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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 |
|---|---|
| 4021 | |
| 4022 | /** |
| 4023 | * Filters whether to trigger deprecated hook errors. |
| 4024 | * |
| 4025 | * @since 4.6.0 |
| 4026 | * |
| 4027 | * @param bool $trigger Whether to trigger deprecated hook errors. Requires |
| 4028 | * `WP_DEBUG` to be defined true. |
| 4029 | */ |
| 4030 | if ( WP_DEBUG && apply_filters( 'deprecated_hook_trigger_error', true ) ) { |
| 4031 | $message = empty( $message ) ? '' : ' ' . $message; |
| 4032 | if ( ! is_null( $replacement ) ) { |
| 4033 | /* translators: 1: WordPress hook name, 2: version number, 3: alternative hook name */ |
| 4034 | trigger_error( sprintf( __( '%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.' ), $hook, $version, $replacement ) . $message ); |
| 4035 | } else { |
| 4036 | /* translators: 1: WordPress hook name, 2: version number */ |
| 4037 | trigger_error( sprintf( __( '%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.' ), $hook, $version ) . $message ); |
| 4038 | } |
| 4039 | } |