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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 |
|---|---|
| 3697 | * Fires when a deprecated constructor is called. |
| 3698 | * |
| 3699 | * @since 4.3.0 |
| 3700 | * @since 4.5.0 Added the `$parent_class` parameter. |
| 3701 | * |
| 3702 | * @param string $class The class containing the deprecated constructor. |
| 3703 | * @param string $version The version of WordPress that deprecated the function. |
| 3704 | * @param string $parent_class The parent class calling the deprecated constructor. |
| 3705 | */ |
| 3706 | do_action( 'deprecated_constructor_run', $class, $version, $parent_class ); |
| 3707 | |
| 3708 | /** |
| 3709 | * Filter whether to trigger an error for deprecated functions. |
| 3710 | * |
| 3711 | * `WP_DEBUG` must be true in addition to the filter evaluating to true. |
| 3712 | * |
| 3713 | * @since 4.3.0 |
| 3714 | * |
| 3715 | * @param bool $trigger Whether to trigger the error for deprecated functions. Default true. |