This article brings you usage examples of the PHP frequency limit class. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.
For example:
Realize a single IP limit once every 60 seconds
A single keyword, such as a mobile phone number, is limited once every 60 seconds, and 10 times every 3600 seconds
<?php
class Sina_Mail_WebAntispam {
const PREFIX_WHITELIST = 'w:';
const PREFIX_KILL = 'k:';
const PREFIX_VERIFYCODE = 'c:';
const PREFIX_VERIFIED = 'v:';
const STATUS_UPDATE = '[U]';
private $mc = null;
private $config = null;
private $whitelist = array();
private $keyPrefix = '';
private $intervals = array();
private $updates = array();
private $status = array();
public function __construct($mc, $config) {
$this->mc = $mc;
$this->config = $config;
if (isset($this->config->prefix)) {
$this->keyPrefix = $this->config->prefix;
}
if (isset($this->config->whitelistKey)) {
$wls = $this->mc->get($this->config->whitelistKey);
if (!empty($wls)) {
$this->whitelist = & $wls;
}
}
}
public function setWhitelist(&$whitelist) {
$this->whitelist = & $whitelist;
}
/*验证限制规则*/
public function check($ip = null, $key = null) {
if (!$ip && !$key) {
return false;
}
if ($key) {
if (!is_array($key)) {
$keys = array($key);
} else {
$keys = $key;
}
}
// first filter by whitelist
if (!empty($this->whitelist)) {
if ($ip && $this->filterByWhitelist($ip, 'ip')) {
$this->status[self::PREFIX_WHITELIST . $ip] = 1;
return true;
}
if ($keys) {
foreach ($keys as $key) {
if ($this->filterByWhitelist($key, 'key')) {
$this->status[self::PREFIX_WHITELIST . $key] = 1;
return true;
}
}
}
}
if ($ip) {
$ip = $this->keyPrefix . $ip;
}
// second, check verified ok
if (!empty($this->config->verified)) {
if ($ip && $this->mc->get(self::PREFIX_VERIFIED . $ip)) {
$this->status[self::PREFIX_VERIFIED . $ip] = 1;
return true;
}
if ($keys) {
foreach ($keys as $key) {
$verifiedKey = self::PREFIX_VERIFIED . $this->keyPrefix . $key;
if ($this->mc->get($verifiedKey)) {
$this->status[$verifiedKey] = 1;
return true;
}
}
}
}
$kos = !empty($this->config->kill);
// check killed
if ($kos) {
if ($ip && $this->mc->get(self::PREFIX_KILL . $ip)) {
$this->status[self::PREFIX_KILL . $ip] = 1;
return false;
}
if ($keys) {
foreach ($keys as $key) {
$killKey = self::PREFIX_KILL . $this->keyPrefix . $key;
if ($this->mc->get($killKey)) {
$this->status[$killKey] = 1;
return false;
}
}
}
}
// check ip rule
if ($ip && isset($this->config->ip)) {
if (!$this->checkRule($ip, $this->config->ip)) {
if ($kos && $this->mc->set(self::PREFIX_KILL . $ip, 1, intval($this->config->kill))) {
$this->status[self::PREFIX_KILL . $ip] = 1;
}
return false;
}
}
// check keys rule
if ($keys && isset($this->config->key)) {
foreach ($keys as $key) {
if (!$this->checkRule($this->keyPrefix . $key, $this->config->key)) {
$killKey = self::PREFIX_KILL . $this->keyPrefix . $key;
if ($kos && $this->mc->set($killKey, 1, intval($this->config->kill))) {
$this->status[$killKey] = 1;
}
return false;
}
}
}
return true;
}
/*更新限制规则*/
public function update($c = 1, $ip = null, $key = null) {
if (is_null($ip) && is_null($key)) {
if (!empty($this->updates)) {
foreach ($this->updates as $k => $v) {
if (!$v && isset($this->intervals[$k])) {
if ($this->mc->add($k, $c, false,$this->intervals[$k])) {
