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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 |
|---|---|
| 3899 | * Fires when a deprecated constructor is called. |
| 3900 | * |
| 3901 | * @since 4.3.0 |
| 3902 | * @since 4.5.0 Added the `$parent_class` parameter. |
| 3903 | * |
| 3904 | * @param string $class The class containing the deprecated constructor. |
| 3905 | * @param string $version The version of WordPress that deprecated the function. |
| 3906 | * @param string $parent_class The parent class calling the deprecated constructor. |
| 3907 | */ |
| 3908 | do_action( 'deprecated_constructor_run', $class, $version, $parent_class ); |
| 3909 | |
| 3910 | /** |
| 3911 | * Filters whether to trigger an error for deprecated functions. |
| 3912 | * |
| 3913 | * `WP_DEBUG` must be true in addition to the filter evaluating to true. |
| 3914 | * |
| 3915 | * @since 4.3.0 |
| 3916 | * |
| 3917 | * @param bool $trigger Whether to trigger the error for deprecated functions. Default true. |