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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 |
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3274 |
|
3275 | /** |
3276 | * Filters whether an empty comment should be allowed. |
3277 | * |
3278 | * @since 5.1.0 |
3279 | * |
3280 | * @param bool $allow_empty_comment Whether to allow empty comments. Default false. |
3281 | * @param array $commentdata Array of comment data to be sent to wp_insert_comment(). |
3282 | */ |
3283 | $allow_empty_comment = apply_filters( 'allow_empty_comment', false, $commentdata ); |
3284 | if ( '' === $comment_content && ! $allow_empty_comment ) { |
3285 | return new WP_Error( 'require_valid_comment', __( '<strong>ERROR</strong>: please type a comment.' ), 200 ); |
3286 | } |
3287 |
|
3288 | $check_max_lengths = wp_check_comment_data_max_lengths( $commentdata ); |
3289 | if ( is_wp_error( $check_max_lengths ) ) { |
3290 | return $check_max_lengths; |
3291 | } |
3292 |
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