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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 |
|---|---|
| 3435 | do_action( 'deprecated_file_included', $file, $replacement, $version, $message ); |
| 3436 | |
| 3437 | /** |
| 3438 | * Filter whether to trigger an error for deprecated files. |
| 3439 | * |
| 3440 | * @since 2.5.0 |
| 3441 | * |
| 3442 | * @param bool $trigger Whether to trigger the error for deprecated files. Default true. |
| 3443 | */ |
| 3444 | if ( WP_DEBUG && apply_filters( 'deprecated_file_trigger_error', true ) ) { |
| 3445 | $message = empty( $message ) ? '' : ' ' . $message; |
| 3446 | if ( function_exists( '__' ) ) { |
| 3447 | if ( ! is_null( $replacement ) ) |
| 3448 | trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.'), $file, $version, $replacement ) . $message ); |
| 3449 | else |
| 3450 | trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.'), $file, $version ) . $message ); |
| 3451 | } else { |
| 3452 | if ( ! is_null( $replacement ) ) |
| 3453 | trigger_error( sprintf( '%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.', $file, $version, $replacement ) . $message ); |