I need to delete a key containing some special keys (in my case square brackets):
I do the following, but it does not work:
$this->redis;
$keys = $this->redis->keys("*");
foreach ($keys as $key) {
// keys are in the following format:
// vir3_data_cache[zones_cdc_shifting_series_2013_5][1]
$this->redis->del($key);
// no key was deleted
}
I also tried to quote the key, but without success:
$this->redis;
$keys = $this->redis->keys("*");
foreach ($keys as $key) {
// keys are in the following format:
// vir3_data_cache[zones_cdc_shifting_series_2013_5][1]
$quotedKey = addslashes(addslashes($key));
$this->redis->del($quotedKey);
// no key was deleted
}
Solved. The problem was related to the fact that predis insert automatically a configured prefix at the beginning of each key (in my case 'vir3_data_cache') before doing any operation. But the keys("*")
command does not strip off the prefix from the key.
So I need to do the following in order to make my code work:
$prefix = $this->redis->getOptions()->__get('prefix')->getPrefix();
$keys = $this->redis->keys("*");
$removed = 0;
foreach ($keys as $key) {
if (substr($key, 0, strlen($prefix)) == $prefix) {
$key = substr($key, strlen($prefix));
}
}