hphp/hack/manual/hsl/Functions/HH.Lib.Str/compare_l.md
:::info[Note] This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information. :::
Returns < 0 if $string1 is less than $string2, > 0 if $string1 is
greater than $string2, and 0 if they are equal
namespace HH\Lib\Str;
function compare_l(
\HH\Lib\Locale\Locale $locale,
string $string1,
string $string2,
): int;
For a case-insensitive comparison, see Str\compare_ci_l().
Locale-specific collation rules will be followed, and strings will be normalized in encodings that support multiple representations of the same characters, such as UTF8.
\HH\Lib\Locale\Locale $localestring $string1string $string2int