Verwenden Sie wp_trim_excerpt, um the_excerpt () außerhalb der Schleife zu erhalten

Question

Verwenden Sie wp_trim_excerpt, um the_excerpt () außerhalb der Schleife zu erhalten

- 21
- 32468 2011-01-14
Icherstelleein Thema,das Auszüge auf der Homepagefürmöglicherweise Dutzende von Posts anzeigt. Ich habenichtfür allemeine Beiträgemanuelle Auszüge,daherist $post->post_excerptfür viele Beiträge leer. Für den Fall,dasses keinenmanuellen Auszuggibt,möchteich dieintegrierte Funktionget_the_excerpt () verwenden,dieseistjedoch außerhalb der Schleifenicht verfügbar.

Wenn Sie die Funktion aufspüren,siehtes so aus,als würde sie wp_trim_excerpt aus wp-includes/formatting.php verwenden,um Auszügeim laufenden Betrieb zuerstellen. Ich rufeesin meinem Code wie wp_trim_excerpt( $item->post_content ) auf,aberesgibt einfach den vollständigen Inhalt zurück. Macheichetwasfalsch?

Ich weiß,dassichmeine eigene Funktionerstellen kann,umeinen Auszug zuerstellen,aberich verwendenach Möglichkeitgerneintegrierte Funktionen,ummeinen Codemit anderenpotenziellen Plugins/Filtern kompatibel zu halten.

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

- Sie könnten versuchen,die Auszugsfilter aufzurufen ... `$myvar=apply_filters ('the_excerpt',$myvar);`
  
  You could try calling the excerpt filters... `$myvar = apply_filters( 'the_excerpt', $myvar );`
  - 0
  - 2011-01-15
  - t31os

7 Antworten

Stimmen

- 8
- 2011-01-14
wp_trim_excerpt() hateine etwasmerkwürdige Mechanik - wennetwas an sie übergeben wird,tutesnichts.

Hier steckt diegrundlegende Logik dahinter:

get_the_excerpt() suchtnachmanuellem Auszug;

wp_trim_excerpt()meldet sich,wennes keinenmanuellen Auszuggibt undeinen aus Inhalt oder Teasererstellt.

Beide sindeng mitglobalen Variablen und damit der Schleife verbunden.

Außerhalb der Schleifeistesbesser,Code aus wp_trim_excerpt() zuentfernen und Ihreeigene Trimmfunktion zu schreiben.
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.
- Quelle
- Rarst

6

2011-01-21

Update:

Hieristeine Ableitung von wp_trim_excerpt (),dieich verwendet habe.Funktioniertperfekt.Abgeleitet von 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);
}

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);
}

Siemüssen keineneue Antwort veröffentlichen. Sie können Ihre alte Antwortjederzeitbearbeiten,umneue Informationen aufzunehmen.Sie könnenbeispielsweise den Link zum WP-Code von Ihrerersten Antwortin diese kopieren und dann Ihreerste Antwort löschen.

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
Für Copy/Pasters da draußen:füge $ raw_excerpt=$text hinzu;

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

1

2011-08-26

Hieristmeine Einstellung zueinem "trim_excerpt",der das Post-Objekt odereine Post-ID als Parameter verwendet.

Offensichtlichbasierend auf dem,wasim Kernist. Ich weißnicht,warum dies (undget_the_author ()) keine Nicht-Loop-Äquivalente haben.

 /**
     * 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 zu Rast. Esist sehr seltsam,dassesget_the_excerpt ($post-> ID)nichtgibt,wennes ziemlich offensichtlich sein sollte,dasses sollte. Wie auchimmer,hierist 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    }

Sie könnenin Zeile 1826 sehen,dasses überget_the_contentsmit derglobalen Variablen $post verknüpftist. Undja,ich habe keine Ahnung,was sie dachten. Ersetzen Sie von hier aus denget_the_content durch $textin Ihremeigenen my_excerpt,under sollte sich ähnlich verhalten.

+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 **: Erwägen Sie die Verwendung von wp_trim_words ()

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

0

2011-04-17

Die Funktionget_the_content () würde den vollständigen Inhalt zurückgeben,wenn $more!=0. Siemüssen dieglobale Variable $more auf 0 setzen,um sicherzustellen,dass die Funktionget_the_content ()einen Auszug zurückgibt.

Geänderte Funktion wp_trim_excerpt ():

 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);
}

Quelle

- 0
- 2016-09-15
Verwenden Sie die obigen Antworten anderer. Hieristeine einfachere Antwort,die anscheinendgutfunktioniert:

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 ); }

Ich verwendeesin den <meta> -Tagsin einer Funktion zum Definieren von OpenGraph-Beschreibungen.Alsofügeicheinfach hinzu:

<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 ); ?>" />
- Wasistmit HTML-Inhalten?Wie wird diesmit Tags umgehen?Der Auszugentfernt auch HTML-Tags und Shortcodes.Wasist,wenn dieersten Wörter des Auszugsein Bildenthalten?Das wird wahrscheinlich Ihr Layoutbrechen.
  
  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

Seit WP 3.3.0ist wp_trim_words() hilfreich,wenn Sie den Inhalt abrufen können,für den Sieeinen Auszugerstellenmöchten.Ich hoffe,dasistfürjemanden hilfreich underspart das Erstelleneinereigenen Wortzählfunktion.

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