Usando wp_trim_excerpt para obter the_excerpt () fora do loop

Question

Usando wp_trim_excerpt para obter the_excerpt () fora do loop

- 21
- 32468 2011-01-14
|
Euestou construindo umtema que vaimostrartrechosnapáginainicialparapotencialmente dezenas deposts. Eunãotenhotrechosmanuaisem todas asminhaspostagens,então $post->post_excerptestá vazioparamuitosposts. No caso denão haver umtrechomanual,gostaria de usar afunção Get_the_excerpt ()integrada,masnãoestá disponívelfora do loop.

Rastreando afunção,parece que usa WP_TRIM_EXCERTT de WP-Inclui/Formatting.phppara criartrechosnamosca. Euestou ligandopara omeu código como wp_trim_excerpt( $item->post_content ),mas é simplesmente retornando o conteúdo completo. Estoufazendo algoerrado?

Eu sei queposso criarminhaprópriafunçãopara criar umtrecho,maseugosto de usarfunçõesinternas sempre quepossível,mantendomeu código compatível com outrospotenciaisplugins/filtros.

http://adambrown.info/p/wp_hooks/hook/wp_trim_excerpt? Version=3.0 & amp;file=wp-inclui/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

- Vocêpoderiatentar chamar osfiltros detrecho ... `$myvar=aplicação_filters ('the_excerpt',$myvar);`
  
  You could try calling the excerpt filters... `$myvar = apply_filters( 'the_excerpt', $myvar );`
  - 0
  - 2011-01-15
  - t31os

7 respostas

votos

- 8
- 2011-01-14
wp_trim_excerpt()tem umpouco demecânica curiosa - se alguma coisa épassadaparaele,entãonãofaznada.

Aquiestá a lógicabásicaportrás disso:

get_the_excerpt() verificaçõesparatrechomanual;

wp_trim_excerpt() sinaisem senão houvertrechomanuale faz um de conteúdo outeaser.

ambos estãofirmemente ligados a variáveisglobaise tão loop.

Fora do loop você émelhor detirar código do wp_trim_excerpt()e escrevendo suaprópriafunção de acabamento.
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.
- fonte
- Rarst

6

2011-01-21

Atualização:

Aquiestá uma derivada de WP_TRIM_EXCERTT () queeu usei.Funcionaperfeitamente.Derivado da versão do WordPress 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);
}

Vocênãoprecisapostar umanova resposta,você semprepodeeditar o seu antigoparaincluirnovasinformações.Vocêpoderia,porexemplo,copiar o linkpara o código WP da suaprimeira respostaparaestee,em seguida,excluir suaprimeira resposta.

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 cópia/pastorespor aí: Adicionar $ RAW_EXCERTT=$ Texto;

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

1

2011-08-26

Aquiestá aminha opinião sobre um "trim_excerpt" que leva o objeto Post ou um ID POST comoparâmetro.

Obviamente combaseno queestánonúcleo. Não seipor queisso (eget_the_author ())nãotem equivalentes denão-loop.

 /**
     * 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

+1para rast. Émuitoestranho quenãoexistetal coisa comoget_the_excert ($post->id),quando deve serbastante óbvio que deveria. De qualquerforma,aqui é wp_trim_excerpt ()no WordPress versão 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    }

Vocêpode verna linha 1826 queestá vinculado à variávelglobal de $post viaget_the_contents. E sim,eunãotenhoideia do queelesestavampensando. Mas daqui,substitua oget_the_contentpor $textem seuprópriomy_excert,e deve se comportar deforma semelhante.

+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

Afunção Get_the_Content () retornaria conteúdo completo se $mais!=0. Vocêtem que definir uma variávelglobal $maispara 0para certificar com certezaget_the_content ()trecho de retorno defunção.

função 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);
}

fonte

- 0
- 2016-09-15
Usando as respostas dos outros acima,aquiestá uma respostamais simples queparecefuncionarbem:

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 ); }

Estou usando-ono <meta>em umafunçãopara definir as descrições do OpenGraph.Entãoeu apenas adiciono:

<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 ); ?>" />
- fonte
- dpruth
- E quanto ao conteúdo HTML?Comoisso vai lidar comtags?Otrechotambémtiroutags htmle códigos de acesso.E se asprimeiraspalavras doexcerto contiverem umaimagem?Issoprovavelmente vai quebrar seu layout.
  
  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

Como o WP 3.3.0,wp_trim_words() é útil se você é capaz de obter o conteúdo que desejagerar umtrechopara.Espero que seja útilpara alguéme economiza criando suaprópriafunção de contagem depalavras.

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

fonte
jamesc