查看PHP的重载与覆盖及魔术方法使用的源代码


'''重载'''（overload），是发生在同一类中（与什么父类子类、继承毫无关系）&nbsp;&nbsp;

方法重载是让类以统一的方式处理不同类型数据的一种手段。多个同名函数同时存在，具有不同的参数个数/类型。重载overload是一个类中多态性的一种表现。

'''覆盖'''(override),&nbsp; 是发生在子类中，（也就是说必须有继承的情况下才有覆盖发生）&nbsp;&nbsp;&nbsp;

子类继承一个类，也就有了父类了全部方法，如果功能要变，那就把那个函数在子类中重新实现一遍。覆盖override也是一个类多态性的一种表现

严格意义上讲：重载必须函数名相同，参数在类型或者参数个数上必须有所不同，子类中具有与父类相同的返回类型及参数表，子类方法覆盖父类方法

PHP是弱类型语言，不支持严格意义上的重载，重写则对参数类型和个数也没有严格要求。

重写实例：

<?php

class Animal{

$height = 1;

public function eat($energy){

$this->height = $this->height+$energy/1000;

}

}

class Cat extend Animal{

public function eat($energy){

$this->height = $this->height+energy/2000;

}

}

$smallCat = new Cat();

$energy= 1000;

$smallCat->eat($energy);

?>

由于PHP不支持重载，但是可以曲线救国，实现方法就是使用PHP5.3的新特性:魔术方法__call(),__callStatic()

重载实例：

<?php

class Cat{

public $height = 1;

public $weight = 1;

public function __call($name,$arg){

$count = count($arg);

if($count>0){

switch($count){

case 1:

$this->height++;

break;

case 2:

$this->height++;

$this->weight++;

break;

default&nbsp;:

$this->height = $this->height+2;

$this->weight = $this->weight+2;

break;

}

}

}

}

$smallCat = new Cat();

$<span>fruit</span> = 1;

$meat = 1;

$smallCat->eat($<span>fruit</span>);

$smallCat->eat($<span>fruit</span>,$meat);

}

?>

如果是静态调用使用__callStatic,用法同上

<span style="font-size:14px"><span style="color:#ff0000">__call</span> 当要调用的方法不存在或权限不足时，会自动调用__call 方法。</span>

<span style="font-size:14px"><span style="color:#ff0000">__callStatic</span> 当调用的静态方法不存在或权限不足时，会自动调用__callStatic方法。</span>



<span style="font-size:14px">'''__call($funcname, $arguments)'''</span>

<span style="font-size:14px">'''__callStatic($funcname, $arguments)'''</span>

<br/><span style="font-size:14px;  color:#ff0000">'''参数说明：'''</span>

<span style="font-size:14px">'''$funcname''' String 调用的方法名称。</span>

<span style="font-size:14px">'''$arguments''' Array 调用方法时所带的参数。</span>

'''<span style="font-size:14px;  color:#ff0000">__call 例子</span>'''


