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类方法返回值,奇怪的现象解决思路

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WBOYOriginal
2016-06-13 12:52:18828browse

类方法返回值,奇怪的现象

本帖最后由 xuzuning 于 2013-03-08 14:59:52 编辑 各位大侠,请看如下代码:
我要实现的功能是,利用一个多维数组输出一个树状结构,下面的参数是多维数组。

//递归树状输出格式一

	public function accountTreeType1($arrData){<br />
<br />
		$this->strLable = $this->strLable.'<ul>';<br />
<br />
		foreach($arrData as $val){<br />
<br />
			if(is_array($val['child'])){<br />
				$this->strLable = $this->strLable.'<li>'.$val['acc_code'].$val['acc_name'];<br />
				$this->accountTreeType1($val['child']);<br />
			}else{<br />
<br />
				$this->strLable = $this->strLable.'<li>'.$val['acc_code'].$val['acc_name'].'</li>';<br />
                                 if($val[id]=='最后一个ID'){<br />
                                      return $this->strLable; //在这里没有返回值,不过用echo $this->strLable;是可以打印出来,但是返回值为空。<br />
                                 }<br />
<br />
			}<br />
<br />
		}<br />
<br />
		$this->strLable = $this->strLable.'</ul>';<br />
<br />
	}

------解决方案--------------------
方法的最后加上
return $this->strLable;
------解决方案--------------------
 public function accountTreeType1($arrData){
        $strLable .= '
    ';
            foreach($arrData as $val){
                if(is_array($val['child'])){
                    $strLable .= '
  • '.$val['acc_code'].$val['acc_name'].'
  • ';
                    $strLable .= $this->accountTreeType1($val['child']);
                }else{
                    $strLable .= '
  • '.$val['acc_code'].$val['acc_name'].'
  • ';
                }
            }
            return $strLable.'
';
 }
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