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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 |
|---|---|
| 3446 | /** |
| 3447 | * Filter whether to trigger an error for deprecated functions. |
| 3448 | * |
| 3449 | * `WP_DEBUG` must be true in addition to the filter evaluating to true. |
| 3450 | * |
| 3451 | * @since 4.3.0 |
| 3452 | * |
| 3453 | * @param bool $trigger Whether to trigger the error for deprecated functions. Default true. |
| 3454 | */ |
| 3455 | if ( WP_DEBUG && apply_filters( 'deprecated_constructor_trigger_error', true ) ) { |
| 3456 | if ( function_exists( '__' ) ) { |
| 3457 | trigger_error( sprintf( __( 'The called constructor method for %1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.' ), $class, $version, '<pre>__construct()</pre>' ) ); |
| 3458 | } else { |
| 3459 | trigger_error( sprintf( 'The called constructor method for %1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.', $class, $version, '<pre>__construct()</pre>' ) ); |
| 3460 | } |
| 3461 | } |
| 3462 | |
| 3463 | } |
| 3464 | |