hattmarris/strip-text.php

## strip-text.php
<?php
$args = array(
    'post_type' => 'post'   // just query for all posts
);

$query = new WP_Query($args); // create new WP_Query object

if($query->have_posts()) {
	while($query->have_posts()) {
		$query->the_post();
		$content = get_the_content();
		$dom = new DOMDocument; // create new PHP DOM object
		$dom->loadHTML($content, HTML_PARSE_NOIMPLIED); // load the $content into the DOM object, HTML_PARSE_NOIMPLIED prevents auto adding <html> and <body> tags
		$xpath = new DOMXpath($dom); // create new Xpath object with DOM

		foreach ($xpath->evaluate('//text()') as $node) {
		    $node->parentNode->removeChild($node); // loops through finds plain text and removes
		}

		$new_content = $dom->saveHtml($dom->documentElement); // save your new DOM with plain text removed

		// Arguments for wp_update_post
		$new_post = array(
		    'ID'           => $post->ID, // current post ID in the WP loop
		    'post_content' => $new_content
		);

		// Update the post into the database
		wp_update_post( $new_post );

	}
}
?>
	<?php
	$args = array(
	'post_type' => 'post' // just query for all posts
	);

	$query = new WP_Query($args); // create new WP_Query object

	if($query->have_posts()) {
	while($query->have_posts()) {
	$query->the_post();
	$content = get_the_content();
	$dom = new DOMDocument; // create new PHP DOM object
	$dom->loadHTML($content, HTML_PARSE_NOIMPLIED); // load the $content into the DOM object, HTML_PARSE_NOIMPLIED prevents auto adding <html> and <body> tags
	$xpath = new DOMXpath($dom); // create new Xpath object with DOM

	foreach ($xpath->evaluate('//text()') as $node) {
	$node->parentNode->removeChild($node); // loops through finds plain text and removes
	}

	$new_content = $dom->saveHtml($dom->documentElement); // save your new DOM with plain text removed

	// Arguments for wp_update_post
	$new_post = array(
	'ID' => $post->ID, // current post ID in the WP loop
	'post_content' => $new_content
	);

	// Update the post into the database
	wp_update_post( $new_post );

	}
	}
	?>