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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 |
|---|---|
| 5664 | /** |
| 5665 | * Fires when a deprecated class is called. |
| 5666 | * |
| 5667 | * @since 6.4.0 |
| 5668 | * |
| 5669 | * @param string $class_name The name of the class being instantiated. |
| 5670 | * @param string $replacement The class or function that should have been called. |
| 5671 | * @param string $version The version of WordPress that deprecated the class. |
| 5672 | */ |
| 5673 | do_action( 'deprecated_class_run', $class_name, $replacement, $version ); |
| 5674 | |
| 5675 | /** |
| 5676 | * Filters whether to trigger an error for a deprecated class. |
| 5677 | * |
| 5678 | * @since 6.4.0 |
| 5679 | * |
| 5680 | * @param bool $trigger Whether to trigger an error for a deprecated class. Default true. |
| 5681 | */ |
| 5682 | if ( WP_DEBUG && apply_filters( 'deprecated_class_trigger_error', true ) ) { |