Checkout: Filter - checkout_image_attributes Example

gistfile1.php

<?php

// $attributes = apply_filters('checkout_image_attributes', false, $image, $width, $height, $class);

function attributes($attributes = array(), $image = null, $width = null, $height = null, $class = null) {
	$attributes['data-foo'] = "foo-value";	// <img data-foo="foo-value" />
	$attributes['rel'] = "overlaybox";	// <img rel="overlaybox" />
}

add_filter('checkout_image_attributes', 'attributes', 10, 5);

?>