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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 |
|---|---|
| 3741 | * Fires when a deprecated constructor is called. |
| 3742 | * |
| 3743 | * @since 4.3.0 |
| 3744 | * @since 4.5.0 Added the `$parent_class` parameter. |
| 3745 | * |
| 3746 | * @param string $class The class containing the deprecated constructor. |
| 3747 | * @param string $version The version of WordPress that deprecated the function. |
| 3748 | * @param string $parent_class The parent class calling the deprecated constructor. |
| 3749 | */ |
| 3750 | do_action( 'deprecated_constructor_run', $class, $version, $parent_class ); |
| 3751 | |
| 3752 | /** |
| 3753 | * Filters whether to trigger an error for deprecated functions. |
| 3754 | * |
| 3755 | * `WP_DEBUG` must be true in addition to the filter evaluating to true. |
| 3756 | * |
| 3757 | * @since 4.3.0 |
| 3758 | * |
| 3759 | * @param bool $trigger Whether to trigger the error for deprecated functions. Default true. |