Usando wp_trim_excerpt para obtener the_excerpt () fuera del ciclo

Question

Usando wp_trim_excerpt para obtener the_excerpt () fuera del ciclo

- 21
- 32468 2011-01-14
Estoy creando untema quemostraráextractosen lapágina deinicio depotencialmente docenas depublicaciones. Notengoextractosmanualesen todasmispublicaciones,por lo que $post->post_excerptestá vacíoparamuchaspublicaciones. Enel caso de queno haya unextractomanual,me gustaría usar lafunciónincorporadaget_the_excerpt (),peronoestá disponiblefuera del ciclo.

Al rastrear lafunción,parece que usa wp_trim_excerpt de wp-includes/formatting.phppara crearextractos sobre lamarcha. Lo llamoen mi código como wp_trim_excerpt( $item->post_content ),pero simplemente devuelveel contenido completo. ¿Estoy haciendo algomal?

Sé quepuedo crearmi propiafunciónpara crear unextracto,perome gusta usarfuncionesintegradas siempre que seaposible,manteniendomi código compatible con otros complementos/filtrospotenciales.

http://adambrown.info/p/wp_hooks/hook/wp_trim_excerpt? version=3.0 & amp;file=wp-includes/formatting.php

I'm building a theme that is going to show excerpts on the homepage for potentially dozens of posts. I don't have manual excerpts on all of my posts, so $post->post_excerpt is empty for many posts. In the event that there isn't a manual excerpt, I would like to use the built-in get_the_excerpt() function, but it isn't available outside the loop.

Tracking down the function, it looks like it uses wp_trim_excerpt from wp-includes/formatting.php to create excerpts on the fly. I am calling it in my code like wp_trim_excerpt( $item->post_content ), but it is simply returning the full content. Am I doing something wrong?

I know that I can create my own function to create an excerpt, but I like to use built-in functions where possible, keeping my code compatible with other potential plugins / filters.

http://adambrown.info/p/wp_hooks/hook/wp_trim_excerpt?version=3.0&file=wp-includes/formatting.php

excerpt

- Podríaintentar llamar a losfiltros deextractos ... `$myvar=apply_filters ('the_excerpt',$myvar);`
  
  You could try calling the excerpt filters... `$myvar = apply_filters( 'the_excerpt', $myvar );`
  - 0
  - 2011-01-15
  - t31os

7 respuestas

votos

- 8
- 2011-01-14
wp_trim_excerpt()tiene unamecánica unpoco curiosa: si se lepasa algo,no hacenada.

Aquí hay una lógicabásica detrás deesto:

get_the_excerpt() compruebaelextractomanual;

wp_trim_excerpt()interviene sino hay unextractomanual y crea uno apartir del contenido o del avance.

Ambos estánestrechamente vinculados a variablesglobales y,portanto,Loop.

Fuera delbucle,esmejor sacarel código de wp_trim_excerpt() yescribir supropiafunción de recorte.
wp_trim_excerpt() has a little curious mechanics - if anything is passed to it then it does nothing.

Here is basic logic behind it:

get_the_excerpt() checks for manual excerpt;

wp_trim_excerpt() chimes in if there is no manual excerpt and makes one from content or teaser.

Both are tightly tied to global variables and so Loop.

Outside the Loop you are better of taking code out of wp_trim_excerpt() and writing your own trim function.
- fuente
- Rarst

6

2011-01-21

Actualización:

Aquí hay un derivado de wp_trim_excerpt () que usé.Funcionaperfectamente.Derivado de Wordpress versión 3.0.4

 function my_excerpt($text, $excerpt)
{
    if ($excerpt) return $excerpt;

    $text = strip_shortcodes( $text );

    $text = apply_filters('the_content', $text);
    $text = str_replace(']]>', ']]&gt;', $text);
    $text = strip_tags($text);
    $excerpt_length = apply_filters('excerpt_length', 55);
    $excerpt_more = apply_filters('excerpt_more', ' ' . '[...]');
    $words = preg_split("/[\n\r\t ]+/", $text, $excerpt_length + 1, PREG_SPLIT_NO_EMPTY);
    if ( count($words) > $excerpt_length ) {
            array_pop($words);
            $text = implode(' ', $words);
            $text = $text . $excerpt_more;
    } else {
            $text = implode(' ', $words);
    }

    return apply_filters('wp_trim_excerpt', $text, $raw_excerpt);
}

Update:

