wp-includes/deprecated.php:2522Check if Term exists.
$termint|string$taxonomystringoptional''$parentintoptional0mixedfunction is_term( $term, $taxonomy = '', $parent = 0 ) { _deprecated_function( __FUNCTION__, '3.0.0', 'term_exists()' ); return term_exists( $term, $taxonomy, $parent );}Introduced in 2.3.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/deprecated.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.