duplicates-filter.php

/**
 * Filter whether to skip parsing duplicate hooks.
 *
 * "Duplicate hooks" are characterized in WordPress core by a preceding DocBlock comment
 * including the phrases "This action is documented in" or "This filter is documented in".
 *
 * Passing a truthy value will skip the parsing of duplicate hooks.
 *
 * @param bool $skip Whether to skip parsing duplicate hooks. Default false.
 */
$skip_duplicates = apply_filters( 'wp_parser_skip_duplicate_hooks', false );

if ( false !== $skip_duplicates ) {
	if ( 0 === strpos( $data['doc']['description'], 'This action is documented in' ) ) {
		return false;
	}

	if ( 0 === strpos( $data['doc']['description'], 'This filter is documented in' ) ) {
		return false;
	}

	if ( '' === $data['doc']['description'] && '' === $data['doc']['long_description'] ) {
		return false;
	}
}