'; $arr1[] = array( 'id'=>0, 'username'=>'clive', 'password'=>1, 'age'=>1 ); $arr1[] = array( 'id'=>1, 'username'=>'clive1', 'password'=>2, 'age'=>2 ); $arr1[] = array( 'id'=>2, 'username'=>'clive2', 'password'=>3, 'age'=>3 ); print_r($arr1); echo '';
'; foreach ($arr1 as $key=>$val){ echo '数组的键名为:'.$key.',username的值为:'.$val['username'].'
'; } echo '