<h3>Düzenle: bookmark.php</h3>
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/**
 * Link/Bookmark API
 *
 * @package WordPress
 * @subpackage Bookmark
 */

/**
 * Retrieves bookmark data.
 *
 * @since 2.1.0
 *
 * @global object $link Current link object.
 * @global wpdb   $wpdb WordPress database abstraction object.
 *
 * @param int|stdClass $bookmark
 * @param string       $output   Optional. The required return type. One of OBJECT, ARRAY_A, or ARRAY_N, which
 *                               correspond to an stdClass object, an associative array, or a numeric array,
 *                               respectively. Default OBJECT.
 * @param string       $filter   Optional. How to sanitize bookmark fields. Default &#039;raw&#039;.
 * @return array|object|null Type returned depends on $output value.
 */
function get_bookmark( $bookmark, $output = OBJECT, $filter = &#039;raw&#039; ) {
	global $wpdb;

	if ( empty( $bookmark ) ) {
		if ( isset( $GLOBALS[&#039;link&#039;] ) ) {
			$_bookmark = &amp; $GLOBALS[&#039;link&#039;];
		} else {
			$_bookmark = null;
		}
	} elseif ( is_object( $bookmark ) ) {
		wp_cache_add( $bookmark-&gt;link_id, $bookmark, &#039;bookmark&#039; );
		$_bookmark = $bookmark;
	} else {
		if ( isset( $GLOBALS[&#039;link&#039;] ) &amp;&amp; ( $GLOBALS[&#039;link&#039;]-&gt;link_id === $bookmark ) ) {
			$_bookmark = &amp; $GLOBALS[&#039;link&#039;];
		} else {
			$_bookmark = wp_cache_get( $bookmark, &#039;bookmark&#039; );
			if ( ! $_bookmark ) {
				$_bookmark = $wpdb-&gt;get_row( $wpdb-&gt;prepare( &quot;SELECT * FROM $wpdb-&gt;links WHERE link_id = %d LIMIT 1&quot;, $bookmark ) );
				if ( $_bookmark ) {
					$_bookmark-&gt;link_category = array_unique( wp_get_object_terms( $_bookmark-&gt;link_id, &#039;link_category&#039;, array( &#039;fields&#039; =&gt; &#039;ids&#039; ) ) );
					wp_cache_add( $_bookmark-&gt;link_id, $_bookmark, &#039;bookmark&#039; );
				}
			}
		}
	}

	if ( ! $_bookmark ) {
		return $_bookmark;
	}

	$_bookmark = sanitize_bookmark( $_bookmark, $filter );

	if ( OBJECT === $output ) {
		return $_bookmark;
	} elseif ( ARRAY_A === $output ) {
		return get_object_vars( $_bookmark );
	} elseif ( ARRAY_N === $output ) {
		return array_values( get_object_vars( $_bookmark ) );
	} else {
		return $_bookmark;
	}
}

/**
 * Retrieves single bookmark data item or field.
 *
 * @since 2.3.0
 *
 * @param string $field    The name of the data field to return.
 * @param int    $bookmark The bookmark ID to get field.
 * @param string $context  Optional. The context of how the field will be used. Default &#039;display&#039;.
 * @return string|WP_Error
 */
function get_bookmark_field( $field, $bookmark, $context = &#039;display&#039; ) {
	$bookmark = (int) $bookmark;
	$bookmark = get_bookmark( $bookmark );

	if ( is_wp_error( $bookmark ) ) {
		return $bookmark;
	}

	if ( ! is_object( $bookmark ) ) {
		return &#039;&#039;;
	}

	if ( ! isset( $bookmark-&gt;$field ) ) {
		return &#039;&#039;;
	}

	return sanitize_bookmark_field( $field, $bookmark-&gt;$field, $bookmark-&gt;link_id, $context );
}

