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wordpress函数get_bookmarks()用法示例

get_bookmarks( string|array $args = '' )

Retrieves the list of bookmarks


描述

Attempts to retrieve from the cache first based on MD5 hash of arguments. If that fails, then the query will be built from the arguments and executed. The results will be stored to the cache.

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参数

$args

(string|array)
(Optional)
String or array of arguments to retrieve bookmarks.

  • ‘orderby’
    (string) How to order the links by. Accepts post fields. Default ‘name’.
  • ‘order’
    (string) Whether to order bookmarks in ascending or descending order. Accepts ‘ASC’ (ascending) or ‘DESC’ (descending). Default ‘ASC’.
  • ‘limit’
    (int) Amount of bookmarks to display. Accepts 1+ or -1 for all. Default -1.
  • ‘category’
    (string) Comma-separated list of category ids to include links from.
  • ‘category_name’
    (string) Category to retrieve links for by name.
  • ‘hide_invisible’
    (int|bool) Whether to show or hide links marked as ‘invisible’. Accepts 1|true or 0|false. Default 1|true.
  • ‘show_updated’
    (int|bool) Whether to display the time the bookmark was last updated. Accepts 1|true or 0|false. Default 0|false.
  • ‘include’
    (string) Comma-separated list of bookmark IDs to include.
  • ‘exclude’
    (string) Comma-separated list of bookmark IDs to exclude.

Default value: ”


返回值

(array) List of bookmark row objects.


源代码

File: wp-includes/bookmark.php

function get_bookmarks( $args = '' ) {
	global $wpdb;

	$defaults = array(
		'orderby' => 'name', 'order' => 'ASC',
		'limit' => -1, 'category' => '',
		'category_name' => '', 'hide_invisible' => 1,
		'show_updated' => 0, 'include' => '',
		'exclude' => '', 'search' => ''
	);

	$r = wp_parse_args( $args, $defaults );

	$key = md5( serialize( $r ) );
	$cache = false;
	if ( 'rand' !== $r['orderby'] && $cache = wp_cache_get( 'get_bookmarks', 'bookmark' ) ) {
		if ( is_array( $cache ) && isset( $cache[ $key ] ) ) {
			$bookmarks = $cache[ $key ];
			/**
			 * Filters the returned list of bookmarks.
			 *
			 * The first time the hook is evaluated in this file, it returns the cached
			 * bookmarks list. The second evaluation returns a cached bookmarks list if the
			 * link category is passed but does not exist. The third evaluation returns
			 * the full cached results.
			 *
			 * @since 2.1.0
			 *
			 * @see get_bookmarks()
			 *
			 * @param array $bookmarks List of the cached bookmarks.
			 * @param array $r         An array of bookmark query arguments.
			 */
			return apply_filters( 'get_bookmarks', $bookmarks, $r );
		}
	}

	if ( ! is_array( $cache ) ) {
		$cache = array();
	}

	$inclusions = '';
	if ( ! empty( $r['include'] ) ) {
		$r['exclude'] = '';  //ignore exclude, category, and category_name params if using include
		$r['category'] = '';
		$r['category_name'] = '';
		$inclinks = preg_split( '/[\s,]+/', $r['include'] );
		if ( count( $inclinks ) ) {
			foreach ( $inclinks as $inclink ) {
				if ( empty( $inclusions ) ) {
					$inclusions = ' AND ( link_id = ' . intval( $inclink ) . ' ';
				} else {
					$inclusions .= ' OR link_id = ' . intval( $inclink ) . ' ';
				}
			}
		}
	}
	if (! empty( $inclusions ) ) {
		$inclusions .= ')';
	}

	$exclusions = '';
	if ( ! empty( $r['exclude'] ) ) {
		$exlinks = preg_split( '/[\s,]+/', $r['exclude'] );
		if ( count( $exlinks ) ) {
			foreach ( $exlinks as $exlink ) {
				if ( empty( $exclusions ) ) {
					$exclusions = ' AND ( link_id <> ' . intval( $exlink ) . ' ';
				} else {
					$exclusions .= ' AND link_id <> ' . intval( $exlink ) . ' ';
				}
			}
		}
	}
	if ( ! empty( $exclusions ) ) {
		$exclusions .= ')';
	}

	if ( ! empty( $r['category_name'] ) ) {
		if ( $r['category'] = get_term_by('name', $r['category_name'], 'link_category') ) {
			$r['category'] = $r['category']->term_id;
		} else {
			$cache[ $key ] = array();
			wp_cache_set( 'get_bookmarks', $cache, 'bookmark' );
			/** This filter is documented in wp-includes/bookmark.php */
			return apply_filters( 'get_bookmarks', array(), $r );
		}
	}

	$search = '';
	if ( ! empty( $r['search'] ) ) {
		$like = '%' . $wpdb->esc_like( $r['search'] ) . '%';
		$search = $wpdb->prepare(" AND ( (link_url LIKE %s) OR (link_name LIKE %s) OR (link_ 描述 LIKE %s) ) ", $like, $like, $like );
	}

	$category_query = '';
	$join = '';
	if ( ! empty( $r['category'] ) ) {
		$incategories = preg_split( '/[\s,]+/', $r['category'] );
		if ( count($incategories) ) {
			foreach ( $incategories as $incat ) {
				if ( empty( $category_query ) ) {
					$category_query = ' AND ( tt.term_id = ' . intval( $incat ) . ' ';
				} else {
					$category_query .= ' OR tt.term_id = ' . intval( $incat ) . ' ';
				}
			}
		}
	}
	if ( ! empty( $category_query ) ) {
		$category_query .= ") AND taxonomy = 'link_category'";
		$join = " INNER JOIN $wpdb->term_relationships AS tr ON ($wpdb->links.link_id = tr.object_id) INNER JOIN $wpdb->term_taxonomy as tt ON tt.term_taxonomy_id = tr.term_taxonomy_id";
	}

	if ( $r['show_updated'] ) {
		$recently_updated_test = ", IF (DATE_ADD(link_updated, INTERVAL 120 MINUTE) >= NOW(), 1,0) as recently_updated ";
	} else {
		$recently_updated_test = '';
	}

	$get_updated = ( $r['show_updated'] ) ? ', UNIX_TIMESTAMP(link_updated) AS link_updated_f ' : '';

	$orderby = strtolower( $r['orderby'] );
	$length = '';
	switch ( $orderby ) {
		case 'length':
			$length = ", CHAR_LENGTH(link_name) AS length";
			break;
		case 'rand':
			$orderby = 'rand()';
			break;
		case 'link_id':
			$orderby = "$wpdb->links.link_id";
			break;
		default:
			$orderparams = array();
			$keys = array( 'link_id', 'link_name', 'link_url', 'link_visible', 'link_rating', 'link_owner', 'link_updated', 'link_notes', 'link_ 描述' );
			foreach ( explode( ',', $orderby ) as $ordparam ) {
				$ordparam = trim( $ordparam );

				if ( in_array( 'link_' . $ordparam, $keys ) ) {
					$orderparams[] = 'link_' . $ordparam;
				} elseif ( in_array( $ordparam, $keys ) ) {
					$orderparams[] = $ordparam;
				}
			}
			$orderby = implode( ',', $orderparams );
	}

	if ( empty( $orderby ) ) {
		$orderby = 'link_name';
	}

	$order = strtoupper( $r['order'] );
	if ( '' !== $order && ! in_array( $order, array( 'ASC', 'DESC' ) ) ) {
		$order = 'ASC';
	}

	$visible = '';
	if ( $r['hide_invisible'] ) {
		$visible = "AND link_visible = 'Y'";
	}

	$query = "SELECT * $length $recently_updated_test $get_updated FROM $wpdb->links $join WHERE 1=1 $visible $category_query";
	$query .= " $exclusions $inclusions $search";
	$query .= " ORDER BY $orderby $order";
	if ( $r['limit'] != -1 ) {
		$query .= ' LIMIT ' . $r['limit'];
	}

	$results = $wpdb->get_results( $query );

	if ( 'rand()' !== $orderby ) {
		$cache[ $key ] = $results;
		wp_cache_set( 'get_bookmarks', $cache, 'bookmark' );
	}

	/** This filter is documented in wp-includes/bookmark.php */
	return apply_filters( 'get_bookmarks', $results, $r );
}

更新日志

Version 描述
2.1.0 Introduced.

相关函数

Uses

  • wp-includes/wp-db.php:
    wpdb::esc_like()
  • wp-includes/cache.php:
    wp_cache_get()
  • wp-includes/cache.php:
    wp_cache_set()
  • wp-includes/functions.php:
    wp_parse_args()
  • wp-includes/taxonomy.php:
    get_term_by()
  • wp-includes/plugin.php:
    apply_filters()
  • wp-includes/bookmark.php:
    get_bookmarks
  • wp-includes/wp-db.php:
    wpdb::get_results()
  • wp-includes/wp-db.php:
    wpdb::prepare()
  • Show 4 more uses


Used By

  • wp-admin/includes/class-wp-links-list-table.php:
    WP_Links_List_Table::prepare_items()
  • wp-includes/deprecated.php:
    get_links()
  • wp-includes/deprecated.php:
    get_linkobjects()
  • wp-includes/bookmark-template.php:
    wp_list_bookmarks()

  1. Skip to note content

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    Contributed by Codex

    Example

    – Create a link category named “相关函数 Sites”
    – Create a few links, adding them to the “相关函数 Sites” category

    You may use the following code in your templates to retrieve the links:

    
    $bookmarks = get_bookmarks( array(
    	'orderby'        => 'name',
    	'order'          => 'ASC',
    	'category_name'  => '相关函数 Sites'
    ) );
    
    // Loop through each bookmark and print formatted output
    foreach ( $bookmarks as $bookmark ) { 
        printf( '<a class="相关函数 link" href="%1$s">%2$s</a><br />', esc_attr( $bookmark->link_url ), $bookmark->link_name );
    }
    

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