src/includes/classes/Core/Utils/Slug.php
public function isValid(string $slug, bool $strict = true): bool
    {
        return (bool) preg_match($strict ? $this::SLUG_STRICT_REGEX_VALID : $this::SLUG_REGEX_VALID, $slug);
    }
public function isValid(string $slug, bool $strict = true): bool
    {
        return (bool) preg_match($strict ? $this::SLUG_STRICT_REGEX_VALID : $this::SLUG_REGEX_VALID, $slug);
    }
Validate slug.

@since 150424 Initial release.

@param string $slug   Slug.
@param bool   $strict Strict?

@return bool True if slug is valid.