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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 |
|---|---|
| 2829 | $suffix++; |
| 2830 | } while ( $post_name_check ); |
| 2831 | $slug = $alt_post_name; |
| 2832 | } |
| 2833 | } else { |
| 2834 | // Post slugs must be unique across all posts. |
| 2835 | $check_sql = "SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND post_type = %s AND ID != %d LIMIT 1"; |
| 2836 | $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $slug, $post_type, $post_ID ) ); |
| 2837 | |
| 2838 | if ( $post_name_check || in_array( $slug, $feeds ) || apply_filters( 'wp_unique_post_slug_is_bad_flat_slug', false, $slug, $post_type ) ) { |
| 2839 | $suffix = 2; |
| 2840 | do { |
| 2841 | $alt_post_name = substr( $slug, 0, 200 - ( strlen( $suffix ) + 1 ) ) . "-$suffix"; |
| 2842 | $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $alt_post_name, $post_type, $post_ID ) ); |
| 2843 | $suffix++; |
| 2844 | } while ( $post_name_check ); |
| 2845 | $slug = $alt_post_name; |
| 2846 | } |
| 2847 | } |