Segregate product tabs data from the description caused by the migration of products from Shopify to WooCommerce

tabs-seg.php

<?php

add_action('init', function() {

  // add '?tabs_seg' to home URL to execute
	if ( ! isset( $_GET['tabs_seg'] ) ) {
		return;
	}

  // process 50 products per reload
	$batch_update = 50;

	$args = array( 
		'post_type' => 'product', 
		'posts_per_page' => -1 
	);
	$products = new WP_Query( $args );

	if ( $products->have_posts() ) {

		$i = 0;
		while ( $products->have_posts() ) {
			$products->the_post();

			if ( $i >= $batch_update ) {
				break;
			}

			if ( seg_tabs( get_the_ID() ) ) {
				$i++;
			}
		}

		wp_reset_postdata();
		echo 'success';
		echo $i;
		exit;
	}

});

function seg_tabs( $product_id ) {

	$product = wc_get_product( $product_id );
	$desc = $product->get_description();

  // seperate data by tab title wrapped with <h4> tag
	$sections = explode( '<h4>', $desc, 2 );

	if ( empty( $sections ) || count( $sections ) == 1 ) {
		return false;
	}

	$final_d = $sections[0];
	$tabs = $sections[1];
	$tabs = '<h4>' . $tabs;

	$dom = new DOMDocument();
	$dom->loadHTML( '<?xml encoding="utf-8"?>' . $tabs );

	$xpath = new DOMXPath( $dom );
	$headings = $xpath->query('//h4');

	if ( empty( $headings ) ) {
		return false;
	}

	$result = array();

	foreach ( $headings as $heading ) {
		// Get the heading text
		$headingText = trim ( $heading->textContent );
	
		// Get the next sibling of the <h4> element
		$sibling = $heading->nextSibling;

		$contentArray = array();
	
		// Loop through the siblings until the next <h4> element is found
		while ( $sibling && $sibling->nodeName !== 'h4' ) {
			if ( $sibling->nodeType == XML_ELEMENT_NODE ) {
				$contentArray[] = $dom->saveHTML( $sibling );
			}
			$sibling = $sibling->nextSibling;
		}

		// Add the content to the result array with the heading text as the key
		$result[ $headingText ] = implode( '', $contentArray );
	}

	$result['desc'] = $final_d;

	// save desc data as temp backup
	update_post_meta( $product_id, 'desc_backup', $desc );

  // get product acf tab fields
	$fields = acf_get_fields('group_622f2e70ca16d');

	if ( $fields ) {
		foreach ( $fields as $field ) {
			$label = $field['label'];
			$name = $field['name'];

      // update field value per product
			update_field( $name, $result[ $label ], $product_id );
		}
	}

  // update description
	$product->set_description( $result['desc'] );
	$save = $product->save();

	return $save;
}