Two special examples of factory methods in php

Factory method, simply put, is a method to generate instances of classes.
The factory pattern is the most commonly used instantiation object pattern. It is a pattern that uses factory methods to replace the new operation.
Here is a special example:
We want to create an earthling. There are two kinds of people on earth, men and women:

<code><span><span><?php</span><span>//实现工厂方法</span><span><span>interface</span><span>abstracted</span>{</span><span>public</span><span><span>function</span><span>realCreate</span><span>()</span>;</span>
}
<span>//女人类</span><span><span>class</span><span>Wuman</span>{</span><span>public</span><span><span>function</span><span>action</span><span>()</span>{</span><span>echo</span><span>"这是女人"</span>;
    }
}
<span>//男人类</span><span><span>class</span><span>Man</span>{</span><span>public</span><span><span>function</span><span>action</span><span>()</span>{</span><span>echo</span><span>"这是男人"</span>;
    }
}
<span>//创建女人</span><span><span>class</span><span>womanCreator</span><span>implements</span><span>abstracted</span>{</span><span>public</span><span>$chromosome</span>;<span>//染色体</span><span>public</span><span><span>function</span><span>realCreate</span><span>()</span>{</span><span>if</span>(<span>$this</span>->chromosome == <span>"xx"</span>){
            <span>return</span><span>new</span> Wuman();
        }
    }
}
<span>//创建男人</span><span><span>class</span><span>manCreator</span><span>implements</span><span>abstracted</span>{</span><span>public</span><span>$chromosome</span>;<span>//染色体</span><span>public</span><span><span>function</span><span>realCreate</span><span>()</span>{</span><span>if</span>(<span>$this</span>->chromosome == <span>"xy"</span>){
            <span>return</span><span>new</span> Man();
        }
    }
}
<span>//人类工厂</span><span><span>class</span><span>PersonFactory</span>{</span><span>public</span><span><span>function</span><span>create</span><span>(<span>$category</span>)</span>{</span><span>$method</span> = <span>"{$category}Creator"</span>;
        <span>return</span><span>$create</span> = <span>new</span><span>$method</span>();
    }
}
<span>$create</span> = <span>new</span> PersonFactory();<span>//创造人类</span><span>$instance</span> = <span>$create</span>->create(<span>'woman'</span>);<span>//创造女人</span><span>$instance</span>->chromosome = <span>"xx"</span>;<span>//女性染色体</span><span>$instance</span>->realCreate()->action();

<span>?></span></span></span></code>

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