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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 |
|---|---|
| 66 | function allow_subdirectory_install() { |
| 67 | global $wpdb; |
| 68 | /** |
| 69 | * Filter whether to enable the subdirectory install feature in Multisite. |
| 70 | * |
| 71 | * @since 3.0.0 |
| 72 | * |
| 73 | * @param bool true Whether to enable the subdirectory install feature in Multisite. Default is false. |
| 74 | */ |
| 75 | if ( apply_filters( 'allow_subdirectory_install', false ) ) |
| 76 | return true; |
| 77 | |
| 78 | if ( defined( 'ALLOW_SUBDIRECTORY_INSTALL' ) && ALLOW_SUBDIRECTORY_INSTALL ) |
| 79 | return true; |
| 80 | |
| 81 | $post = $wpdb->get_row( "SELECT ID FROM $wpdb->posts WHERE post_date < DATE_SUB(NOW(), INTERVAL 1 MONTH) AND post_status = 'publish'" ); |
| 82 | if ( empty( $post ) ) |
| 83 | return true; |
| 84 | |