/**
 * Retrieves the list of bookmarks.
 *
 * 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.
 *
 * @since 2.1.0
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param string|array $args {
 *     Optional. String or array of arguments to retrieve bookmarks.
 *
 *     @type string   $orderby        How to order the links by. Accepts &#039;id&#039;, &#039;link_id&#039;, &#039;name&#039;, &#039;link_name&#039;,
 *                                    &#039;url&#039;, &#039;link_url&#039;, &#039;visible&#039;, &#039;link_visible&#039;, &#039;rating&#039;, &#039;link_rating&#039;,
 *                                    &#039;owner&#039;, &#039;link_owner&#039;, &#039;updated&#039;, &#039;link_updated&#039;, &#039;notes&#039;, &#039;link_notes&#039;,
 *                                    &#039;description&#039;, &#039;link_description&#039;, &#039;length&#039; and &#039;rand&#039;.
 *                                    When `$orderby` is &#039;length&#039;, orders by the character length of
 *                                    &#039;link_name&#039;. Default &#039;name&#039;.
 *     @type string   $order          Whether to order bookmarks in ascending or descending order.
 *                                    Accepts &#039;ASC&#039; (ascending) or &#039;DESC&#039; (descending). Default &#039;ASC&#039;.
 *     @type int      $limit          Amount of bookmarks to display. Accepts any positive number or
 *                                    -1 for all.  Default -1.
 *     @type string   $category       Comma-separated list of category IDs to include links from.
 *                                    Default empty.
 *     @type string   $category_name  Category to retrieve links for by name. Default empty.
 *     @type int|bool $hide_invisible Whether to show or hide links marked as &#039;invisible&#039;. Accepts
 *                                    1|true or 0|false. Default 1|true.
 *     @type int|bool $show_updated   Whether to display the time the bookmark was last updated.
 *                                    Accepts 1|true or 0|false. Default 0|false.
 *     @type string   $include        Comma-separated list of bookmark IDs to include. Default empty.
 *     @type string   $exclude        Comma-separated list of bookmark IDs to exclude. Default empty.
 *     @type string   $search         Search terms. Will be SQL-formatted with wildcards before and after
 *                                    and searched in &#039;link_url&#039;, &#039;link_name&#039; and &#039;link_description&#039;.
 *                                    Default empty.
 * }
 * @return object[] List of bookmark row objects.
 */
function get_bookmarks( $args = &#039;&#039; ) {
	global $wpdb;

	$defaults = array(
		&#039;orderby&#039;        =&gt; &#039;name&#039;,
		&#039;order&#039;          =&gt; &#039;ASC&#039;,
		&#039;limit&#039;          =&gt; -1,
		&#039;category&#039;       =&gt; &#039;&#039;,
		&#039;category_name&#039;  =&gt; &#039;&#039;,
		&#039;hide_invisible&#039; =&gt; 1,
		&#039;show_updated&#039;   =&gt; 0,
		&#039;include&#039;        =&gt; &#039;&#039;,
		&#039;exclude&#039;        =&gt; &#039;&#039;,
		&#039;search&#039;         =&gt; &#039;&#039;,
	);

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

	$key   = md5( serialize( $parsed_args ) );
	$cache = wp_cache_get( &#039;get_bookmarks&#039;, &#039;bookmark&#039; );

	if ( &#039;rand&#039; !== $parsed_args[&#039;orderby&#039;] &amp;&amp; $cache ) {
		if ( is_array( $cache ) &amp;&amp; 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 $parsed_args An array of bookmark query arguments.
			 */
			return apply_filters( &#039;get_bookmarks&#039;, $bookmarks, $parsed_args );
		}
	}

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

	$inclusions = &#039;&#039;;
	if ( ! empty( $parsed_args[&#039;include&#039;] ) ) {
		$parsed_args[&#039;exclude&#039;]       = &#039;&#039;;  // Ignore exclude, category, and category_name params if using include.
		$parsed_args[&#039;category&#039;]      = &#039;&#039;;
		$parsed_args[&#039;category_name&#039;] = &#039;&#039;;

		$inclinks = wp_parse_id_list( $parsed_args[&#039;include&#039;] );
		if ( count( $inclinks ) ) {
			foreach ( $inclinks as $inclink ) {
				if ( empty( $inclusions ) ) {
					$inclusions = &#039; AND ( link_id = &#039; . $inclink . &#039; &#039;;
				} else {
					$inclusions .= &#039; OR link_id = &#039; . $inclink . &#039; &#039;;
				}
			}
		}
	}
	if ( ! empty( $inclusions ) ) {
		$inclusions .= &#039;)&#039;;
	}

