*
* @param int $post_id
*
* @return int|bool false on error
*/
function wp_get_post_parent_id( $post_ID ) {
$post = get_post( $post_ID );
if ( !$post || is_wp_error( $post ) )
return false;
return (int) $post->post_parent;
}
/**
* Checks the given subset of the post hierarchy for hierarchy loops.
* Prevents loops from forming and breaks those that it finds.
*
* Attached to the wp_insert_post_parent filter.
*
* @since 3.1.0
* @uses wp_find_hierarchy_loop()
*
* @param int $post_parent ID of the parent for the post we're checking.
* @parem int $post_ID ID of the post we're checking.
*
* @return int The new post_parent for the post.
*/
function wp_check_post_hierarchy_for_loops( $post_parent, $post_ID ) {
// Nothing fancy here - bail
if ( !$post_parent )
return 0;
// New post can't cause a loop
if ( empty( $post_ID ) )
return $post_parent;
// Can't be its own parent
if ( $post_parent == $post_ID )
return 0;
// Now look for larger loops
if ( !$loop = wp_find_hierarchy_loop( 'wp_get_post_parent_id', $post_ID, $post_parent ) )
return $post_parent; // No loop
// Setting $post_parent to the given value causes a loop
if ( isset( $loop[$post_ID] ) )
return 0;
// There's a loop, but it doesn't contain $post_ID. Break the loop.
foreach ( array_keys( $loop ) as $loop_member )
wp_update_post( array( 'ID' => $loop_member, 'post_parent' => 0 ) );
return $post_parent;
}
/**
* Returns an array of post format slugs to their translated and pretty display versions
*
* @since 3.1.0
*
* @return array The array of translations
*/
function get_post_format_strings() {
$strings = array(
'standard' => _x( 'Standard', 'Post format' ), // Special case. any value that evals to false will be considered standard
'aside' => _x( 'Aside', 'Post format' ),
'chat' => _x( 'Chat', 'Post format' ),
'gallery' => _x( 'Gallery', 'Post format' ),
'link' => _x( 'Link', 'Post format' ),
'image' => _x( 'Image', 'Post format' ),
'quote' => _x( 'Quote', 'Post format' ),
'status' => _x( 'Status', 'Post format' ),
'video' => _x( 'Video', 'Post format' ),
'audio' => _x( 'Audio', 'Post format' ),
);
return $strings;
}
/**
* Retrieves an array of post format slugs.
*
* @since 3.1.0
*
* @return array The array of post format slugs.
*/
function get_post_format_slugs() {
$slugs = array_keys( get_post_format_strings() );
return array_combine( $slugs, $slugs );
}
/**
* Returns a pretty, translated version of a post format slug
*
* @since 3.1.0
*
* @param string $slug A post format slug
* @return string The translated post format name
*/
function get_post_format_string( $slug ) {
$strings = get_post_format_strings();
if ( !$slug )
return $strings['standard'];
else
return ( isset( $strings[$slug] ) ) ? $strings[$slug] : '';
}
/**
* Sets a post thumbnail.
*
* @since 3.1.0
*
* @param int|object $post Post ID or object where thumbnail should be attached.
* @param int $thumbnail_id Thumbnail to attach.
* @return bool True on success, false on failure.
*/
function set_post_thumbnail( $post, $thumbnail_id ) {
$post = get_post( $post );
$thumbnail_id = absint( $thumbnail_id );
if ( $post && $thumbnail_id && get_post( $thumbnail_id ) ) {
$thumbnail_html = wp_get_attachment_image( $thumbnail_id, 'thumbnail' );
if ( ! empty( $thumbnail_html ) ) {
update_post_meta( $post->ID, '_thumbnail_id', $thumbnail_id );
return true;
}
}
return false;
}
/**
* Removes a post thumbnail.
*
* @since 3.3.0
*
* @param int|object $post Post ID or object where thumbnail should be removed from.
* @return bool True on success, false on failure.
*/
function delete_post_thumbnail( $post ) {
$post = get_post( $post );
if ( $post )
return delete_post_meta( $post->ID, '_thumbnail_id' );
return false;
}
/**
* Returns a link to a post format index.
