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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 |
|---|---|
| 5067 | |
| 5068 | /** |
| 5069 | * Filters whether to trigger deprecated hook errors. |
| 5070 | * |
| 5071 | * @since 4.6.0 |
| 5072 | * |
| 5073 | * @param bool $trigger Whether to trigger deprecated hook errors. Requires |
| 5074 | * `WP_DEBUG` to be defined true. |
| 5075 | */ |
| 5076 | if ( WP_DEBUG && apply_filters( 'deprecated_hook_trigger_error', true ) ) { |
| 5077 | $message = empty( $message ) ? '' : ' ' . $message; |
| 5078 | |
| 5079 | if ( ! is_null( $replacement ) ) { |
| 5080 | trigger_error( |
| 5081 | sprintf( |
| 5082 | /* translators: 1: WordPress hook name, 2: Version number, 3: Alternative hook name. */ |
| 5083 | __( '%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.' ), |
| 5084 | $hook, |
| 5085 | $version, |