Home  >  Article  >  Backend Development  >  Interface usage of arrayAccess, arrayaccess interface_PHP tutorial

Interface usage of arrayAccess, arrayaccess interface_PHP tutorial

WBOY
WBOYOriginal
2016-07-13 10:04:35757browse

arrayAccess interface usage, arrayaccess interface

<?<span>php
    </span><span>//</span><span>get the methods instance of ArrayAccess
    //get the properties instance of ArrayAccess</span>
    <span>$reflection</span> = <span>new</span> ReflectionClass('ArrayAccess'<span>);
    </span><span>//</span><span>var_dump($reflection->getMethods());
    //var_dump($reflection->getProperties());</span>
    
    <span>class</span> dbTypes <span>implements</span><span> ArrayAccess{
        </span><span>private</span> <span>$dbtypes</span> = <span>array</span><span>();
        
        </span><span>//</span><span>判定是否存在</span>
        <span>public</span> <span>function</span> offsetExists(<span>$offset</span><span>){
            </span><span>return</span> <span>isset</span>(<span>$this</span>->dbtypes[<span>$offset</span>]) ? <span>true</span> : <span>false</span><span>;
        }
        </span><span>//</span><span>获取一个值</span>
        <span>public</span> <span>function</span> offsetGet(<span>$offset</span><span>){
            </span><span>if</span>(<span>$this</span>->offsetExists(<span>$offset</span><span>)){
                </span><span>return</span> <span>$this</span>->dbtypes[<span>$offset</span><span>];
            }</span><span>else</span><span>{
                </span><span>return</span> <span>null</span><span>;
            }
        }
        </span><span>//</span><span>设置一个值</span>
        <span>public</span> <span>function</span> offsetSet(<span>$offset</span>,<span>$value</span><span>){
                </span><span>$this</span>->dbtypes[<span>$offset</span>] = <span>$value</span><span>;
        }
        </span><span>//</span><span>删除一个值</span>
        <span>public</span> <span>function</span> offsetUnset(<span>$offset</span><span>){
            </span><span>unset</span>(<span>$this</span>->dbtypes[<span>$offset</span><span>]);
        }
    }
    
    </span><span>$types</span> = <span>new</span><span> dbTypes();
    </span><span>echo</span> <span>$types</span>['nosql'<span>];
    
    
    
    </span>

www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/965028.htmlTechArticlearrayAccess interface usage, arrayaccess interface? php // get the methods instance of ArrayAccess //get the properties instance of ArrayAccess $reflection = new ReflectionClass('Arra...
Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn