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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
---|---|
2525 | if ( in_array( $post_status, array( 'draft', 'pending', 'auto-draft' ) ) ) |
2526 | return $slug; |
2527 |
|
2528 | global $wpdb, $wp_rewrite; |
2529 |
|
2530 | $feeds = $wp_rewrite->feeds; |
2531 | if ( ! is_array( $feeds ) ) |
2532 | $feeds = array(); |
2533 |
|
2534 | $hierarchical_post_types = apply_filters( 'hierarchical_post_types', array( 'page' ) ); |
2535 | if ( 'attachment' == $post_type ) { |
2536 | // Attachment slugs must be unique across all types. |
2537 | $check_sql = "SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND ID != %d LIMIT 1"; |
2538 | $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $slug, $post_ID ) ); |
2539 |
|
2540 | if ( $post_name_check || in_array( $slug, $feeds ) ) { |
2541 | $suffix = 2; |
2542 | do { |
2543 | $alt_post_name = substr ($slug, 0, 200 - ( strlen( $suffix ) + 1 ) ) . "-$suffix"; |