WordPress at a glance
filter is not described

pre_comment_content filter-hook . WP 1.5.0

Filters the comment content before it is set.

Usage

add_filter( 'pre_comment_content', 'filter_function_name_4781' );
function filter_function_name_4781( $comment_content ){
	// filter...

	return $comment_content;
}
$comment_content(string)
The comment content.

Changelog

Since 1.5.0 Introduced.

Where the hook is called

wp_filter_comment()
pre_comment_content
wp-includes/comment.php 2097
$commentdata['comment_content'] = apply_filters( 'pre_comment_content', $commentdata['comment_content'] );

Where in WP core the hook is used WordPress

wp-includes/comment.php 1296
remove_filter( 'pre_comment_content', 'wp_filter_post_kses' );
wp-includes/comment.php 1297
add_filter( 'pre_comment_content', 'wp_filter_kses' );
wp-includes/comment.php 3489
remove_filter( 'pre_comment_content', 'wp_filter_post_kses' );
wp-includes/comment.php 3490
add_filter( 'pre_comment_content', 'wp_filter_kses' );
wp-includes/comment.php 126
add_filter( $filter, 'convert_invalid_entities' );
wp-includes/comment.php 127
add_filter( $filter, 'balanceTags', 50 );
wp-includes/comment.php 252
add_filter( 'pre_comment_content', 'wp_rel_ugc', 15 );
wp-includes/comment.php 2087
add_filter( 'pre_comment_content', 'wp_filter_post_kses' );
wp-includes/comment.php 2089
add_filter( 'pre_comment_content', 'wp_filter_kses' );
wp-includes/comment.php 2115
remove_filter( 'pre_comment_content', 'wp_filter_post_kses' );
wp-includes/comment.php 2116
remove_filter( 'pre_comment_content', 'wp_filter_kses' );