How to use yii2 session

yii2opensession<span></span>

<span>use</span><span>yii</span><span>\</span><span>web</span><span>\</span><span>Session</span><span>;
 
</span><span>$session</span><span> = </span><span>Yii</span><span>::</span><span>$app</span><span>-></span><span>session</span><span>;
</span><span>//</span><span> check if a session is already open</span><span>if</span><span>(</span><span>$session</span><span>-></span><span>isActive</span><span>)</span><span> ...
</span><span>//</span><span> open a session</span><span>$session</span><span>-></span><span>open</span><span>(</span><span>)</span><span>;
</span><span>//</span><span> close a session</span><span>$session</span><span>-></span><span>close</span><span>(</span><span>)</span><span>;
</span><span>//</span><span> destroys all data registered to a session.</span><span>$session</span><span>-></span><span>destroy</span><span>(</span><span>)</span><span>;

</span><span>设置</span><span>session
</span><span>$session</span><span> = </span><span>Yii</span><span>::</span><span>$app</span><span>-></span><span>session</span><span>;
</span><span>$session</span><span>-></span><span>set</span><span>(</span><span>'</span><span>user_id</span><span>'</span><span>, </span><span>'</span><span>1234</span><span>'</span><span>)</span><span>;
</span><span>//</span><span>OR</span><span>$session</span><span>[</span><span>'</span><span>user_id</span><span>'</span><span>]</span><span> = </span><span>'</span><span>1234</span><span>'</span><span>;
</span><span>//</span><span>OR</span><span>$_SESSION</span><span>[</span><span>'</span><span>user_id</span><span>'</span><span>]</span><span> = </span><span>'</span><span>1234</span><span>'</span><span>;

</span><span>读取</span><span>session
</span><span>$session</span><span> = </span><span>Yii</span><span>::</span><span>$app</span><span>-></span><span>session</span><span>;</span>

<span></span>

<span>$user_id</span><span> = </span><span>$session</span><span>-></span><span>get</span><span>(</span><span>'</span><span>user_id</span><span>'</span><span>)</span><span>;
</span><span>//</span><span>OR</span><span>$user_id</span><span> = </span><span>$session</span><span>[</span><span>'</span><span>user_id</span><span>'</span><span>]</span><span>;
</span><span>//</span><span>OR</span><span>$user_id</span><span> = </span><span>isset</span><span>(</span><span>$_SESSION</span><span>[</span><span>'</span><span>user_id</span><span>'</span><span>]</span><span>)</span><span> ? </span><span>$_SESSION</span><span>[</span><span>'</span><span>user_id</span><span>'</span><span>]</span><span> : </span><span>null</span><span>;
销毁</span><span>session</span><span>$session</span><span> = </span><span>Yii</span><span>::</span><span>$app</span><span>-></span><span>session</span><span>;
</span><span>$session</span><span>-></span><span>remove</span><span>(</span><span>'</span><span>user_id</span><span>'</span><span>)</span><span>;
</span><span>//</span><span>OR</span><span>unset</span><span>(</span><span>$session</span><span>[</span><span>'</span><span>user_id</span><span>'</span><span>]</span><span>)</span><span>;
</span><span>//</span><span>OR</span><span>unset</span><span>(</span><span>$_SESSION</span><span>[</span><span>'</span><span>user_id</span><span>'</span><span>]</span><span>)</span><span>;

</span><span>数组</span><span>session</span><span>的读取与设置

</span><span>$session</span><span> = </span><span>Yii</span><span>::</span><span>$app</span><span>-></span><span>session</span><span>;
</span><span>$session</span><span>[</span><span>'</span><span>user</span><span>'</span><span>]</span><span> = </span><span>[</span><span>'</span><span>id</span><span>'</span><span> => </span><span>1</span><span>,
    </span><span>'</span><span>username</span><span>'</span><span> => </span><span>'</span><span>yiiuser</span><span>'</span><span>,
</span><span>]</span><span>;
</span><span>echo</span><span>$session</span><span>[</span><span>'</span><span>user</span><span>'</span><span>]</span><span>[</span><span>'</span><span>id</span><span>'</span><span>]</span><span>;
</span><span>echo</span><span>$session</span><span>[</span><span>'</span><span>user</span><span>'</span><span>]</span><span>[</span><span>'</span><span>username</span><span>'</span><span>]</span><span>;
 
</span><span>$session</span><span>[</span><span>'</span><span>user.id</span><span>'</span><span>]</span><span> = </span><span>1</span><span>;
</span><span>$session</span><span>[</span><span>'</span><span>user.username</span><span>'</span><span>]</span><span> = </span><span>'</span><span>yiiuser</span><span>'</span><span>;</span>

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<span>转自：http://www.kuitao8.com/20141213/3351.shtml</span>

The above introduces how to use yii2 session, including various aspects. I hope it will be helpful to friends who are interested in PHP tutorials.