I want to overwrite the post tag with the value of the custom field.

You would like to change the post tag to the value of one or more specific custom fields.
Only one custom field could be reflected as a tag, but multiple custom field values could not be reflected as a tag.

Here's the code I've tried so far

<?php
global$post;
$post_id = $post->ID; 
$tags[] = get_post_meta($post_id, 'aaaa', $single);
$tags[] = get_post_meta($post_id, 'bbbb', $single);
$tags[] = get_post_meta($post_id, 'cccccc', $single);
$tags=array_unique(array_filter($tags);//here, adding array_filter to remove empty get_post_meta results
wp_set_post_tags($post_id, $tags, false);
?>

For the above code, only the custom key listed at the top was reflected in the tag.

global$post;
$post_id = $post->ID; 
$tags[] = get_post_meta($post_id, 'aaaa', $single);
$tags[] = get_post_meta($post_id, 'bbbb', $single);
$tags[] = get_post_meta($post_id, 'cccccc', $single);
$tags=array_unique(array_filter($tags);//here, adding array_filter to remove empty get_post_meta results
foreach($tags as$tag){
    wp_set_post_tags($post_id,$tag,false);
}

Only the custom key at the top of this code was reflected as a tag.

<?php
global$post;
$post_id = $post->ID;

$tags=get_post_meta($post_id, 'aaaaa', $single);
if(!empty($tag){wp_add_post_tags($post_id,$$tag);}

$tags=get_post_meta($post_id, 'bbbb', $single);
if(!empty($tag){wp_add_post_tags($post_id,$$tag);}

$tags=get_post_meta($post_id, 'cccccc', $single);
if(!empty($tag){wp_add_post_tags($post_id,$$tag);}

wp_set_post_tags($post_id, $tags, false);   

?>

None of the values in the custom fields were reflected as tags in the code above.

wordpress

2022-09-30 16:40

1 Answers

It seems that the reason was that it didn't come back with a string, and the third argument, true, worked easily!

2022-09-30 16:40

If you have any answers or tips

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