Extract "data-" attributes from WooCommerce HTML tags

extract_html_atts.php

<?php 

// Extraction utility for getting attributes from HTML tag.
function extract_html_atts( $string, $prefix = "data-" ) {
	$start = 0;
	$end = 0;

	while( strpos( $string, $prefix, $end ) ) {
		$start = strpos( $string, $prefix, $start )+strlen( $prefix );
		$end   = strpos( $string, '"', $start )-1;
		$end2  = strpos( $string, '"', $end+2 );
		$array[ substr( $string, $start, $end-$start ) ] = substr( $string, $end+2, $end2-$end-2 );
	}

	return $array;
}