	$exclusions = &#039;&#039;;
	if ( ! empty( $parsed_args[&#039;exclude&#039;] ) ) {
		$exlinks = wp_parse_id_list( $parsed_args[&#039;exclude&#039;] );
		if ( count( $exlinks ) ) {
			foreach ( $exlinks as $exlink ) {
				if ( empty( $exclusions ) ) {
					$exclusions = &#039; AND ( link_id &lt;&gt; &#039; . $exlink . &#039; &#039;;
				} else {
					$exclusions .= &#039; AND link_id &lt;&gt; &#039; . $exlink . &#039; &#039;;
				}
			}
		}
	}
	if ( ! empty( $exclusions ) ) {
		$exclusions .= &#039;)&#039;;
	}

	if ( ! empty( $parsed_args[&#039;category_name&#039;] ) ) {
		$parsed_args[&#039;category&#039;] = get_term_by( &#039;name&#039;, $parsed_args[&#039;category_name&#039;], &#039;link_category&#039; );
		if ( $parsed_args[&#039;category&#039;] ) {
			$parsed_args[&#039;category&#039;] = $parsed_args[&#039;category&#039;]-&gt;term_id;
		} else {
			$cache[ $key ] = array();
			wp_cache_set( &#039;get_bookmarks&#039;, $cache, &#039;bookmark&#039; );
			/** This filter is documented in wp-includes/bookmark.php */
			return apply_filters( &#039;get_bookmarks&#039;, array(), $parsed_args );
		}
	}

	$search = &#039;&#039;;
	if ( ! empty( $parsed_args[&#039;search&#039;] ) ) {
		$like   = &#039;%&#039; . $wpdb-&gt;esc_like( $parsed_args[&#039;search&#039;] ) . &#039;%&#039;;
		$search = $wpdb-&gt;prepare( &#039; AND ( (link_url LIKE %s) OR (link_name LIKE %s) OR (link_description LIKE %s) ) &#039;, $like, $like, $like );
	}

	$category_query = &#039;&#039;;
	$join           = &#039;&#039;;
	if ( ! empty( $parsed_args[&#039;category&#039;] ) ) {
		$incategories = wp_parse_id_list( $parsed_args[&#039;category&#039;] );
		if ( count( $incategories ) ) {
			foreach ( $incategories as $incat ) {
				if ( empty( $category_query ) ) {
					$category_query = &#039; AND ( tt.term_id = &#039; . $incat . &#039; &#039;;
				} else {
					$category_query .= &#039; OR tt.term_id = &#039; . $incat . &#039; &#039;;
				}
			}
		}
	}
	if ( ! empty( $category_query ) ) {
		$category_query .= &quot;) AND taxonomy = &#039;link_category&#039;&quot;;
		$join            = &quot; INNER JOIN $wpdb-&gt;term_relationships AS tr ON ($wpdb-&gt;links.link_id = tr.object_id) INNER JOIN $wpdb-&gt;term_taxonomy as tt ON tt.term_taxonomy_id = tr.term_taxonomy_id&quot;;
	}

	if ( $parsed_args[&#039;show_updated&#039;] ) {
		$recently_updated_test = &#039;, IF (DATE_ADD(link_updated, INTERVAL 120 MINUTE) &gt;= NOW(), 1,0) as recently_updated &#039;;
	} else {
		$recently_updated_test = &#039;&#039;;
	}

	$get_updated = ( $parsed_args[&#039;show_updated&#039;] ) ? &#039;, UNIX_TIMESTAMP(link_updated) AS link_updated_f &#039; : &#039;&#039;;

