请编写一段程序将$arr1转换为$arr2
$arr1 = array( '0'=>array ('fid'=>1,'tid'=>1,'name'=>'Name1'), '1'=>array ('fid'=>2,'tid'=>2,'name'=>'Name2'), '2'=>array ('fid'=>3,'tid'=>5,'name'=>'Name3'), '3'=>array ('fid'=>4,'tid'=>7,'name'=>'Name4'), '4'=>array ('fid'=>5,'tid'=>9,'name'=>'Name5'), );
$arr2 = array ('1'=> array('0' => array ('tid' => 1, 'name' => 'Name1'),'1'=> array ( 'tid' => 2, 'name' => 'Name2'),'2' => array ( 'tid' => 5, 'name' => 'Name3'),'3' => array ( 'tid' => 7, 'name' => 'Name4' ),'4' => array ('tid' => 9, 'name' => 'Name5' )));
方法1:
$arr2 = [];
foreach ($arr1 as $key=>$value){unset($value['fid']);$arr2[1][] = $value;}print_r($arr2);
方法2:
foreach ($arr1 as $key=>$value){$item[$value['fid']][] = array('tid'=>$value['tid'],'name'=>$value['name'],);}foreach ($item as $v){$arr2[] = $v;}var_dump($arr2);die();