Here is a derivative of wp_trim_excerpt() which I used. Works perfectly. Derived from Wordpress version 3.0.4

function my_excerpt($text, $excerpt)
{
    if ($excerpt) return $excerpt;

    $text = strip_shortcodes( $text );

    $text = apply_filters('the_content', $text);
    $text = str_replace(']]>', ']]&gt;', $text);
    $text = strip_tags($text);
    $excerpt_length = apply_filters('excerpt_length', 55);
    $excerpt_more = apply_filters('excerpt_more', ' ' . '[...]');
    $words = preg_split("/[\n\r\t ]+/", $text, $excerpt_length + 1, PREG_SPLIT_NO_EMPTY);
    if ( count($words) > $excerpt_length ) {
            array_pop($words);
            $text = implode(' ', $words);
            $text = $text . $excerpt_more;
    } else {
            $text = implode(' ', $words);
    }

    return apply_filters('wp_trim_excerpt', $text, $raw_excerpt);
}

Notiene quepublicar unanueva respuesta,siemprepuedeeditar la anteriorparaincluirnuevainformación.Podría,porejemplo,copiarelenlace al código WP de suprimera respuesta aesta y luegoeliminar suprimera respuesta.

You don't have to post a new answer, you can always edit your old one to include new information. You could, for example, copy the link to the WP code from your first answer into this one and then delete your first answer.
- 0
- 2011-01-25
- Jan Fabry
Para copiar/pegar: agregue $ raw_excerpt=$text;

For copy/pasters out there: add $raw_excerpt = $text;
- 0
- 2015-04-11
- Svetoslav Marinov

1

2011-08-26

Aquíestámi opinión sobre un "trim_excerpt" quetomael objeto depublicación o un ID depublicación comoparámetro.

Obviamentebasadoen lo que hayen elnúcleo. No sépor quéesto (yget_the_author ())notienen equivalentes sinbucle.

 /**
     * Generates an excerpt from the content, if needed.
     *
     * @param int|object $post_or_id can be the post ID, or the actual $post object itself
     * @param string $excerpt_more the text that is applied to the end of the excerpt if we algorithically snip it
     * @return string the snipped excerpt or the manual excerpt if it exists         
     */
    function zg_trim_excerpt($post_or_id, $excerpt_more = ' [...]') {
        if ( is_object( $post_or_id ) ) $postObj = $post_or_id;
        else $postObj = get_post($post_or_id);

        $raw_excerpt = $text = $postObj->post_excerpt;
        if ( '' == $text ) {
            $text = $postObj->post_content;

            $text = strip_shortcodes( $text );

            $text = apply_filters('the_content', $text);
            $text = str_replace(']]>', ']]&gt;', $text);
            $text = strip_tags($text);
            $excerpt_length = apply_filters('excerpt_length', 55);

            // don't automatically assume we will be using the global "read more" link provided by the theme
            // $excerpt_more = apply_filters('excerpt_more', ' ' . '[...]');
            $words = preg_split("/[\n\r\t ]+/", $text, $excerpt_length + 1, PREG_SPLIT_NO_EMPTY);
            if ( count($words) > $excerpt_length ) {
                array_pop($words);
                $text = implode(' ', $words);
                $text = $text . $excerpt_more;
            } else {
                $text = implode(' ', $words);
            }
        }
        return apply_filters('wp_trim_excerpt', $text, $raw_excerpt);
    }

Here's my take on a "trim_excerpt" that takes the post object or a post ID as a parameter.

Obviously based on what's in core. Don't know why this (and get_the_author()) don't have non-loop equivalents.

