Question

wp_count_attachments( string|array $mime_type = '' )

Count number of attachments for the mime type(s).

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description

If you set the optional mime_type parameter, then an array will still be returned, but will only have the item you are looking for. It does not give you the number of attachments that are children of a post. You can get that by counting the number of children that post has.

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参数

$mime_type

(string|array) (Optional) Array or comma-separated list of MIME patterns.

Default value: ''

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返回值

(object) An object containing the attachment counts by mime type.

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源代码

File: wp-includes/post.php

function wp_count_attachments( $mime_type = '' ) {
	global $wpdb;

	$and = wp_post_mime_type_where( $mime_type );
	$count = $wpdb->get_results( "SELECT post_mime_type, COUNT( * ) AS num_posts FROM $wpdb->posts WHERE post_type = 'attachment' AND post_status != 'trash' $and GROUP BY post_mime_type", ARRAY_A );

	$counts = array();
	foreach ( (array) $count as $row ) {
		$counts[ $row['post_mime_type'] ] = $row['num_posts'];
	}
	$counts['trash'] = $wpdb->get_var( "SELECT COUNT( * ) FROM $wpdb->posts WHERE post_type = 'attachment' AND post_status = 'trash' $and");

	/**
	 * Modify returned attachment counts by mime type.
	 *
	 * @since 3.7.0
	 *
	 * @param object $counts    An object containing the attachment counts by
	 *                          mime type.
	 * @param string $mime_type The mime type pattern used to filter the attachments
	 *                          counted.
	 */
	return apply_filters( 'wp_count_attachments', (object) $counts, $mime_type );
}

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更新日志

Version	description
2.5.0	Introduced.

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相关函数

Uses

• wp-includes/plugin.php: apply_filters()
• wp-includes/post.php: wp_post_mime_type_where()
• wp-includes/post.php: wp_count_attachments
• wp-includes/wp-db.php: wpdb::get_results()
• wp-includes/wp-db.php: wpdb::get_var()

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Used By

• wp-admin/includes/media.php: media_upload_library_form()

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User Contributed Notes