WP_HTML_Decoder::attribute_starts_with( string $haystack, string $search_text, string $case_sensitivity = 'case-sensitive' ): bool

34	public static function attribute_starts_with( $haystack, $search_text, $case_sensitivity = 'case-sensitive' ): bool {35		$search_length = strlen( $search_text );36		$loose_case    = 'ascii-case-insensitive' === $case_sensitivity;37		$haystack_end  = strlen( $haystack );38		$search_at     = 0;39		$haystack_at   = 0;40 41		while ( $search_at < $search_length && $haystack_at < $haystack_end ) {42			$chars_match = $loose_case43				? strtolower( $haystack[ $haystack_at ] ) === strtolower( $search_text[ $search_at ] )44				: $haystack[ $haystack_at ] === $search_text[ $search_at ];45 46			$is_introducer = '&' === $haystack[ $haystack_at ];47			$next_chunk    = $is_introducer48				? self::read_character_reference( 'attribute', $haystack, $haystack_at, $token_length )49				: null;50 51			// If there's no character reference and the characters don't match, the match fails.52			if ( null === $next_chunk && ! $chars_match ) {53				return false;54			}55 56			// If there's no character reference but the character do match, then it could still match.57			if ( null === $next_chunk && $chars_match ) {58				++$haystack_at;59				++$search_at;60				continue;61			}62 63			// If there is a character reference, then the decoded value must exactly match what follows in the search string.64			if ( 0 !== substr_compare( $search_text, $next_chunk, $search_at, strlen( $next_chunk ), $loose_case ) ) {65				return false;66			}67 68			// The character reference matched, so continue checking.69			$haystack_at += $token_length;70			$search_at   += strlen( $next_chunk );71		}72 73		return true;74	}