Home >Backend Development >PHP Tutorial >PHP implements access to object properties in array mode

PHP implements access to object properties in array mode

WBOY
WBOYOriginal
2016-07-28 08:26:481419browse

The main idea is to implement the ArrayAccess interface and __get, __set magic methods

<code><span><span>class</span><span>ArrObject</span><span>implements</span><span>ArrayAccess</span> {</span><span>private</span><span>$_data</span>;
    <span>public</span><span><span>function</span><span>__construct</span><span>(<span>$data</span>)</span>{</span><span>$this</span>->_data = <span>$data</span>;
    }
    <span>public</span><span><span>function</span><span>offsetGet</span><span>(<span>$offset</span>)</span>{</span><span>return</span> (<span>$this</span>->offsetExists(<span>$offset</span>) ? <span>$this</span>->_data[<span>$offset</span>] : <span>null</span>);
    }
    <span>public</span><span><span>function</span><span>offsetSet</span><span>(<span>$offset</span>, <span>$value</span>)</span>{</span><span>$this</span>->_data[<span>$offset</span>] = <span>$value</span>;
    }
    <span>public</span><span><span>function</span><span>offsetExists</span><span>(<span>$offset</span>)</span>{</span><span>return</span><span>isset</span>(<span>$this</span>->_data[<span>$offset</span>]);
    }
    <span>public</span><span><span>function</span><span>offsetUnset</span><span>(<span>$offset</span>)</span>{</span><span>if</span>(<span>$this</span>->offsetExists(<span>$offset</span>)){
            <span>unset</span>(<span>$this</span>->_data[<span>$offset</span>]);
        }
    }
    <span>public</span><span><span>function</span><span>__get</span><span>(<span>$offset</span>)</span>{</span><span>return</span> (<span>$this</span>->offsetExists(<span>$offset</span>) ? <span>$this</span>->_data[<span>$offset</span>] : <span>null</span>);
    }
    <span>public</span><span><span>function</span><span>__set</span><span>(<span>$offset</span>, <span>$value</span>)</span>{</span><span>$this</span>->_data[<span>$offset</span>] = <span>$value</span>;
    }
}</code>

Test:

<code><span>$data</span>  = <span>array</span>(<span>'a'</span>=><span>'a'</span>,<span>'b'</span>=><span>'b'</span>,<span>'c'</span>=><span>'c'</span>);
<span>$test</span>  = <span>new</span> ArrObject(<span>$data</span>);
<span>echo</span><span>$test</span>[<span>'a'</span>]; <span>//a</span><span>echo</span><span>$test</span>->a;   <span>//a</span></code>
').addClass('pre-numbering').hide(); $(this).addClass('has-numbering').parent().append($numbering); for (i = 1; i ').text(i)); }; $numbering.fadeIn(1700); }); });

The above has introduced PHP's implementation of accessing object properties in array mode, including aspects of it. I hope it will be helpful to friends who are interested in PHP tutorials.

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