	$orderby = strtolower( $parsed_args[&#039;orderby&#039;] );
	$length  = &#039;&#039;;
	switch ( $orderby ) {
		case &#039;length&#039;:
			$length = &#039;, CHAR_LENGTH(link_name) AS length&#039;;
			break;
		case &#039;rand&#039;:
			$orderby = &#039;rand()&#039;;
			break;
		case &#039;link_id&#039;:
			$orderby = &quot;$wpdb-&gt;links.link_id&quot;;
			break;
		default:
			$orderparams = array();
			$keys        = array( &#039;link_id&#039;, &#039;link_name&#039;, &#039;link_url&#039;, &#039;link_visible&#039;, &#039;link_rating&#039;, &#039;link_owner&#039;, &#039;link_updated&#039;, &#039;link_notes&#039;, &#039;link_description&#039; );
			foreach ( explode( &#039;,&#039;, $orderby ) as $ordparam ) {
				$ordparam = trim( $ordparam );

				if ( in_array( &#039;link_&#039; . $ordparam, $keys, true ) ) {
					$orderparams[] = &#039;link_&#039; . $ordparam;
				} elseif ( in_array( $ordparam, $keys, true ) ) {
					$orderparams[] = $ordparam;
				}
			}
			$orderby = implode( &#039;,&#039;, $orderparams );
	}

	if ( empty( $orderby ) ) {
		$orderby = &#039;link_name&#039;;
	}

	$order = strtoupper( $parsed_args[&#039;order&#039;] );
	if ( &#039;&#039; !== $order &amp;&amp; ! in_array( $order, array( &#039;ASC&#039;, &#039;DESC&#039; ), true ) ) {
		$order = &#039;ASC&#039;;
	}

	$visible = &#039;&#039;;
	if ( $parsed_args[&#039;hide_invisible&#039;] ) {
		$visible = &quot;AND link_visible = &#039;Y&#039;&quot;;
	}

	$query  = &quot;SELECT * $length $recently_updated_test $get_updated FROM $wpdb-&gt;links $join WHERE 1=1 $visible $category_query&quot;;
	$query .= &quot; $exclusions $inclusions $search&quot;;
	$query .= &quot; ORDER BY $orderby $order&quot;;
	if ( -1 !== $parsed_args[&#039;limit&#039;] ) {
		$query .= &#039; LIMIT &#039; . absint( $parsed_args[&#039;limit&#039;] );
	}

	$results = $wpdb-&gt;get_results( $query );

	if ( &#039;rand()&#039; !== $orderby ) {
		$cache[ $key ] = $results;
		wp_cache_set( &#039;get_bookmarks&#039;, $cache, &#039;bookmark&#039; );
	}

	/** This filter is documented in wp-includes/bookmark.php */
	return apply_filters( &#039;get_bookmarks&#039;, $results, $parsed_args );
}

/**
 * Sanitizes all bookmark fields.
 *
 * @since 2.3.0
 *
 * @param stdClass|array $bookmark Bookmark row.
 * @param string         $context  Optional. How to filter the fields. Default &#039;display&#039;.
 * @return stdClass|array Same type as $bookmark but with fields sanitized.
 */
function sanitize_bookmark( $bookmark, $context = &#039;display&#039; ) {
	$fields = array(
		&#039;link_id&#039;,
		&#039;link_url&#039;,
		&#039;link_name&#039;,
		&#039;link_image&#039;,
		&#039;link_target&#039;,
		&#039;link_category&#039;,
		&#039;link_description&#039;,
		&#039;link_visible&#039;,
		&#039;link_owner&#039;,
		&#039;link_rating&#039;,
		&#039;link_updated&#039;,
		&#039;link_rel&#039;,
		&#039;link_notes&#039;,
		&#039;link_rss&#039;,
	);

	if ( is_object( $bookmark ) ) {
		$do_object = true;
		$link_id   = $bookmark-&gt;link_id;
	} else {
		$do_object = false;
		$link_id   = $bookmark[&#039;link_id&#039;];
	}

	foreach ( $fields as $field ) {
		if ( $do_object ) {
			if ( isset( $bookmark-&gt;$field ) ) {
				$bookmark-&gt;$field = sanitize_bookmark_field( $field, $bookmark-&gt;$field, $link_id, $context );
			}
		} else {
			if ( isset( $bookmark[ $field ] ) ) {
				$bookmark[ $field ] = sanitize_bookmark_field( $field, $bookmark[ $field ], $link_id, $context );
			}
		}
	}

