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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 |
|---|---|
| 4881 | do_action( 'deprecated_file_included', $file, $replacement, $version, $message ); |
| 4882 | |
| 4883 | /** |
| 4884 | * Filters whether to trigger an error for deprecated files. |
| 4885 | * |
| 4886 | * @since 2.5.0 |
| 4887 | * |
| 4888 | * @param bool $trigger Whether to trigger the error for deprecated files. Default true. |
| 4889 | */ |
| 4890 | if ( WP_DEBUG && apply_filters( 'deprecated_file_trigger_error', true ) ) { |
| 4891 | $message = empty( $message ) ? '' : ' ' . $message; |
| 4892 | |
| 4893 | if ( function_exists( '__' ) ) { |
| 4894 | if ( ! is_null( $replacement ) ) { |
| 4895 | trigger_error( |
| 4896 | sprintf( |
| 4897 | /* translators: 1: PHP file name, 2: Version number, 3: Alternative file name. */ |
| 4898 | __( '%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.' ), |
| 4899 | $file, |