Wordpress:如何根据参数获取不同的摘录长度 [英] Wordpress: How to obtain different excerpt lengths depending on a parameter

问题描述

wordpress 中的摘录长度默认为 55 个字.

The length of the excerpt in wordpress is 55 words by default.

我可以用下面的代码修改这个值:

I can modify this value with the following code:

function new_excerpt_length($length) {
    return 20;
}
add_filter('excerpt_length', 'new_excerpt_length');

因此，以下调用将仅返回 20 个单词:

So, the following call will return just 20 words:

the_excerpt();

但是我不知道如何添加一个参数来获取不同的长度，以便我可以调用，例如:

But I can't figure out how could I add a parameter to obtain different lengths, so that I could call, for example:

the_excerpt(20);

the_excerpt(34);

有什么想法吗?谢谢！

推荐答案

嗯，再次回答我，解决方案其实很琐碎.据我所知，将参数传递给函数 my_excerpt_length() 是不可能的(除非你想修改 wordpress 的核心代码)，但可以使用全局变量.所以，你可以在你的functions.php文件中添加这样的东西:

uhm, answering me again, the solution was actually quite trivial. it's not possible, as far as i know, to pass a parameter to the function my_excerpt_length() (unless you want to modify the core code of wordpress), but it is possible to use a global variable. so, you can add something like this to your functions.php file:

function my_excerpt_length() {
global $myExcerptLength;

if ($myExcerptLength) {
    return $myExcerptLength;
} else {
    return 80; //default value
    }
}
add_filter('excerpt_length', 'my_excerpt_length');

然后，在循环内调用摘录之前，您为 $myExcerptLength 指定一个值(如果您想为其余帖子使用默认值，请不要忘记将其重新设置为 0):

And then, before calling the excerpt within the loop, you specify a value for $myExcerptLength (don't forget to set it back to 0 if you want to have the default value for the rest of your posts):

<?php
    $myExcerptLength=35;
    echo get_the_excerpt();
    $myExcerptLength=0;
?>

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