PHP二維數(shù)組實(shí)現(xiàn)去除重復(fù)項(xiàng)的方法【保留各個(gè)鍵值】

$arr = array(
     '0'=>array(
          'name'=>'james',
          'age'=>30,
          ),
     '1'=>array(
          'name'=>'susu',
          'age'=>26,
          ),
     '2'=>array(
          'name'=>'james',
          'age'=>30,
          ),
     'new'=>array(
          'name'=>'kube',
          'age'=>37,
          ),
     'list'=>array(
          'name'=>'kube',
          'age'=>27,
          ),
     );

?php
$arr = array(
     '0'=>array(
          'name'=>'james',
          'age'=>30,
          ),
     '1'=>array(
          'name'=>'susu',
          'age'=>26,
          ),
      '2'=>array(
          'name'=>'james',
          'age'=>30,
          ),
      'new'=>array(
          'name'=>'kube',
          'age'=>37,
          ),
      'list'=>array(
          'name'=>'kube',
          'age'=>27,
          ),
      );
printf("Before tranform the array:br>");  //輸出原來的數(shù)組
print_r($arr);
echo "br/>";
function more_array_unique($arr=array()){
  foreach($arr[0] as $k => $v){
    $arr_inner_key[]= $k;  //先把二維數(shù)組中的內(nèi)層數(shù)組的鍵值記錄在在一維數(shù)組中
  }
  foreach ($arras $k => $v){
    $v =join(",",$v);  //降維 用implode()也行
    $temp[$k] =$v;   //保留原來的鍵值 $temp[]即為不保留原來鍵值
  }
  printf("After split the array:br>");
  print_r($temp);  //輸出拆分后的數(shù)組
  echo"br/>";
  $temp =array_unique($temp);  //去重：去掉重復(fù)的字符串
  foreach ($tempas $k => $v){
    $a = explode(",",$v);  //拆分后的重組 如：Array( [0] => james [1] => 30 )
    $arr_after[$k]= array_combine($arr_inner_key,$a); //將原來的鍵與值重新合并
  }
  //ksort($arr_after);//排序如需要：ksort對(duì)數(shù)組進(jìn)行排序(保留原鍵值key) ,sort為不保留key值
  return$arr_after;
}
$arr_new = more_array_unique($arr); //調(diào)用去重函數(shù)
printf("Duplicate removal of the array:br>");
print_r($arr_new);
echo "br/>";
?>

Before tranform the array:  //原來數(shù)組
Array ( [0] => Array ( [name] => james [age] => 30 ) [1] => Array ([name] => susu [age] => 26 ) [2] => Array ( [name] => james [age]=> 30 ) [new] => Array ( [name] => kube [age] => 37 ) [list] =>Array ( [name] => kube [age] => 27 ) )
After split the array: //拆分后數(shù)組
Array ( [0] => james,30 [1] => susu,26 [2] => james,30 [new] =>kube,37 [list] => kube,27 )
Duplicate removal of thearray: //去重后數(shù)組
Array ( [0] => Array ( [name] => james [age] => 30 ) [1] => Array ([name] => susu [age] => 26 ) [new] => Array ( [name] => kube [age]=> 37 ) [list] => Array ( [name] => kube [age] => 27 ) )

?php
$arr= array(……); //同上的二維數(shù)組
functionsecond_array_unique_bykey($arr, $key){
  $tmp_arr = array();
  foreach($arr as $k => $v)
  {
    if(in_array($v[$key], $tmp_arr))  //搜索$v[$key]是否在$tmp_arr數(shù)組中存在，若存在返回true
    {
      unset($arr[$k]); //銷毀一個(gè)變量 如果$tmp_arr中已存在相同的值就刪除該值
    }
    else {
      $tmp_arr[$k] = $v[$key]; //將不同的值放在該數(shù)組中保存
    }
  }
  //ksort($arr); //ksort函數(shù)對(duì)數(shù)組進(jìn)行排序(保留原鍵值key) sort為不保留key值
  return $arr;
  }
  $key ='name';
  $arr_key = second_array_unique_bykey($arr,$key);
  printf("As for the givenkey->%s:br>",$key);
  print_r($arr_key);
  echo "br/>";
?>

As for the given key->name:
Array ( [0] => Array ( [name] => james [age] => 30 ) [1] => Array ([name] => susu [age] => 26 ) [new] => Array ( [name] => kube [age]=> 37 ) )