WordPress at a glance
function is not described

wp_pre_kses_less_than() WP 2.3.0

Convert lone less than signs.

KSES already converts lone greater than signs.

No Hooks.

Return

String. Converted text.

Usage

wp_pre_kses_less_than( $text );
$text(string) (required)
Text to be converted.

Code of wp pre kses less than: wp-includes/formatting.php WP 5.2.2

<?php
function wp_pre_kses_less_than( $text ) {
	return preg_replace_callback( '%<[^>]*?((?=<)|>|$)%', 'wp_pre_kses_less_than_callback', $text );
}