WordPress 获取文章内容页特色图像地址

<?php
$thumbnail_image_url = wp_get_attachment_image_src( get_post_thumbnail_id($post->ID), 'thumbnail');
echo $thumbnail_image_url[0];
?>

<?php
$medium_image_url = wp_get_attachment_image_src( get_post_thumbnail_id($post->ID), 'medium');
echo $medium_image_url[0];
?>

<?php
$large_image_url = wp_get_attachment_image_src( get_post_thumbnail_id($post->ID), 'large');
echo $large_image_url[0];
?>

<?php
$full_image_url = wp_get_attachment_image_src( get_post_thumbnail_id($post->ID), 'full');
echo $full_image_url[0];
?>

<?php
$array_image_url = wp_get_attachment_image_src( get_post_thumbnail_id($post->ID), array(100,100));
echo $array_image_url[0];
?>