Question

get_the_excerpt( int|WP_Post $post = null )

Retrieves the post excerpt.

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description

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参数

$post

(int|WP_Post) (Optional) Post ID or WP_Post object. Default is global $post.

Default value: null

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返回值

(string) Post excerpt.

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源代码

File: wp-includes/post-template.php

function get_the_excerpt( $post = null ) {
	if ( is_bool( $post ) ) {
		_deprecated_argument( __FUNCTION__, '2.3.0' );
	}

	$post = get_post( $post );
	if ( empty( $post ) ) {
		return '';
	}

	if ( post_password_required( $post ) ) {
		return __( 'There is no excerpt because this is a protected post.' );
	}

	/**
	 * Filters the retrieved post excerpt.
	 *
	 * @since 1.2.0
	 * @since 4.5.0 Introduced the `$post` parameter.
	 *
	 * @param string $post_excerpt The post excerpt.
	 * @param WP_Post $post Post object.
	 */
	return apply_filters( 'get_the_excerpt', $post->post_excerpt, $post );
}

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更新日志

Version	description
4.5.0	Introduced the $post parameter.
0.71	Introduced.

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相关函数

Uses

• wp-includes/l10n.php: __()
• wp-includes/functions.php: _deprecated_argument()
• wp-includes/plugin.php: apply_filters()
• wp-includes/post-template.php: post_password_required()
• wp-includes/post-template.php: get_the_excerpt
• wp-includes/post.php: get_post()
Show 1 more use Hide more uses

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Used By

• wp-includes/embed.php: the_excerpt_embed()
• wp-admin/includes/class-wp-posts-list-table.php: WP_Posts_List_Table::column_title()
• wp-includes/feed.php: the_excerpt_rss()
• wp-includes/post-template.php: the_excerpt()

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User Contributed Notes

1. Skip to note content You must log in to vote on the helpfulness of this noteVote results for this note: 0You must log in to vote on the helpfulness of this note Contributed by hearvox

   Use excerpt for HTML meta description

   
   <!-- Use Post excerpt for meta description.  -->
   <?php if ( is_single() ) { ?>
   <meta name="description" content="<?php echo wp_strip_all_tags( get_the_excerpt(), true ); ?>" />
   <?php } ?>
   

   (Setting the second parameter of wp_strip_all_tags to true removes left over line breaks and whitespace chars.)

Use

has_excerpt()

to prevent a Notice: Undefined offset: -1 in post-template.php

$excerpt = '';
if (has_excerpt()) {
    $excerpt = wp_strip_all_tags(get_the_excerpt());
}

Otherwise, you could get an Undefined offset -1 warning, do not try to get_excerpt directly to check whether with isset or NULL, you’ll get an undefined offset -1 back

Example
get_the_excerpt() can be used to retrieve and store the value in a variable, without outputting it to the page.

<?php
$my_excerpt = get_the_excerpt();
if ( '' != $my_excerpt ) {
	// Some string manipulation performed
}
echo $my_excerpt; // Outputs the processed value to the page
?>