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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 |
|---|---|
| 1947 | } |
| 1948 | |
| 1949 | /** |
| 1950 | * Filters the comment author's browser user agent before it is set. |
| 1951 | * |
| 1952 | * @since 1.5.0 |
| 1953 | * |
| 1954 | * @param string $comment_agent The comment author's browser user agent. |
| 1955 | */ |
| 1956 | $commentdata['comment_agent'] = apply_filters( 'pre_comment_user_agent', ( isset( $commentdata['comment_agent'] ) ? $commentdata['comment_agent'] : '' ) ); |
| 1957 | /** This filter is documented in wp-includes/comment.php */ |
| 1958 | $commentdata['comment_author'] = apply_filters( 'pre_comment_author_name', $commentdata['comment_author'] ); |
| 1959 | /** |
| 1960 | * Filters the comment content before it is set. |
| 1961 | * |
| 1962 | * @since 1.5.0 |
| 1963 | * |
| 1964 | * @param string $comment_content The comment content. |
| 1965 | */ |