WordPress获取特色图像地址主要需要用到两个函数get_post_thumbnail_id和wp_get_attachment_image_src。下面是分别获取小、中、大、完整、指定图片规格的图片地址的方法

获取特色图像：小

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

获取特色图像：中

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

获取特色图像：大

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

获取特色图像：完整

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

获取特色图像：指定100×100

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