/**
     * Generates an excerpt from the content, if needed.
     *
     * @param int|object $post_or_id can be the post ID, or the actual $post object itself
     * @param string $excerpt_more the text that is applied to the end of the excerpt if we algorithically snip it
     * @return string the snipped excerpt or the manual excerpt if it exists         
     */
    function zg_trim_excerpt($post_or_id, $excerpt_more = ' [...]') {
        if ( is_object( $post_or_id ) ) $postObj = $post_or_id;
        else $postObj = get_post($post_or_id);

        $raw_excerpt = $text = $postObj->post_excerpt;
        if ( '' == $text ) {
            $text = $postObj->post_content;

            $text = strip_shortcodes( $text );

            $text = apply_filters('the_content', $text);
            $text = str_replace(']]>', ']]&gt;', $text);
            $text = strip_tags($text);
            $excerpt_length = apply_filters('excerpt_length', 55);

            // don't automatically assume we will be using the global "read more" link provided by the theme
            // $excerpt_more = apply_filters('excerpt_more', ' ' . '[...]');
            $words = preg_split("/[\n\r\t ]+/", $text, $excerpt_length + 1, PREG_SPLIT_NO_EMPTY);
            if ( count($words) > $excerpt_length ) {
                array_pop($words);
                $text = implode(' ', $words);
                $text = $text . $excerpt_more;
            } else {
                $text = implode(' ', $words);
            }
        }
        return apply_filters('wp_trim_excerpt', $text, $raw_excerpt);
    }

0

2011-01-21

+1 a Rast. Esmuyextraño quenoexistaget_the_excerpt ($post-> ID),cuando debería serbastante obvio que debería. Detodosmodos,aquíestá wp_trim_excerpt ()en wordpress versión 3.0.4:

http://core.trac. wordpress.org/browser/tags/3.0.4/wp-includes/formatting.php

 function wp_trim_excerpt($text) {
1824            $raw_excerpt = $text;
1825            if ( '' == $text ) {
1826                    $text = get_the_content('');
1827    
1828                    $text = strip_shortcodes( $text );
1829    
1830                    $text = apply_filters('the_content', $text);
1831                    $text = str_replace(']]>', ']]&gt;', $text);
1832                    $text = strip_tags($text);
1833                    $excerpt_length = apply_filters('excerpt_length', 55);
1834                    $excerpt_more = apply_filters('excerpt_more', ' ' . '[...]');
1835                    $words = preg_split("/[\n\r\t ]+/", $text, $excerpt_length + 1, PREG_SPLIT_NO_EMPTY);
1836                    if ( count($words) > $excerpt_length ) {
1837                            array_pop($words);
1838                            $text = implode(' ', $words);
1839                            $text = $text . $excerpt_more;
1840                    } else {
1841                            $text = implode(' ', $words);
1842                    }
1843            }
1844            return apply_filters('wp_trim_excerpt', $text, $raw_excerpt);
1845    }

Puede veren la línea 1826 queestá vinculado a la variableglobal $post através deget_the_contents. Y sí,notengoni idea de quéestabanpensando. Pero apartir de aquí,reemplaceget_the_content con $texten supropiomy_excerpt,y debería comportarse demanera similar.

+1 to Rast. It is very weird that there is no such thing as get_the_excerpt($post->ID), when it should be quite obvious that it should. Anyway, here is wp_trim_excerpt() in wordpress version 3.0.4:

http://core.trac.wordpress.org/browser/tags/3.0.4/wp-includes/formatting.php

function wp_trim_excerpt($text) {
1824            $raw_excerpt = $text;
1825            if ( '' == $text ) {
1826                    $text = get_the_content('');
1827    
1828                    $text = strip_shortcodes( $text );
1829    
1830                    $text = apply_filters('the_content', $text);
1831                    $text = str_replace(']]>', ']]&gt;', $text);
1832                    $text = strip_tags($text);
1833                    $excerpt_length = apply_filters('excerpt_length', 55);
1834                    $excerpt_more = apply_filters('excerpt_more', ' ' . '[...]');
1835                    $words = preg_split("/[\n\r\t ]+/", $text, $excerpt_length + 1, PREG_SPLIT_NO_EMPTY);
1836                    if ( count($words) > $excerpt_length ) {
1837                            array_pop($words);
1838                            $text = implode(' ', $words);
1839                            $text = $text . $excerpt_more;
1840                    } else {
1841                            $text = implode(' ', $words);
1842                    }
1843            }
1844            return apply_filters('wp_trim_excerpt', $text, $raw_excerpt);
1845    }

You can see on line 1826 that it is linked to the $post global variable via get_the_contents. And yes, I have no idea what were they thinking. But from here, replace the get_the_content with $text in your own my_excerpt, and it should behave in a similar fashion.

