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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 |
|---|---|
| 4828 | |
| 4829 | /** |
| 4830 | * Filters whether to trigger deprecated hook errors. |
| 4831 | * |
| 4832 | * @since 4.6.0 |
| 4833 | * |
| 4834 | * @param bool $trigger Whether to trigger deprecated hook errors. Requires |
| 4835 | * `WP_DEBUG` to be defined true. |
| 4836 | */ |
| 4837 | if ( WP_DEBUG && apply_filters( 'deprecated_hook_trigger_error', true ) ) { |
| 4838 | $message = empty( $message ) ? '' : ' ' . $message; |
| 4839 | if ( ! is_null( $replacement ) ) { |
| 4840 | /* translators: 1: WordPress hook name, 2: Version number, 3: Alternative hook name. */ |
| 4841 | trigger_error( sprintf( __( '%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.' ), $hook, $version, $replacement ) . $message ); |
| 4842 | } else { |
| 4843 | /* translators: 1: WordPress hook name, 2: Version number. */ |
| 4844 | trigger_error( sprintf( __( '%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.' ), $hook, $version ) . $message ); |
| 4845 | } |
| 4846 | } |