wp-includes/formatting.php:2543Balances tags if forced to, or if the 'use_balanceTags' option is set to true.
$textstring$forcebooloptionalfalsestringfunction balanceTags( $text, $force = false ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid if ( $force || (int) get_option( 'use_balanceTags' ) === 1 ) { return force_balance_tags( $text ); } else { return $text; }}Introduced in 0.71. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/formatting.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.