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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 |
|---|---|
| 5737 | |
| 5738 | /** |
| 5739 | * Filters whether to trigger deprecated hook errors. |
| 5740 | * |
| 5741 | * @since 4.6.0 |
| 5742 | * |
| 5743 | * @param bool $trigger Whether to trigger deprecated hook errors. Requires |
| 5744 | * `WP_DEBUG` to be defined true. |
| 5745 | */ |
| 5746 | if ( WP_DEBUG && apply_filters( 'deprecated_hook_trigger_error', true ) ) { |
| 5747 | $message = empty( $message ) ? '' : ' ' . $message; |
| 5748 | |
| 5749 | if ( $replacement ) { |
| 5750 | trigger_error( |
| 5751 | sprintf( |
| 5752 | /* translators: 1: WordPress hook name, 2: Version number, 3: Alternative hook name. */ |
| 5753 | __( 'Hook %1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.' ), |
| 5754 | $hook, |
| 5755 | $version, |