WP_Token_Map::contains( string $word, string $case_sensitivity = 'case-sensitive' ): bool

442	public function contains( string $word, string $case_sensitivity = 'case-sensitive' ): bool {443		if ( str_contains( $word, "\x00" ) ) {444			return false;445		}446 447		$ignore_case = 'ascii-case-insensitive' === $case_sensitivity;448 449		if ( $this->key_length >= strlen( $word ) ) {450			if ( 0 === strlen( $this->small_words ) ) {451				return false;452			}453 454			$term    = str_pad( $word, $this->key_length + 1, "\x00", STR_PAD_RIGHT );455			$word_at = $ignore_case ? stripos( $this->small_words, $term ) : strpos( $this->small_words, $term );456			if ( false === $word_at ) {457				return false;458			}459 460			return true;461		}462 463		$group_key = substr( $word, 0, $this->key_length );464		$group_at  = $ignore_case ? stripos( $this->groups, $group_key ) : strpos( $this->groups, $group_key );465		if ( false === $group_at ) {466			return false;467		}468		$group        = $this->large_words[ $group_at / ( $this->key_length + 1 ) ];469		$group_length = strlen( $group );470		$slug         = substr( $word, $this->key_length );471		$length       = strlen( $slug );472		$at           = 0;473 474		while ( $at < $group_length ) {475			$token_length   = unpack( 'C', $group[ $at++ ] )[1];476			$token_at       = $at;477			$at            += $token_length;478			$mapping_length = unpack( 'C', $group[ $at++ ] )[1];479			$mapping_at     = $at;480 481			if ( $token_length === $length && 0 === substr_compare( $group, $slug, $token_at, $token_length, $ignore_case ) ) {482				return true;483			}484 485			$at = $mapping_at + $mapping_length;486		}487 488		return false;489	}