PHP if / else get_field（）与WordPress [英] PHP if/else get_field() with WordPress

问题描述

我正尝试在WP后端中为客户提供一些选项，以自定义显示在其网站首页上的轮播。我正在使用高级自定义字段来处理从客户端获取输入的问题。我想给他们两个选择：

I'm trying to give a client some options in the WP backend to customize a carousel that is displayed on their website's homepage. I am using Advanced Custom Fields to handle getting the input from the client. I want to give them two options:

选择＃1）允许客户端插入要显示的文本字符串（'carousel_title_text'）

Option #1) Allows the client to insert a string of text to be displayed ('carousel_title_text')

选项＃2）允许客户端上载要显示的徽标（ carousel_logo）

Option #2) Allows the client to upload a logo to be displayed ('carousel_logo')

我要检查代码标题文字，如果没有，则显示徽标。我还没有决定如果两个字段都为空该怎么办。无论如何，这就是我想出的：

I want the code to check for title text, and if there is none, display the logo instead. I haven't yet decided what will happen if both fields are empty. Anyway, here is what I've come up with:

<?
if( get_field('carousel_title_text') ) { ?>
  <h2 class="promo"><?php the_field('carousel_title_text');?></h2>
<? } elseif( get_field('carousel_logo') ) {
  the_field('carousel_logo');
}
?>

只要有输入，就会显示 carousel_title_text，但是当它为空时显示为 carousel_logo不是，它不能正确输出徽标。谁能告诉我我在做错什么，还是有更好的方法？

The 'carousel_title_text' displays as long as there is an input, but when it's empty and 'carousel_logo' is not, it does not properly output the logo. Can anyone tell me what I'm doing wrong or if there's a better approach?

在此先感谢

推荐答案

这听起来与徽标的设置有关，我假设徽标是图像字段？在Wordpress管理员中，该字段下会有一个名为返回值的设置，可以将其设置为数组或 URL。

This sounds like it's to do with the settings for the logo, which I'm assuming is an image field? In the Wordpress admin there will be a setting under that field called 'Return value' which can be set to either 'Array' or 'URL'.

如果将其设置为数组，则需要将该数组存储到变量中，然后按如下所示在标记中访问其属性：

If this is set to 'Array', you'd need to store that array to a variable and then access its properties in your markup like so:

<?php

    if ( get_field('carousel_title_text') ) { ?>
        <h2 class="promo"><?php the_field('carousel_title_text'); ?></h2>
    <?php } else{
        $carousel_logo = get_field('carousel_logo');
        if ( $carousel_logo ) { ?>
            <img src="<?php echo $carousel_logo['url']; ?>" />
        <?php } else { ?>
            <h2 class="promo">Default slider title </h2>
        <?php }
    }

?>

或者，您可以将字段设置为仅返回图像URL，然后像这样访问它：

Alternatively, you could set your field to only return the image URL and then access it like so:

<?php

    if ( get_field('carousel_title_text' ) { ?>
        <h2 class="promo"><?php the_field('carousel_title_text'); ?></h2>
    <?php } elseif ( $carousel_logo ) { ?>
        <img src="<?php the_field('carousel_logo'); ?>" />
    <?php } else { ?>
        <h2 class="promo">Default slider title </h2>
    <?php }

?>

ACF在图像字段上的文档将提供更多信息。

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