Redis 기반 세션 처리 방법

Redis 기반의 세션 처리 방법은 다음과 같습니다.

<span> 1</span> <?<span>php
</span><span> 2</span><span>class</span><span> Session_custom {
</span><span> 3</span><span>private</span><span>$redis</span>; <span>//</span><span> redis实例</span><span> 4</span><span>private</span><span>$prefix</span> = 'sess_'; <span>//</span><span> session_id前缀
</span><span> 5</span><span> 6</span><span>    // 会话开始时，会执行该方法，连接redis服务器</span><span> 7</span><span>public</span><span>function</span> open(<span>$path</span>, <span>$name</span><span>) {
</span><span> 8</span><span>$this</span>->redis = <span>new</span><span> Redis();
</span><span> 9</span><span>return</span><span>$this</span>->redis->connect("127.0.0.1",6379<span>);
</span><span>10</span><span>    }
</span><span>11</span><span>12</span><span>//</span><span> 会话结束时，调用该方法，关闭redis连接</span><span>13</span><span>public</span><span>function</span><span> close() {
</span><span>14</span><span>$this</span>->redis-><span>close();
</span><span>15</span><span>return</span><span>true</span><span>;
</span><span>16</span><span>    }
</span><span>17</span><span>18</span><span>//</span><span> 会话保存数据时调用该方法，在脚本执行完或session_write_close方法调用之后调用</span><span>19</span><span>public</span><span>function</span> write(<span>$session_id</span>, <span>$data</span><span>) {
</span><span>20</span><span>return</span><span>$this</span>->redis->hMSet(<span>$this</span>->prefix.<span>$session_id</span>, <span>array</span>('expires' => <span>time</span>(), 'data' => <span>$data</span><span>));
</span><span>21</span><span>    }
</span><span>22</span><span>23</span><span>//</span><span> 在自动开始会话或者通过调用 session_start() 函数手动开始会话之后，PHP 内部调用 read 回调函数来获取会话数据。</span><span>24</span><span>public</span><span>function</span> read(<span>$session_id</span><span>) {
</span><span>25</span><span>if</span>(<span>$this</span>->redis->exists(<span>$this</span>->prefix.<span>$session_id</span><span>)) {
</span><span>26</span><span>return</span><span>$this</span>->redis->hGet(<span>$this</span>->prefix.<span>$session_id</span>, 'data'<span>);
</span><span>27</span><span>        }
</span><span>28</span><span>return</span> ''<span>;
</span><span>29</span><span>    }
</span><span>30</span><span>31</span><span>//</span><span> 清除会话中的数据，当调用session_destroy()函数，或者调用 session_regenerate_id()函数并且设置 destroy 参数为 TRUE 时,会调用此回调函数。</span><span>32</span><span>public</span><span>function</span> destroy(<span>$session_id</span><span>) {
</span><span>33</span><span>if</span>(<span>$this</span>->redis->exists(<span>$this</span>->prefix.<span>$session_id</span><span>)) {
</span><span>34</span><span>return</span><span>$this</span>->redis->del(<span>$this</span>->prefix.<span>$session_id</span>) > 0 ? <span>true</span> : <span>false</span><span>;
</span><span>35</span><span>        }
</span><span>36</span><span>return</span><span>true</span><span>;
</span><span>37</span><span>    }
</span><span>38</span><span>39</span><span>//</span><span> 垃圾回收函数，调用周期由 session.gc_probability 和 session.gc_divisor 参数控制</span><span>40</span><span>public</span><span>function</span> gc(<span>$maxlifetime</span><span>) {
</span><span>41</span><span>$allKeys</span> = <span>$this</span>->redis->keys("{<span>$this</span>->prefix}*"<span>);
</span><span>42</span><span>foreach</span>(<span>$allKeys</span><span>as</span><span>$key</span><span>) {
</span><span>43</span><span>if</span>(<span>$this</span>->redis->exists(<span>$key</span>) && <span>$this</span>->redis->hGet(<span>$key</span>, 'expires') + <span>$maxlifetime</span> < <span>time</span><span>()) {
</span><span>44</span><span>$this</span>->redis->del(<span>$key</span><span>);
</span><span>45</span><span>            }
</span><span>46</span><span>        }
</span><span>47</span><span>return</span><span>true</span><span>;
</span><span>48</span><span>    }
</span><span>49</span><span>}
</span><span>50</span><span>51</span><span>//</span><span> 调用自定义的session处理方法</span><span>52</span><span>$handler</span> = <span>new</span><span> Session_custom();
</span><span>53</span><span>session_set_save_handler</span><span>(
</span><span>54</span><span>array</span>(<span>$handler</span>, 'open'),
<span>55</span><span>array</span>(<span>$handler</span>, 'close'),
<span>56</span><span>array</span>(<span>$handler</span>, 'read'),
<span>57</span><span>array</span>(<span>$handler</span>, 'write'),
<span>58</span><span>array</span>(<span>$handler</span>, 'destroy'),
<span>59</span><span>array</span>(<span>$handler</span>, 'gc'<span>)
</span><span>60</span><span>);
</span><span>61</span><span>62</span><span>//</span><span> 下面这行代码可以防止使用对象作为会话保存管理器时可能引发的非预期行为,表示当脚本执行之后或调用exit()之后，存储当前会话数据并关闭当前会话</span><span>63</span><span>register_shutdown_function</span>('session_write_close'<span>);
</span><span>64</span><span>65</span><span>session_start</span><span>();
</span><span>66</span><span>67</span><span>//</span><span> 可以使用session了</span>

보충:

php.ini 파일의 session.gc_probability 및 session.gc_divisor 두 구성 옵션은 gc 함수 호출의 타이밍을 공동으로 결정합니다. 기본값은 1과 1000으로 나누어집니다. 이는 각 요청이 gc 함수를 호출할 확률이 1/1000이라는 것을 의미합니다.

위 내용은 redis 기반의 세션 처리 방법을 관련 내용까지 포함하여 소개한 내용으로, PHP 튜토리얼에 관심이 있는 친구들에게 도움이 되기를 바랍니다.