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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 |
|---|---|
| 3832 | /** |
| 3833 | * Filters whether to trigger an error for deprecated functions. |
| 3834 | * |
| 3835 | * `WP_DEBUG` must be true in addition to the filter evaluating to true. |
| 3836 | * |
| 3837 | * @since 4.3.0 |
| 3838 | * |
| 3839 | * @param bool $trigger Whether to trigger the error for deprecated functions. Default true. |
| 3840 | */ |
| 3841 | if ( WP_DEBUG && apply_filters( 'deprecated_constructor_trigger_error', true ) ) { |
| 3842 | if ( function_exists( '__' ) ) { |
| 3843 | if ( ! empty( $parent_class ) ) { |
| 3844 | /* translators: 1: PHP class name, 2: PHP parent class name, 3: version number, 4: __construct() method */ |
| 3845 | trigger_error( sprintf( __( 'The called constructor method for %1$s in %2$s is <strong>deprecated</strong> since version %3$s! Use %4$s instead.' ), |
| 3846 | $class, $parent_class, $version, '<pre>__construct()</pre>' ) ); |
| 3847 | } else { |
| 3848 | /* translators: 1: PHP class name, 2: version number, 3: __construct() method */ |
| 3849 | trigger_error( sprintf( __( 'The called constructor method for %1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.' ), |
| 3850 | $class, $version, '<pre>__construct()</pre>' ) ); |