Obtenga un extracto usando get_the_excerpt fuera de un bucle

lo obtuve usando my_excerpt($post->post_content, get_the_excerpt()) y usando lafunción my_excerpt() de Utilizando wp_trim_excerptpara obtenerthe_excerpt ()fuera del ciclo

got it using my_excerpt($post->post_content, get_the_excerpt()) and using the my_excerpt() function from Using wp_trim_excerpt to get the_excerpt() outside the loop

Encontréestapregunta cuandobuscaba cómo haceresto sin el objeto depublicación.

Miinvestigación adicional dio como resultadoestatécnicaingeniosa:

$text = apply_filters('the_excerpt', get_post_field('post_excerpt', $post_id));

I found this question when looking how to do this without the post object.

My additional research turned up this slick technique:

$text = apply_filters('the_excerpt', get_post_field('post_excerpt', $post_id));

Comoparece que yatiene el objeto depublicaciónparael quenecesitaelextracto,puedeforzar que las cosasfuncionen:

 setup_postdata( $post );
$excerpt = get_the_excerpt();
 

Lafunción setup_postdata()globalizaráel objeto $post y lo hará disponiblepara lafunción debucle antiguonormal.Cuandoestás dentro del ciclo,llamas a the_post() y configura las cosasparati ...fuera del ciclonecesitasforzarlomanualmente.

Since it seems you already have the post object you need the excerpt for, you can just force things to work:

setup_postdata( $post );
$excerpt = get_the_excerpt();

The setup_postdata() function will globalize the $post object and make it available for regular old loop function. When you're inside the loop, you call the_post() and it sets things up for you ... outside of the loop you need to force it manually.

Pruebeesto:

Cree unanuevafunciónen functions.php y luego llámela desde cualquier lugar.

 function get_excerpt_by_id($post_id){
    $the_post = get_post($post_id); //Gets post ID
    $the_excerpt = $the_post->post_content; //Gets post_content to be used as a basis for the excerpt
    $excerpt_length = 35; //Sets excerpt length by word count
    $the_excerpt = strip_tags(strip_shortcodes($the_excerpt)); //Strips tags and images
    $words = explode(' ', $the_excerpt, $excerpt_length + 1);

    if(count($words) > $excerpt_length) :
        array_pop($words);
        array_push($words, '…');
        $the_excerpt = implode(' ', $words);
    endif;

    $the_excerpt = '<p>' . $the_excerpt . '</p>';

    return $the_excerpt;
}
 

Aquí hay unapublicación que describeel código.

Try this:

Create a new function in functions.php and then call it from wherever.

function get_excerpt_by_id($post_id){
    $the_post = get_post($post_id); //Gets post ID
    $the_excerpt = $the_post->post_content; //Gets post_content to be used as a basis for the excerpt
    $excerpt_length = 35; //Sets excerpt length by word count
    $the_excerpt = strip_tags(strip_shortcodes($the_excerpt)); //Strips tags and images
    $words = explode(' ', $the_excerpt, $excerpt_length + 1);

    if(count($words) > $excerpt_length) :
        array_pop($words);
        array_push($words, '…');
        $the_excerpt = implode(' ', $words);
    endif;

    $the_excerpt = '<p>' . $the_excerpt . '</p>';

    return $the_excerpt;
}

Here's a post describing the code.

Ahorapuede simplemente usar get_the_excerpt( $postID ) función. Desde: WordPress 4.5.0introdujoelparámetro $post.

Now you can simply use the get_the_excerpt( $postID ) function. Since: WordPress 4.5.0 introduced the $post parameter.

En caso de quenotengael objeto depublicación,aquí hay unafunción corta como la de Withers.

 function get_excerpt_by_id($post_id){
    $the_post = get_post($post_id);
    $the_excerpt = $the_post->post_excerpt; 
    return $the_excerpt;
}
 

In case you don't have the post object, here's a short function like the one from Withers.

function get_excerpt_by_id($post_id){
    $the_post = get_post($post_id);
    $the_excerpt = $the_post->post_excerpt; 
    return $the_excerpt;
}

Estoespara cuando desee utilizar get_the_excerpt()fuera del ciclo:

 function custom_get_excerpt($post_id) {
    $temp = $post;
    $post = get_post($post_id);
    setup_postdata($post);

    $excerpt = get_the_excerpt();

    wp_reset_postdata();
    $post = $temp;

    return $excerpt;
}
 

This is for when you want to use get_the_excerpt() outside the loop:

function custom_get_excerpt($post_id) {
    $temp = $post;
    $post = get_post($post_id);
    setup_postdata($post);

    $excerpt = get_the_excerpt();

    wp_reset_postdata();
    $post = $temp;

    return $excerpt;
}

Si deseagenerarelextracto automáticamente apartir del contenidoen una línea,puede usar wp_trim_words función comoesta:

 // 30 is the number of words ehere
$excerpt = wp_trim_words(get_post_field('post_content', $post_id), 30);
 

If you'd like to generate the excerpt automatically from the content in one line - you can use wp_trim_words function like this:

// 30 is the number of words ehere
$excerpt = wp_trim_words(get_post_field('post_content', $post_id), 30);

 $trimexcerpt = get_the_content();
$shortexcerpt = wp_trim_words( $trimexcerpt, $num_words = 18, $more = '… ' ); 
echo $shortexcerpt;
 

$trimexcerpt = get_the_content();
$shortexcerpt = wp_trim_words( $trimexcerpt, $num_words = 18, $more = '… ' ); 
echo $shortexcerpt;