c

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.

warning

Deprecated: Use Locale\bytes() instead.

namespace HH\Lib\Locale;

function c(): Locale;

This function is being removed as:

• there is often confusion between "the C locale" and "the current libc locale"
• HHVM implements optimizations which are a visible behavior change; for example, strlen("foo\0bar") is 7 in HHVM, but 3 in libc.

Returns

• Locale