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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 |
---|---|
2277 | /** |
2278 | * Filters the comment form default arguments. |
2279 | * |
2280 | * Use {@see 'comment_form_default_fields'} to filter the comment fields. |
2281 | * |
2282 | * @since 3.0.0 |
2283 | * |
2284 | * @param array $defaults The default comment form arguments. |
2285 | */ |
2286 | $args = wp_parse_args( $args, apply_filters( 'comment_form_defaults', $defaults ) ); |
2287 |
|
2288 | // Ensure that the filtered args contain all required default values. |
2289 | $args = array_merge( $defaults, $args ); |
2290 |
|
2291 | /** |
2292 | * Fires before the comment form. |
2293 | * |
2294 | * @since 3.0.0 |
2295 | */ |