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filter is not described

pre_comment_author_email filter-hook . WP 1.5.0

Filters the comment author's email cookie before it is set.

When this filter hook is evaluated in wp_filter_comment(), the comment author's email string is passed.

Usage

add_filter( 'pre_comment_author_email', 'filter_function_name_6730' );
function filter_function_name_6730( $author_email_cookie ){
	// filter...

	return $author_email_cookie;
}
$author_email_cookie(string)
The comment author email cookie.

Where the hook is called

sanitize_comment_cookies()
pre_comment_author_email
wp_filter_comment()
pre_comment_author_email
wp-includes/comment.php 587
$comment_author_email = apply_filters( 'pre_comment_author_email', $_COOKIE['comment_author_email_' . COOKIEHASH] );
wp-includes/comment.php 1863
$commentdata['comment_author_email'] = apply_filters( 'pre_comment_author_email', $commentdata['comment_author_email'] );

Where the hook is used (in WP core)

wp-includes/default-filters.php 47
add_filter( $filter, 'trim' );
wp-includes/default-filters.php 48
add_filter( $filter, 'sanitize_email' );
wp-includes/default-filters.php 49
add_filter( $filter, 'wp_filter_kses' );