PHP 遞歸函數使用實例

創建遞歸數組

//$fid 父id $v['id'] 子id $v['child'] 子id數組
    //$cate 要循環的一維數組
    function digui($cate, $fid = 0){
        foreach ($cate as $v)
         {
            if ($v['fid'] == $fid) 
            {
                $v['child'] = digui($cate, $v['id']);
                $arr[] = $v;
            }
        }
        return $arr;
    }

   digui($arrAll);

遞歸數組轉一維數組

$arrayiter = new RecursiveArrayIterator($arrAll);
    $iteriter = new RecursiveIteratorIterator($arrayiter);
    //直接打印即可按照橫向順序打印出來
    foreach ($iteriter as $key => $val){
        echo $key.'=>'.$val;
    }

function get_array_elems($arrResult, $where = "array"){
        while(list($key,$value)=each($arrResult)){
            if (is_array($value)){
                get_array_elems($value, $where."[$key]");
            }
            else {
                for ($i=0; $i<count($value);$i++){
                    echo $where."[$key]=".$value."<BR>\n";
                }
            }
        }
    }


    get_array_elems($arrAll);

順序輸出遞歸數組

function get_cate(&$data=array(),$fid=0,$i=-1){
        $i++;
        $sql="select id,fid from toa_module where fid='$fid'";
        $result=mysql_query($sql);
        while ($row=mysql_fetch_assoc($result)){
            $row['num']=$i;
            $data[]=$row;
            get_cate($data,$row['id'],$i);
        }
        return $data;
    }