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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 |
---|---|
4630 | /** |
4631 | * Fires when a deprecated argument is called. |
4632 | * |
4633 | * @since 3.0.0 |
4634 | * |
4635 | * @param string $function The function that was called. |
4636 | * @param string $message A message regarding the change. |
4637 | * @param string $version The version of WordPress that deprecated the argument used. |
4638 | */ |
4639 | do_action( 'deprecated_argument_run', $function, $message, $version ); |
4640 |
|
4641 | /** |
4642 | * Filters whether to trigger an error for deprecated arguments. |
4643 | * |
4644 | * @since 3.0.0 |
4645 | * |
4646 | * @param bool $trigger Whether to trigger the error for deprecated arguments. Default true. |
4647 | */ |
4648 | if ( WP_DEBUG && apply_filters( 'deprecated_argument_trigger_error', true ) ) { |