** azure_ardee **: considere usar wp_trim_words ()

**azure_ardee**: consider using wp_trim_words()
- 0
- 2012-12-03

0

2011-04-17

Lafunciónget_the_content () devolveríael contenido completo si $more!=0. Debeestablecer la variableglobal $moreen 0para asegurarse de que lafunciónget_the_content () devuelvaelextracto.

Función wp_trim_excerpt ()modificada:

 function wp_trim_excerpt($text) {
    $raw_excerpt = $text;
    if ( '' == $text ) {
        global $more;
        $tmp = $more;
        $more = 0;
        $text = get_the_content('');
        $more = $tmp;

        $text = strip_shortcodes( $text );

        $text = apply_filters('the_content', $text);
        $text = str_replace(']]>', ']]&gt;', $text);
        $text = strip_tags($text);
        $excerpt_length = apply_filters('excerpt_length', 55);
        $excerpt_more = apply_filters('excerpt_more', ' ' . '[...]');
        $words = preg_split("/[\n\r\t ]+/", $text, $excerpt_length + 1, PREG_SPLIT_NO_EMPTY);
        if ( count($words) > $excerpt_length ) {
            array_pop($words);
            $text = implode(' ', $words);
            $text = $text . $excerpt_more;
        } else {
            $text = implode(' ', $words);
        }
    }
    return apply_filters('wp_trim_excerpt', $text, $raw_excerpt);
}

The get_the_content() function would return full content if $more != 0. You have to set global variable $more to 0 to make sure get_the_content() function return excerpt.

Modified wp_trim_excerpt() function:

function wp_trim_excerpt($text) {
    $raw_excerpt = $text;
    if ( '' == $text ) {
        global $more;
        $tmp = $more;
        $more = 0;
        $text = get_the_content('');
        $more = $tmp;

        $text = strip_shortcodes( $text );

        $text = apply_filters('the_content', $text);
        $text = str_replace(']]>', ']]&gt;', $text);
        $text = strip_tags($text);
        $excerpt_length = apply_filters('excerpt_length', 55);
        $excerpt_more = apply_filters('excerpt_more', ' ' . '[...]');
        $words = preg_split("/[\n\r\t ]+/", $text, $excerpt_length + 1, PREG_SPLIT_NO_EMPTY);
        if ( count($words) > $excerpt_length ) {
            array_pop($words);
            $text = implode(' ', $words);
            $text = $text . $excerpt_more;
        } else {
            $text = implode(' ', $words);
        }
    }
    return apply_filters('wp_trim_excerpt', $text, $raw_excerpt);
}

fuente

- 0
- 2016-09-15
Utilizando las respuestas anteriores de otros,aquí hay una respuestamás simple queparecefuncionarbien:

global $post; $excerpt = apply_filters('get_the_excerpt', get_post_field('post_excerpt', $post->ID)); if ( $excerpt == '' ) { $excerpt = wp_trim_words( $post->post_content, 55 ); }

Loestoy usandoen lasetiquetas <meta>en unafunciónpara definir descripciones de OpenGraph.Entonces solo agrego:

<meta property="og:description" content="<?php echo esc_html( $excerpt ); ?>" />
Using others' answers above, here's a simpler answer that seems to work well:

global $post; $excerpt = apply_filters('get_the_excerpt', get_post_field('post_excerpt', $post->ID)); if ( $excerpt == '' ) { $excerpt = wp_trim_words( $post->post_content, 55 ); }

I'm using it in the <meta> tags in a function to define OpenGraph descriptions. So then I just add:

<meta property="og:description" content="<?php echo esc_html( $excerpt ); ?>" />
- ¿Quépasa conel contenido HTML?¿Cómotrataráesto con lasetiquetas?elextractotambiénelimina lasetiquetas html y los códigos cortos.¿Quépasa si lasprimeraspalabras delextracto contienen unaimagen?Esoprobablemente romperá su diseño.
  
  What about HTML content? How will this deal with tags? the excerpt also strips html tags and shortcodes. what if the first words of the excerpt contain an image? That will probably break your layout.
  - 0
  - 2019-12-04
  - brett

jamesc · Accepted Answer · 2012-03-22

22

2012-03-22

Desde WP 3.3.0,wp_trim_words()es útil sipuede obtenerel contenidoparael que deseagenerar unextracto.Espero que sea útilpara alguien y le ahorre crear supropiafunción de conteo depalabras.

http://codex.wordpress.org/Function_Reference/wp_trim_words