Question

has_shortcode( string $content,  string $tag )

Whether the passed content contains the specified shortcode

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description

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参数

$content

(string) (Required) Content to search for shortcodes.

$tag

(string) (Required) Shortcode tag to check.

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返回值

(bool) Whether the passed content contains the given shortcode.

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源代码

File: wp-includes/shortcodes.php

function has_shortcode( $content, $tag ) {
	if ( false === strpos( $content, '[' ) ) {
		return false;
	}

	if ( shortcode_exists( $tag ) ) {
		preg_match_all( '/' . get_shortcode_regex() . '/', $content, $matches, PREG_SET_ORDER );
		if ( empty( $matches ) )
			return false;

		foreach ( $matches as $shortcode ) {
			if ( $tag === $shortcode[2] ) {
				return true;
			} elseif ( ! empty( $shortcode[5] ) && has_shortcode( $shortcode[5], $tag ) ) {
				return true;
			}
		}
	}
	return false;
}

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更新日志

Version	description
3.6.0	Introduced.

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相关函数

Uses

• wp-includes/shortcodes.php: shortcode_exists()
• wp-includes/shortcodes.php: get_shortcode_regex()
• wp-includes/shortcodes.php: has_shortcode()

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Used By

• wp-admin/includes/ajax-actions.php: wp_ajax_parse_embed()
• wp-includes/shortcodes.php: has_shortcode()
• wp-includes/media.php: get_post_galleries()

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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 Codex

   Simple Example
   Note: has_shortcode() can use a lot of re源代码s if scanning a lot of content.

   
   $content = 'This is some text, (perhaps pulled via $post->post_content). It has a  shortcode.';
   
   if ( has_shortcode( $content, 'gallery' ) ) {
   	// The content has a  short code, so this check returned true.
   }
   

Enqueue some script when some post uses some shortcode.
Note: has_shortcode() can use a lot of re源代码s if scanning a lot of content.

/**
 * Enqueue the wpdocs-script if the wpdocs-shortcode is being used
 */
function wpdocs_shortcode_scripts() {
	global $post;
	if ( is_a( $post, 'WP_Post' ) && has_shortcode( $post->post_content, 'wpdocs-shortcode') ) {
		wp_enqueue_script( 'wpdocs-script');
	}
}
add_action( 'wp_enqueue_scripts', 'wpdocs_shortcode_scripts');