<div class="dp-highlighter bg_php">
#<span><span><?php&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;</span>
#<span><span class="keyword">class</span><span>&nbsp;Member{&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">protected</span><span>&nbsp;</span><span class="vars">$memberdata</span><span>&nbsp;=&nbsp;</span><span class="keyword">array</span><span>();&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">public</span><span>&nbsp;</span><span class="keyword">function</span><span>&nbsp;__call(</span><span class="vars">$func</span><span>,&nbsp;</span><span class="vars">$arguments</span><span>){&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;list(<span class="vars">$type</span><span>,&nbsp;</span><span class="vars">$name</span><span>)&nbsp;=&nbsp;</span><span class="func">explode</span><span>(</span><span class="string">'_'</span><span>,&nbsp;</span><span class="vars">$func</span><span>);&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">if</span><span>(!in_array(</span><span class="vars">$type</span><span>,&nbsp;</span><span class="keyword">array</span><span>(</span><span class="string">'set'</span><span>,</span><span class="string">'get'</span><span>))&nbsp;||&nbsp;</span><span class="vars">$name</span><span>==</span>''<span>){&nbsp;&nbsp;</span>''</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">return</span><span>&nbsp;</span>''<span>;&nbsp;&nbsp;</span>''</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">switch</span><span>(</span><span class="vars">$type</span><span>){&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">case</span><span>&nbsp;</span><span class="string">'set'</span><span>:&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="vars">$this</span><span>->memberdata[</span><span class="vars">$name</span><span>]&nbsp;=&nbsp;</span><span class="vars">$arguments</span><span>[0];&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">break</span><span>;&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">case</span><span>&nbsp;</span><span class="string">'get'</span><span>:&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">return</span><span>&nbsp;isset(</span><span class="vars">$this</span><span>->memberdata[</span><span class="vars">$name</span><span>])?&nbsp;</span><span class="vars">$this</span><span>->memberdata[</span><span class="vars">$name</span><span>]&nbsp;:&nbsp;</span>''<span>;&nbsp;&nbsp;</span>''</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">break</span><span>;&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">default</span><span>:&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;</span>
#<span>}&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;</span>
#<span><span class="keyword">class</span><span>&nbsp;User&nbsp;</span><span class="keyword">extends</span><span>&nbsp;Member{&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">public</span><span>&nbsp;</span><span class="keyword">function</span><span>&nbsp;show(){&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">if</span><span>(</span><span class="vars">$this</span><span>->memberdata){&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">foreach</span><span>(</span><span class="vars">$this</span><span>->memberdata&nbsp;</span><span class="keyword">as</span><span>&nbsp;</span><span class="vars">$key</span><span>=></span><span class="vars">$member</span><span>){&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="func">echo</span><span>&nbsp;</span><span class="vars">$key</span><span>.</span><span class="string">':'</span><span>.</span><span class="vars">$member</span><span>.</span><span class="string">'&lt;br&gt;'</span><span>;&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;</span>
#<span>}&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;</span>
#<span><span class="keyword">class</span><span>&nbsp;Profession&nbsp;</span><span class="keyword">extends</span><span>&nbsp;Member{&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">public</span><span>&nbsp;</span><span class="keyword">function</span><span>&nbsp;show(){&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">if</span><span>(</span><span class="vars">$this</span><span>->memberdata){&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">foreach</span><span>(</span><span class="vars">$this</span><span>->memberdata&nbsp;</span><span class="keyword">as</span><span>&nbsp;</span><span class="vars">$key</span><span>=></span><span class="vars">$member</span><span>){&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="func">echo</span><span>&nbsp;</span><span class="vars">$key</span><span>.</span><span class="string">':'</span><span>.</span><span class="vars">$member</span><span>.</span><span class="string">'&lt;br&gt;'</span><span>;&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;</span>
#<span>}&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;</span>
#<span><span class="vars">$userobj</span><span>&nbsp;=&nbsp;</span><span class="keyword">new</span><span>&nbsp;User();&nbsp;&nbsp;</span></span>
#<span><span class="vars">$userobj</span><span>->set_name(</span><span class="string">'fdipzone'</span><span>);&nbsp;&nbsp;</span></span>
#<span><span class="vars">$userobj</span><span>->set_age(29);&nbsp;&nbsp;</span></span>
#<span><span class="vars">$userobj</span><span>->show();&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;</span>
#<span><span class="vars">$probj</span><span>&nbsp;=&nbsp;</span><span class="keyword">new</span><span>&nbsp;Profession();&nbsp;&nbsp;</span></span>
#<span><span class="vars">$probj</span><span>->set_profession(</span><span class="string">'IT&nbsp;SERVICE'</span><span>);&nbsp;&nbsp;</span></span>
#<span><span class="vars">$probj</span><span>->set_price(2500);&nbsp;&nbsp;</span></span>
#<span><span class="vars">$probj</span><span>->show();&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;</span>
#<span>?>&nbsp;&nbsp;</span>