	return $bookmark;
}

/**
 * Sanitizes a bookmark field.
 *
 * Sanitizes the bookmark fields based on what the field name is. If the field
 * has a strict value set, then it will be tested for that, else a more generic
 * filtering is applied. After the more strict filter is applied, if the `$context`
 * is &#039;raw&#039; then the value is immediately return.
 *
 * Hooks exist for the more generic cases. With the &#039;edit&#039; context, the {@see &#039;edit_$field&#039;}
 * filter will be called and passed the `$value` and `$bookmark_id` respectively.
 *
 * With the &#039;db&#039; context, the {@see &#039;pre_$field&#039;} filter is called and passed the value.
 * The &#039;display&#039; context is the final context and has the `$field` has the filter name
 * and is passed the `$value`, `$bookmark_id`, and `$context`, respectively.
 *
 * @since 2.3.0
 *
 * @param string $field       The bookmark field.
 * @param mixed  $value       The bookmark field value.
 * @param int    $bookmark_id Bookmark ID.
 * @param string $context     How to filter the field value. Accepts &#039;raw&#039;, &#039;edit&#039;, &#039;db&#039;,
 *                            &#039;display&#039;, &#039;attribute&#039;, or &#039;js&#039;. Default &#039;display&#039;.
 * @return mixed The filtered value.
 */
function sanitize_bookmark_field( $field, $value, $bookmark_id, $context ) {
	$int_fields = array( &#039;link_id&#039;, &#039;link_rating&#039; );
	if ( in_array( $field, $int_fields, true ) ) {
		$value = (int) $value;
	}

	switch ( $field ) {
		case &#039;link_category&#039;: // array( ints )
			$value = array_map( &#039;absint&#039;, (array) $value );
			/*
			 * We return here so that the categories aren&#039;t filtered.
			 * The &#039;link_category&#039; filter is for the name of a link category, not an array of a link&#039;s link categories.
			 */
			return $value;

		case &#039;link_visible&#039;: // bool stored as Y|N
			$value = preg_replace( &#039;/[^YNyn]/&#039;, &#039;&#039;, $value );
			break;
		case &#039;link_target&#039;: // &quot;enum&quot;
			$targets = array( &#039;_top&#039;, &#039;_blank&#039; );
			if ( ! in_array( $value, $targets, true ) ) {
				$value = &#039;&#039;;
			}
			break;
	}

	if ( &#039;raw&#039; === $context ) {
		return $value;
	}

	if ( &#039;edit&#039; === $context ) {
		/** This filter is documented in wp-includes/post.php */
		$value = apply_filters( &quot;edit_{$field}&quot;, $value, $bookmark_id );

		if ( &#039;link_notes&#039; === $field ) {
			$value = esc_html( $value ); // textarea_escaped
		} else {
			$value = esc_attr( $value );
		}
	} elseif ( &#039;db&#039; === $context ) {
		/** This filter is documented in wp-includes/post.php */
		$value = apply_filters( &quot;pre_{$field}&quot;, $value );
	} else {
		/** This filter is documented in wp-includes/post.php */
		$value = apply_filters( &quot;{$field}&quot;, $value, $bookmark_id, $context );

		if ( &#039;attribute&#039; === $context ) {
			$value = esc_attr( $value );
		} elseif ( &#039;js&#039; === $context ) {
			$value = esc_js( $value );
		}
	}

	// Restore the type for integer fields after esc_attr().
	if ( in_array( $field, $int_fields, true ) ) {
		$value = (int) $value;
	}

	return $value;
}

/**
 * Deletes the bookmark cache.
 *
 * @since 2.7.0
 *
 * @param int $bookmark_id Bookmark ID.
 */
function clean_bookmark_cache( $bookmark_id ) {
	wp_cache_delete( $bookmark_id, &#039;bookmark&#039; );
	wp_cache_delete( &#039;get_bookmarks&#039;, &#039;bookmark&#039; );
	clean_object_term_cache( $bookmark_id, &#039;link&#039; );
}
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