Regex builtins
| Function | Signature | Returns |
|---|---|---|
mb_ereg_match() | (string $pattern, string $subject, string $options = null): bool | bool |
preg_match() | (string $pattern, string $subject, array $matches = []): int | int |
preg_match_all() | (string $pattern, string $subject): int | int |
preg_replace() | (string $pattern, string $replacement, string $subject): string | string |
preg_replace_callback() | (string $pattern, callable $callback, string $subject): string | string |
preg_split() | (string $pattern, string $subject, int $limit = -1, int $flags = 0): array | array |