Technically Redis may return any unsigned 64 bit integer as a scan
cursor. This presents a problem for PHP in that PHP's integers are
signed. Because of that if a scan cursor is > 2^63 it will overflow and
fail to work properly.
This commit updates our SCAN family of commands to deliver cursors in
their string form.
```php
public function scan(null|int|string $iterator, ...);
```
On initial entry into our SCAN family we convert either a NULL or empty
string cursor to zero, and send the initial scan command.
As Redis replies with cursors we either represent them as a long (if
they are <= ZEND_ULONG_MAX) and as a string if greater. This should
mean the fix is minimally breaking as the following code will still
work:
```php
$it = NULL;
do {
print_r($redis->scan($it));
} while ($it !== 0);
```
The `$it !== 0` still works because the zero cursor will be represented
as an integer. Only absurdly large (> 2^63) values are represented as a
string.
Fixes#2454
Add support for Redis 6 ACLs in the `Redis`, `RedisCluster`, and `RedisArray` classes.
On a related note, it adds a mechanism for users to customize how we generate persistent connection IDs such that they can be grouped in different ways depending on the specific use case required (e.g. it would allow connections to be grouped by username, or by user-defined persistent_id, or both).
PHP 7 removed TSRMLS_CC from zend_throw_exception* routines.
Additionally this commit creates two simple wrapper macros for throwing
Redis or RedisCluster exceptions so we don't duplicate as much code.
Additionally there were a couple of minor compiler warnings printf type
correctness fixed in this commit.
This commit removes support for PHP 5 by getting rid of all of our Zend
compatibility layer methods, as well as any call checking against
PHP_MAJOR_VERSION or ZEND_MODULE_API_NO.
Unit tests are all passing for Redis, RedisCluster, and RedisArray but
this should still be considered a work in progress until more testing
can be done.
Addresses issue #1448
Change type of returning value from `char *` to `zend_string *` for
`ra_extract_key` and `ra_call_extractor` functions.
Store keys as `zend_string *` in RedisArray::mset.
This commit implements UNLINK for Redis, RedisCluster, and RedisArray.
To a client library UNLINK behaves identically to DEL so we can use the
same handlers for both.
michael-grunder