<span style="font-size:14px;  color:#ff0000">'''_callStatic例子'''</span>


<div class="dp-highlighter bg_php">
#<span><span><?php&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;</span>
#<span><span class="keyword">class</span><span>&nbsp;Member{&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">protected</span><span>&nbsp;</span><span class="keyword">static</span><span>&nbsp;</span><span class="vars">$memberdata</span><span>&nbsp;=&nbsp;</span><span class="keyword">array</span><span>();&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">public</span><span>&nbsp;</span><span class="keyword">static</span><span>&nbsp;</span><span class="keyword">function</span><span>&nbsp;__callStatic(</span><span class="vars">$func</span><span>,&nbsp;</span><span class="vars">$arguments</span><span>){&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;list(<span class="vars">$type</span><span>,&nbsp;</span><span class="vars">$name</span><span>)&nbsp;=&nbsp;</span><span class="func">explode</span><span>(</span><span class="string">'_'</span><span>,&nbsp;</span><span class="vars">$func</span><span>);&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">if</span><span>(!in_array(</span><span class="vars">$type</span><span>,&nbsp;</span><span class="keyword">array</span><span>(</span><span class="string">'set'</span><span>,</span><span class="string">'get'</span><span>))&nbsp;||&nbsp;</span><span class="vars">$name</span><span>==</span>''<span>){&nbsp;&nbsp;</span>''</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">return</span><span>&nbsp;</span>''<span>;&nbsp;&nbsp;</span>''</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="vars">$feature</span><span>&nbsp;=&nbsp;get_called_class();&nbsp;</span></span>//获取静态方法调用的类名
#<span>&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">switch</span><span>(</span><span class="vars">$type</span><span>){&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">case</span><span>&nbsp;</span><span class="string">'set'</span><span>:&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;self::<span class="vars">$memberdata</span><span>[</span><span class="vars">$feature</span><span>][</span><span class="vars">$name</span><span>]&nbsp;=&nbsp;</span><span class="vars">$arguments</span><span>[0];&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">break</span><span>;&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">case</span><span>&nbsp;</span><span class="string">'get'</span><span>:&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">return</span><span>&nbsp;isset(self::</span><span class="vars">$memberdata</span><span>[</span><span class="vars">$feature</span><span>][</span><span class="vars">$name</span><span>])?&nbsp;self::</span><span class="vars">$memberdata</span><span>[</span><span class="vars">$feature</span><span>][</span><span class="vars">$name</span><span>]&nbsp;:&nbsp;</span>''<span>;&nbsp;&nbsp;</span>''</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">break</span><span>;&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">default</span><span>:&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;</span>
#<span>}&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;</span>
#<span><span class="keyword">class</span><span>&nbsp;User&nbsp;</span><span class="keyword">extends</span><span>&nbsp;Member{&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">public</span><span>&nbsp;</span><span class="keyword">static</span><span>&nbsp;</span><span class="keyword">function</span><span>&nbsp;show(){&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="vars">$feature</span><span>&nbsp;=&nbsp;get_called_class();&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">if</span><span>(self::</span><span class="vars">$memberdata</span><span>[</span><span class="vars">$feature</span><span>]){&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">foreach</span><span>(self::</span><span class="vars">$memberdata</span><span>[</span><span class="vars">$feature</span><span>]&nbsp;</span><span class="keyword">as</span><span>&nbsp;</span><span class="vars">$key</span><span>=></span><span class="vars">$member</span><span>){&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="func">echo</span><span>&nbsp;</span><span class="vars">$key</span><span>.</span><span class="string">':'</span><span>.</span><span class="vars">$member</span><span>.</span><span class="string">'&lt;br&gt;'</span><span>;&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;</span>
#<span>}&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;</span>
#<span><span class="keyword">class</span><span>&nbsp;Profession&nbsp;</span><span class="keyword">extends</span><span>&nbsp;Member{&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">public</span><span>&nbsp;</span><span class="keyword">static</span><span>&nbsp;</span><span class="keyword">function</span><span>&nbsp;show(){&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="vars">$feature</span><span>&nbsp;=&nbsp;get_called_class();&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">if</span><span>(self::</span><span class="vars">$memberdata</span><span>[</span><span class="vars">$feature</span><span>]){&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">foreach</span><span>(self::</span><span class="vars">$memberdata</span><span>[</span><span class="vars">$feature</span><span>]&nbsp;</span><span class="keyword">as</span><span>&nbsp;</span><span class="vars">$key</span><span>=></span><span class="vars">$member</span><span>){&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="func">echo</span><span>&nbsp;</span><span class="vars">$key</span><span>.</span><span class="string">':'</span><span>.</span><span class="vars">$member</span><span>.</span><span class="string">'&lt;br&gt;'</span><span>;&nbsp;&nbsp;</span></span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;</span>
#<span>}&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;</span>
#<span>User::set_name(<span class="string">'fdipzone'</span><span>);&nbsp;&nbsp;</span></span>
#<span>User::set_age(29);&nbsp;&nbsp;</span>
#<span>User::show();&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;</span>
#<span>Profession::set_profession(<span class="string">'IT&nbsp;SERVICE'</span><span>);&nbsp;&nbsp;</span></span>
#<span>Profession::set_price(2500);&nbsp;&nbsp;</span>
#<span>Profession::show();&nbsp;&nbsp;</span>
#<span>&nbsp;&nbsp;</span>
#<span>?>&nbsp;&nbsp;</span>
</div></div>