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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 |
|---|---|
| 2135 | * Filters the registration arguments when registering a setting. |
| 2136 | * |
| 2137 | * @since 4.7.0 |
| 2138 | * |
| 2139 | * @param array $args Array of setting registration arguments. |
| 2140 | * @param array $defaults Array of default arguments. |
| 2141 | * @param string $option_group Setting group. |
| 2142 | * @param string $option_name Setting name. |
| 2143 | */ |
| 2144 | $args = apply_filters( 'register_setting_args', $args, $defaults, $option_group, $option_name ); |
| 2145 | $args = wp_parse_args( $args, $defaults ); |
| 2146 | |
| 2147 | // Require an item schema when registering settings with an array type. |
| 2148 | if ( false !== $args['show_in_rest'] && 'array' === $args['type'] && ( ! is_array( $args['show_in_rest'] ) || ! isset( $args['show_in_rest']['schema']['items'] ) ) ) { |
| 2149 | _doing_it_wrong( __FUNCTION__, __( 'When registering an "array" setting to show in the REST API, you must specify the schema for each array item in "show_in_rest.schema.items".' ), '5.4.0' ); |
| 2150 | } |
| 2151 | |
| 2152 | if ( ! is_array( $wp_registered_settings ) ) { |
| 2153 | $wp_registered_settings = array(); |