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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 |
|---|---|
| 3172 | /** |
| 3173 | * Fires when a deprecated argument is called. |
| 3174 | * |
| 3175 | * @since 3.0.0 |
| 3176 | * |
| 3177 | * @param string $function The function that was called. |
| 3178 | * @param string $message A message regarding the change. |
| 3179 | * @param string $version The version of WordPress that deprecated the argument used. |
| 3180 | */ |
| 3181 | do_action( 'deprecated_argument_run', $function, $message, $version ); |
| 3182 | |
| 3183 | /** |
| 3184 | * Filter whether to trigger an error for deprecated arguments. |
| 3185 | * |
| 3186 | * @since 3.0.0 |
| 3187 | * |
| 3188 | * @param bool $trigger Whether to trigger the error for deprecated arguments. Default true. |
| 3189 | */ |
| 3190 | if ( WP_DEBUG && apply_filters( 'deprecated_argument_trigger_error', true ) ) { |