简单的 Wordpress If/Else

Question

我有两种不同的方法来显示 Wordpress 缩略图

我想做的是，显示第一种方法，如果它不可用，则使用第二种方法显示拇指。

以下是显示帖子缩略图的两种方法。

方法一

<!--Begin WordPress Featured post thumbnail-->
<div class="postthumbcon">
<?php
// check if the post has a featured image assigned to it.
if ( has_post_thumbnail() ) {
// get the src of the large size featured image
$src = wp_get_attachment_image_src( get_post_thumbnail_id($post->ID), 'large' );
$thumbnailSrc = $src[0];
// output image resized with timthumb
?>
<div class="postthumb">
">
<img src="<?php bloginfo('template_directory'); ?>/scripts/timthumb.php?src=<?php echo $thumbnailSrc; ?>&h=125&w=165" alt="">

</div>
<?php } ?>
</div>
<!--end WordPress Featured post thumbnail--> 

这是第二种方法。

<!--Begin Timthumb thumbnail-->
<?php // This will show the image and link the image to the post. Alter the width and height (in both places) to your needs. ?>

<?php if ( get_post_meta($post->ID, 'thumb', true) ) { ?>
<div class="postthumb">
" rel="bookmark" title="Permanent Link to <?php the_title(); ?>"><img src="<?php bloginfo('template_directory'); ?>/scripts/timthumb.php?src=<?php echo get_post_meta($post->ID, "thumb", $single = true); ?>&h=150&w=150&zc=1" alt="<?php the_title(); ?>" width="150" height="150" />
</div>
<?php } ?>

<!--End Timthumb thumbnail-->

Answer 1

试试这样的：

<div class="postthumbcon">
<?php
if ( has_post_thumbnail() ) {
    // method one
} else if ( get_post_meta($post->ID, 'thumb', true) ) {
    // Method two
} 
?>
</div>

这将查看帖子是否有您已经在做的缩略图，但如果它不存在，它将运行else 子句，这意味着第二个 if 语句只有在第一个失败时才会运行。

另外，我猜你的第一部分似乎是方法二中的一个链接，请参见这一行：

" rel="bookmark" title="Permanent Link to <?php the_title(); ?>"><img src="<?php bloginfo('template_directory'); ?>/scripts/timthumb.php?src=<?php echo get_post_meta($post->ID, "thumb", $single = true); ?>&h=150&w=150&zc=1" alt="<?php the_title(); ?>" width="150" height="150" />

以下是您的代码的完整外观：

<div class="postthumbcon">
    <?php
    if ( has_post_thumbnail() ) {
        $src = wp_get_attachment_image_src( get_post_thumbnail_id($post->ID), 'large' );
        $thumbnailSrc = $src[0];
    ?>
        <div class="postthumb">
            <img src="<?php bloginfo('template_directory'); ?>/scripts/timthumb.php?src=<?php echo $thumbnailSrc; ?>&h=125&w=165" alt="" />
        </div>
    <?php } else if ( get_post_meta($post->ID, 'thumb', true) ) { ?>
        <div class="postthumb">
            <a href="<?php the_permalink(); ?>" rel="bookmark" title="Permanent Link to <?php the_title(); ?>">
                <img src="<?php bloginfo('template_directory'); ?>/scripts/timthumb.php?src=<?php echo get_post_meta($post->ID, "thumb", $single = true); ?>&h=150&w=150&zc=1" alt="<?php the_title(); ?>" width="150" height="150" />
            </a>
        </div>
    <?php } ?>
</div>