I have HTML strings stored in database, and I want to extract only the text content, stripping out all the HTML tags. What is the best way to do this in PHP?

I want to extract the plain text. How can I achieve this?

You can use PHP’s DOMDocument class to parse the HTML and extract the text content. Here’s how you can do it:

<?php
    require_once 'includes/connection.inc.php';

    function removeElementsByTagName($tagName, $document)
    {
        $nodeList = $document->getElementsByTagName($tagName);
        for ($nodeIdx = $nodeList->length; --$nodeIdx >= 0;) {
            $node = $nodeList->item($nodeIdx);
            $node->parentNode->removeChild($node);
        }
    }

    $fetch_data = "SELECT * FROM emails";
    $fetch_data_conn = mysqli_query($connection, $fetch_data);

    while ($row = mysqli_fetch_assoc($fetch_data_conn)) {
        $content = $row["content"];

        $doc = new DOMDocument();
        libxml_use_internal_errors(true);
        $doc->loadHTML($content);
        libxml_clear_errors();
    
        removeElementsByTagName('script', $doc);
        removeElementsByTagName('style', $doc);
        removeElementsByTagName('link', $doc);

        $textContent = strip_tags($doc->saveHTML());
    
        echo $textContent;
        echo "<hr>";
    }
    ?>

This code uses DOMDocument to parse the HTML and strip_tags to remove any remaining tags, leaving you with just the plain text content.