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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 |
|---|---|
| 5776 | /** |
| 5777 | * Fires when a deprecated argument is called. |
| 5778 | * |
| 5779 | * @since 3.0.0 |
| 5780 | * |
| 5781 | * @param string $function_name The function that was called. |
| 5782 | * @param string $message A message regarding the change. |
| 5783 | * @param string $version The version of WordPress that deprecated the argument used. |
| 5784 | */ |
| 5785 | do_action( 'deprecated_argument_run', $function_name, $message, $version ); |
| 5786 | |
| 5787 | /** |
| 5788 | * Filters whether to trigger an error for deprecated arguments. |
| 5789 | * |
| 5790 | * @since 3.0.0 |
| 5791 | * |
| 5792 | * @param bool $trigger Whether to trigger the error for deprecated arguments. Default true. |
| 5793 | */ |
| 5794 | if ( WP_DEBUG && apply_filters( 'deprecated_argument_trigger_error', true ) ) { |