get_the_id与post-> ID与the_id/get_post_meta [英] get_the_id vs. post->ID vs. the_id / get_post_meta

问题描述

我认为这肯定是一个非常基本的问题，但我只是在开始.有人可以看一下下面相同代码(?)的3个版本，并说出区别吗?他们似乎都在我正在工作的循环中正常工作.

I think it must be pretty basic question but I am only starting. Can someone have a look at the 3 versions of the same (?) code below and say what the difference is? All of them seem to work fine in the loop I am working on.

应使用以下哪个:$post->ID，$the_ID或get_the_id()? global $post;是否有必要?

Which should be used: $post->ID, $the_ID or get_the_id()? Is it necessary to have global $post;?

global $post;
$content = get_post_meta( $post->ID, ‘my_custom_field', true );
echo  $content;

或

$content = get_post_meta( $the_ID, ‘my_custom_field', true );
echo  $content;

或

$content = get_post_meta( get_the_id(), ‘my_custom_field’, true );
echo  $content;

非常感谢您的帮助

推荐答案

如果您位于WordPress循环中，则$post->ID与使用get_the_ID()

If you're inside a WordPress loop, then $post->ID it's the same as using get_the_ID()

您不必全球化$post，因为它已经在WordPress循环范围之内.

You shouldn't need to globalize $post since it's already in the scope of a WordPress loop.

我从未见过使用$the_ID编写的代码，因此我会避免使用它.

I've never seen code using $the_ID, so I would avoid using that.

最安全的选择是使用get_the_ID()

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