public function clear($prefix = '')
{
$prefix = $this->getNamespace() . $prefix . '*';
$it = null;
self::$cache->setOption(\Redis::OPT_SCAN, \Redis::SCAN_RETRY);
while ($keys = self::$cache->scan($it, $prefix)) {
self::$cache->delete($keys);
}
return true;
}
public function testScan()
{
if (version_compare($this->version, "2.8.0", "lt")) {
$this->markTestSkipped();
return;
}
// Key count
$i_key_count = $this->get_keyspace_count('db0');
// Have scan retry
$this->redis->setOption(Redis::OPT_SCAN, Redis::SCAN_RETRY);
// Scan them all
$it = NULL;
while ($arr_keys = $this->redis->scan($it)) {
$i_key_count -= count($arr_keys);
}
// Should have iterated all keys
$this->assertEquals(0, $i_key_count);
// Unique keys, for pattern matching
$str_uniq = uniqid() . '-' . uniqid();
for ($i = 0; $i < 10; $i++) {
$this->redis->set($str_uniq . "::{$i}", "bar::{$i}");
}
// Scan just these keys using a pattern match
$it = NULL;
while ($arr_keys = $this->redis->scan($it, "*{$str_uniq}*")) {
$i -= count($arr_keys);
}
$this->assertEquals(0, $i);
}
/**
* Returns the resources found via the $data parameter
* HOWEVER, it DOES allow wildcard searches
*
* @param $data
* @param string $fields
*
* @return Collection|Model|null
*/
public function searchByWildcard($data, $fields = 'all')
{
$fields = $this->getFieldsForGet($fields);
/**
* If $this->indexes looks like ['id', 'email', 'password']
* and $data looks like ['name' => '*****@*****.**']
* then $indexes will end up looking something like: **_kenyon.jh@gmail.com_*
*/
$indexes = array_fill_keys($this->indexes, '*');
foreach ($data as $index => $value) {
$indexes[$index] = str_replace(' ', '+', strtolower($value));
}
$indexes = $this->hashName . ':*' . implode('_', $indexes);
$foundKeys = [];
/**
* Redis only shows X entries at a time, and then gives the
* cursor position of the next X. This is to prevent blocking
* queries since it is single-threaded
*/
do {
$cursorIndex = !isset($redisScan) ? 0 : $redisScan[0];
$redisScan = $this->redis->scan($cursorIndex, 'match', $indexes, 'count', 500);
$foundKeys = array_merge($redisScan[1], $foundKeys);
} while ($redisScan[0] != 0);
switch (count($foundKeys)) {
case 0:
// If no keys were found, return NULL
return NULL;
case 1:
// If only 1 match was found, return an instance of it
$key = $this->redis->get($foundKeys[0]);
return $this->get($key, $fields);
default:
// If multiple matches were found, return a collection of all of them
$results = [];
foreach ($foundKeys as $key) {
$key = $this->redis->get($key);
$results[] = $this->get($key, $fields);
}
return new Collection($results);
}
}
/**
* @param int &$it
* @param string $pattern
* @param int $count
* @return array|FALSE
*/
public function scan(&$it, $pattern = NULL, $count = NULL)
{
return parent::scan($it, $pattern, $count);
}
echo "\nCopying data from Redis({$r_host}:{$r_port}[{$r_db}]) to SSDB({$s_host}, {$s_port})...\n";
if (scan_command_available()) {
echo "Using SCAN.\n";
} else {
echo "Using KEYS.\n";
}
$count = 0;
$total = 0;
$entries = 0;
echo "==============\n";
// check if phpredis and redis-server supports SCAN
if (scan_command_available()) {
$total = $redis->dbsize();
$it = NULL;
$redis->setOption(Redis::OPT_SCAN, Redis::SCAN_RETRY);
while ($keys = $redis->scan($it)) {
copy_keys($keys);
}
} else {
$keys = $redis->keys('*');
$total = count($keys);
copy_keys($keys);
}
echo date('Y-m-d H:i:s') . " {$total} keys, {$entries} entries copied.\n";
echo "==============\n";
echo "Done.\n";
echo "\n";
function copy_keys($keys)
{
global $redis, $ssdb, $count, $total, $entries;
foreach ($keys as $key) {
$pip->incr('b');
$pip->del('a');
$ret = $pip->exec();
var_dump($ret);
exit;
$ret = $redis->incr('test-num2')->incr('test-num2')->exec();
exit('aa' . $redis->get('test-num2'));
$redis->multi(Redis::PIPELINE);
for ($i = 0; $i < 10000; $i++) {
$redis->incr('test-num')->include('test-num2');
}
$redis->exec();
exit;
$it = null;
$redis->setOption(Redis::OPT_SCAN, Redis::SCAN_RETRY);
while ($ret = $redis->scan($it, 'test*', 3)) {
foreach ($ret as $item) {
echo $item . PHP_EOL;
}
}
exit;
$key1 = 'key-list1';
$key2 = 'key-list2';
$timeout = 0;
try {
while ($item = $redis->brPop($key1, $key2, $timeout)) {
var_dump($item);
/*
array(2) {
[0]=> string(9) "key-list1" list name
[1]=> string(1) "a" item value
* 如果下一页游标cursor不为0的话，也即没有到底的话：
* 1.如果匹配到了，则返回匹配到的内容
* 2.如果没有匹配到，会继续接着往下一页寻找,函数不会有返回值
* 直到游标返回0，结束查找
*
* 总结:
*
* 最大的区别就是php中的scan如果在下一页没有匹配到内容，则不会返回
* 直到找到匹配到的内容，才会返回值。
* 而redis服务器的scan每次都会根据你设定好的count值返回这次寻找的结果.
*/
$redis = new Redis();
$redis->connect('127.0.0.1', '6381', 20);
$redis->setOption(Redis::OPT_SCAN, Redis::SCAN_RETRY);
$match = 'the:key:you:wang:*';
$count = 10000;
// 1
$result = $redis - scan($it, $match, $count);
echo $it;
var_dump($result);
exit;
// 2
while ($keys = $redis->scan($it, $match, $count)) {
print_r($keys);
// get the keys,so can do what you want
// mostly use the scan result to del keys
// because the redis CMD "keys" is terrible.
// on "keys" cmd could hang on the whole redis server...
// so replace the "keys" cmd with the "scan"
$redis->del($keys);
}
/**
* {@inheritDoc}
*
* @link https://github.com/phpredis/phpredis#scan
*/
protected function _getAllKeys()
{
$iterator = null;
$keys = [];
// Retry when we get no keys back
$this->_connection->setOption(\Redis::OPT_SCAN, \Redis::SCAN_RETRY);
while ($scanned_keys = $this->_connection->scan($iterator)) {
$keys += $scanned_keys;
}
return $keys;
}
