse HTML Code (without Regular Expressions)

You have a PHP variable containing HTML code and you need to extract the text between the headings without using regular expressions.

Solution 1: PHP Document Object Model (DOM)

This approach involves using the PHP Document Object Model (DOM) to parse the HTML:

<?php
$str = '<h1T1</h1>Lorem ipsum.<h1T2</h1>The quick red fox...<h1T3</h1>... jumps over the lazy brown FROG';
$DOM = new DOMDocument;
$DOM->loadHTML($str);

// Get all H1 elements
$items = $DOM->getElementsByTagName('h1');

// Display the text of each H1 element
for ($i = 0; $i < $items->length; $i++) {
    echo $items->item($i)->nodeValue . "<br/>";
}
?>

This will output the text within the headings:

T1
T2
T3

Solution 2: Regex Replacement (for Content Between Headings)

If the goal is to extract the content between the headings, you can use regular expressions as follows:

<?php
$str = '<h1T1</h1>Lorem ipsum.<h1T2</h1>The quick red fox...<h1T3</h1>... jumps over the lazy brown FROG';
$result = preg_replace("#<h1>.*?</h1>.*?</h1>#", "", $str);

echo $result;
?>

This will output the content between the headings:

Lorem ipsum.The quick red fox...... jumps over the lazy brown FROG

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