解决Redis缓存中偏移处的php反序列化错误

Question

I'm currently using Redis to cache my database results. What I did was to place the db results into an array and serializing the array before adding them as values to my keys in the Redis cache.

$res = $this->db->query($qry);
foreach($res->result() as $row) {
  $curArr[] = $row;
}
$this->redis->set($key, serialize($curArr));

But, whenever I unserialize the cache, it returns an error in the offset.

$cache_result = $this->redis->get($key);
$curArr = unserialize($cache_result);

Message:  unserialize(): Error at offset 8193 of 8701 bytes

When I checked the $cache_result, the length of the string is 8702 and the character at 8194 is ';'. The string snippet for that part is 'Test 3\\";s:7'. There are also various occurrences of that string snippet in $cache_result but the error just appears in 8193.

Your help is much appreciated! Thanks!

Answer 1

Why not do something like this instead : $res = $this->db->query($qry); foreach($res->result() as $row) { $curArr[] = $row;
} $this->redis->set($key, json_encode($curArr)); $res = $this->db->query($qry); foreach($res->result() as $row) { $curArr[] = $row;
} $this->redis->set($key, json_encode($curArr));

While retrieving:

$cache_result = $this->redis->get($key);

$curArr = json_decode($cache_result);