$this->status[self::STATUS_UPDATE . $k] = $c;
continue;
}
}
$r = $this->mc->increment($k, $c);
$this->status[self::STATUS_UPDATE . $k] = $r;
}
}
} else {
if (!is_null($ip) && isset($this->config->ip)) {
$rule = $this->config->ip;
foreach ($rule as $interval => $limit) {
$k = $this->keyPrefix . $ip . '_' . $interval;
if ($this->mc->add($k, $c,false,$interval)) {
$this->status[self::STATUS_UPDATE . $k] = true;
continue;
}
$r = $this->mc->increment($k, $c);
$this->status[self::STATUS_UPDATE . $k] = $r;
}
}
if (!is_null($key) && isset($this->config->key)) {
$rule = $this->config->key;
if (!is_array($key)) {
$keys = array($key);
} else {
$keys = $key;
}
foreach ($keys as $key) {
foreach ($rule as $interval => $limit) {
$k = $this->keyPrefix . $key . '_' . $interval;
if ($this->mc->add($k, $c,false,$interval)) {
$this->status[self::STATUS_UPDATE . $k] = true;
continue;
}
$r = $this->mc->increment($k, $c);
$this->status[self::STATUS_UPDATE . $k] = $r;
}
}
}
}
}
public function checkVerifyCode($key, $code) {
$servcode = $this->mc->get(self::PREFIX_VERIFYCODE . $this->keyPrefix . $key);
if (strcasecmp($servcode, $code) == 0) {
$verified = intval($this->config->verified);
if ($verified > 0) {
$r = $this->mc->set(self::PREFIX_VERIFIED . $this->keyPrefix . $key, 1, false, $verified);
} else {
$r = true;
}
if ($r) {
$this->mc->delete(self::PREFIX_VERIFYCODE . $this->keyPrefix . $key);
}
return $r;
}
return false;
}
public function isVerified($key) {
$r = $this->mc->get(self::PREFIX_VERIFIED . $this->keyPrefix . $key);
if (!empty($r)) {
return true;
} else {
return false;
}
}
public function setVerifyCode($key, $code) {
$verifytime = intval($this->config->verifytime);
if ($verifytime < 1) {
return false;
}
return $this->mc->set(self::PREFIX_VERIFYCODE . $this->keyPrefix . $key, $code, false, $verifytime);
}
public function getStatus() {
return $this->status;
}
private function filterByWhitelist($value, $key) {
// if (empty($this->whitelist[$key])) {
// return false;
// }
// $ls = & $this->whitelist[$key];
$ls = & $this->whitelist;
foreach ($ls as $i) {
if ($i[strlen($i) - 1] == '.') { // ip segment
if (strpos($value, $i) === 0) {
return true;
}
} else {
if (strcmp($i, $value) === 0) {
return true;
}
}
}
return false;
}
private function checkRule($key, $rule) {
$flag = true;
if (!empty($rule)) {
foreach ($rule as $interval => $limit) {
$k = $key . '_' . $interval;
$c = $this->mc->get($k);
if (!$c) {
$this->updates[$k] = 0;
$this->intervals[$k] = $interval;
$this->status[$k] = 0;
} else {
$this->updates[$k] = $c;
$this->status[$k] = $c;
if ($c >= $limit) {
$flag = false;
}
}
}
}
return $flag;
}
public static function getInstance($conf) {
$mc = new Memcache();
$mc->connect("115.159.28.112");
$conf=json_decode(json_encode($conf));
return new self($mc, $conf);
}
}
/*
单个ip限制60秒1次
单个关键字,比如手机号,限制60秒1次,3600秒10次
*/
$conf=array(
'prefix' => 'selfservice:',
'key' => array(60 => 1,3600=>10),
'ip' => array(60 => 1),
);
$spam=Sina_Mail_WebAntispam::getInstance($conf);
if(!$spam->check('127.25.12.123',17610725730)){
echo "limit...";
exit;
}
//更新频率限制
$spam->update();The final storage key in memache
PHP video tutorial]
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