How to Extract Text Between Tags in PHP Without Using Regular Expressions?

How to Parse HTML Code in PHP

Problem:
Extract the text between heading tags (

) from HTML code stored in a PHP variable.

Requirements:
Avoid using regular expressions.

Solution:

There are several techniques to parse HTML code in PHP. The recommended method for non-regular expressions is to use the PHP Document Object Model (DOM).

<?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);

// Retrieve all heading elements
$items = $DOM->getElementsByTagName('h1');

// Extract and display the text content
for ($i = 0; $i < $items->length; $i++) {
    echo $items->item($i)->nodeValue . "<br\>";
}
?>

This code outputs:

T1
T2
T3

Extended Solution:
If you need to retrieve the content between heading tags, use the following regular expression:

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

This code outputs:

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

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