我们讨论了这个问题in the WordPress.org support forums. 下面是一段代码，可以实现此目的：
/*
* Let\'s add support for Photon - that won\'t be necessary once Jetpack 2.3.2 is out.
* You\'ll be able to use apply_filters( \'jetpack_photon_url\'... directly
* See http://jetpack.me/2013/07/11/photon-and-themes/
*/
if( function_exists( \'jetpack_photon_url\' ) ) {
add_filter( \'jetpack_photon_url\', \'jetpack_photon_url\', 10, 3 );
}
/*
* Let\'s add resized post thumbnails
* We use a different size on single pages
*/
function jeherve_display_custom( $content, $post ) {
global $post;
// If you didn\'t define a post thumnail, let\'s forget about all this
if ( !has_post_thumbnail( $post->ID ) )
return $content;
// What\'s the cropping and the size of image we should use on Single pages? Here we crop to top center and create a 500 x 500px image
// See http://developer.wordpress.com/docs/photon/api/#crop for parameters
if ( is_single() ) {
$args = array(
\'crop\' => \'30,0,40,50\',
\'resize\' => \'500,500\',
);
}
// resizing on other pages - some random resizing here
else {
$args = array(
\'resize\' => \'200,400\',
);
}
// Let\'s create a Photon Image URL from the Post Thumbnail
$feat_image_url = wp_get_attachment_image_src( get_post_thumbnail_id($post->ID), \'full\');
$photon_image_url = jetpack_photon_url( $feat_image_url[0], $args );
// Let\'s build the image tag, as it was built before in your example
$our_image = sprintf( \'<div class="post-media"><a class="featured-image" href="%1$s" title="%2$s"><img src="%3$s" class="wp-post-image" alt="Featured Image"></a></div>\',
esc_url( get_permalink() ),
esc_attr( sprintf( __( \'Open %s\', \'dot\' ), get_the_title() ) ),
esc_attr( $photon_image_url )
);
// Let\'s return the image, right before the post content
return $our_image . $content;
}
add_filter( \'the_content\', \'jeherve_display_custom\' );
下面是一个示例，上面提到了单页裁剪：
有关参考，您可以查看可用的光子API文档
here.