*
* @since 3.1.0
*
* @param string $format Post format
* @return string Link
*/
function get_post_format_link( $format ) {
$term = get_term_by('slug', 'post-format-' . $format, 'post_format' );
if ( ! $term || is_wp_error( $term ) )
return false;
return get_term_link( $term );
}
/**
* Filters the request to allow for the format prefix.
*
* @access private
* @since 3.1.0
*/
function _post_format_request( $qvs ) {
if ( ! isset( $qvs['post_format'] ) )
return $qvs;
$slugs = get_post_format_slugs();
if ( isset( $slugs[ $qvs['post_format'] ] ) )
$qvs['post_format'] = 'post-format-' . $slugs[ $qvs['post_format'] ];
$tax = get_taxonomy( 'post_format' );
if ( ! is_admin() )
$qvs['post_type'] = $tax->object_type;
return $qvs;
}
add_filter( 'request', '_post_format_request' );
/**
* Filters the post format term link to remove the format prefix.
*
* @access private
* @since 3.1.0
*/
function _post_format_link( $link, $term, $taxonomy ) {
global $wp_rewrite;
if ( 'post_format' != $taxonomy )
return $link;
if ( $wp_rewrite->get_extra_permastruct( $taxonomy ) ) {
return str_replace( "/{$term->slug}", '/' . str_replace( 'post-format-', '', $term->slug ), $link );
} else {
$link = remove_query_arg( 'post_format', $link );
return add_query_arg( 'post_format', str_replace( 'post-format-', '', $term->slug ), $link );
}
}
add_filter( 'term_link', '_post_format_link', 10, 3 );
/**
* Remove the post format prefix from the name property of the term object created by get_term().
*
* @access private
* @since 3.1.0
*/
function _post_format_get_term( $term ) {
if ( isset( $term->slug ) ) {
$term->name = get_post_format_string( str_replace( 'post-format-', '', $term->slug ) );
}
return $term;
}
add_filter( 'get_post_format', '_post_format_get_term' );
/**
* Remove the post format prefix from the name property of the term objects created by get_terms().
*
* @access private
* @since 3.1.0
*/
function _post_format_get_terms( $terms, $taxonomies, $args ) {
if ( in_array( 'post_format', (array) $taxonomies ) ) {
if ( isset( $args['fields'] ) && 'names' == $args['fields'] ) {
foreach( $terms as $order => $name ) {
$terms[$order] = get_post_format_string( str_replace( 'post-format-', '', $name ) );
}
} else {
foreach ( (array) $terms as $order => $term ) {
if ( isset( $term->taxonomy ) && 'post_format' == $term->taxonomy ) {
$terms[$order]->name = get_post_format_string( str_replace( 'post-format-', '', $term->slug ) );
}
}
}
}
return $terms;
}
add_filter( 'get_terms', '_post_format_get_terms', 10, 3 );
/**
* Remove the post format prefix from the name property of the term objects created by wp_get_object_terms().
*
* @access private
* @since 3.1.0
*/
function _post_format_wp_get_object_terms( $terms ) {
foreach ( (array) $terms as $order => $term ) {
if ( isset( $term->taxonomy ) && 'post_format' == $term->taxonomy ) {
$terms[$order]->name = get_post_format_string( str_replace( 'post-format-', '', $term->slug ) );
}
}
return $terms;
}
add_filter( 'wp_get_object_terms', '_post_format_wp_get_object_terms' );
/**
* Update the custom taxonomies' term counts when a post's status is changed. For example, default posts term counts (for custom taxonomies) don't include private / draft posts.
*
* @access private
* @param string $new_status
* @param string $old_status
* @param object $post
* @since 3.3.0
*/
function _update_term_count_on_transition_post_status( $new_status, $old_status, $post ) {
// Update counts for the post's terms.
foreach ( (array) get_object_taxonomies( $post->post_type ) as $taxonomy ) {
$tt_ids = wp_get_object_terms( $post->ID, $taxonomy, array( 'fields' => 'tt_ids' ) );
wp_update_term_count( $tt_ids, $taxonomy );
}
}
?>
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