PHP二維數組去重復項自定義函數

如果我們是一維數據去重復項就不要說了有直接的函數了，但二維數據php未提供函數了，下面小編來給大家推薦兩個不錯的二維數組去重復項自定義函數吧。

例1

<?php
function unique_array_2d($array2D,$stkeep=false,$ndformat=true)
{
       // 判斷是否保留一級數組鍵 (一級數組鍵可以為非數字)
       if($stkeep) $stArr = array_keys($array2D);

       // 判斷是否保留二級數組鍵 (所有二級數組鍵必須相同)
       if($ndformat) $ndArr = array_keys(end($array2D));

       //降維,也可以用implode,將一維數組轉換為用逗號連接的字符串
       foreach ($array2D as $v){
               $v = join(",",$v);
               $temp[] = $v;
       }

       //去掉重復的字符串,也就是重復的一維數組
       $temp = array_unique($temp);

       //再將拆開的數組重新組裝
       foreach ($temp as $k => $v)
       {
               if($stkeep) $k = $stArr[$k];
               if($ndformat)
               {
                       $tempArr = explode(",",$v);
                       foreach($tempArr as $ndkey => $ndval) $output[$k][$ndArr[$ndkey]] = $ndval;
               }
               else $output[$k] = explode(",",$v);
       }

       return $output;
}

$array2D = array(
       'first'=>array('title'=>'1111','date'=>'2222'),
       'second'=>array('title'=>'1111','date'=>'2222'),
       'third'=>array('title'=>'2222','date'=>'3333')
);

echo "<pre>";
print_r(unique_array_2d($array2D,true));

/**
* 將二維數組通過指定的 key 去重
*
* @param array $arr 要去重的數組
* @param array $by  指定key去重,該參數不指定將返回 array()
* @return array
*/
function array_multunique($arr,$by = array()) {
       $temp = array();
       foreach($arr as $key => $val) {
               foreach($by as $v) {
                       $temp[$key] .= isset($val[$v]) ? $val[$v] : '';
               }
       }
       return array_intersect_key($arr,array_unique($temp));
}
/*$aa = array ( 
   array ('id' => 123, 'name' => '張三' ),  
   array ('id' => 123, 'name' => '李四' ),  
   array ('id' => 124, 'name' => '王五' ),  
   array ('id' => 125, 'name' => '趙六' ),  
   array ('id' => 126, 'name' => '趙六' )  
); 
$key = 'id'; 
array_multunique ($aa, array('id')); */

function array_remove_key($array,$keys){
       if (!is_array($array) || !is_array($keys)){
               return false;
       }
       foreach($array as $t){
               foreach($keys as $k){
                       unset($t[$k]);
               }
               $doc[]=$t;
       }
       return $doc;

}
/*$array = array(
       '0' => array('a' => 'aaaaa', 'b' => 'bbbbb', 'c' => array('d' => 'ddddd', 'e' => 'eeeee')),
       '1' => array('a' => 'aaaaa', 'b' => 'bbbbb', 'c' => array('d' => 'ddddd', 'e' => 'eeeee'))
);
print_r( array_remove_key($array,array('c')));*/

function array_remove_key_val(&$a,$b,$c){
       foreach ($a as $key=>$value){
               if ( isset($value[$b]) && ($value[$b]==$c) ){
                       unset($a[$key]);
               }
       }
}
/*$a=array(
       array('id'=>1,'num'=>10,'type'=>'news'),
       array('id'=>2,'num'=>100,'type'=>'pic')
);
print_r( array_remove_key_val($a,"id","1") );*/

例2

/二維數組去掉重復值
function array_unique_fb($array2D){
     foreach ($array2D as $v){
         $v = join(",",$v);  //降維,也可以用implode,將一維數組轉換為用逗號連接的字符串
         $temp[] = $v;
     }
     $temp = array_unique($temp);    //去掉重復的字符串,也就是重復的一維數組
    foreach ($temp as $k => $v){
        $temp[$k] = explode(",",$v);   //再將拆開的數組重新組裝
    }
    return $temp;
}

//二維數組去掉重復值  並保留鍵值
function array_unique_fb($array2D){
    foreach ($array2D as $k=>$v){
        $v = join(",",$v);  //降維,也可以用implode,將一維數組轉換為用逗號連接的字符串
  $temp[$k] = $v;
    }
 $temp = array_unique($temp);    //去掉重復的字符串,也就是重復的一維數組
    foreach ($temp as $k => $v){
        $array=explode(",",$v);  //再將拆開的數組重新組裝
  $temp2[$k]["id"] =$array[0];  
  $temp2[$k]["litpic"] =$array[1];
  $temp2[$k]["title"] =$array[2];
  $temp2[$k]["address"] =$array[3];
  $temp2[$k]["starttime"] =$array[4];
  $temp2[$k]["endtime"] =$array[5];
  $temp2[$k]["classid"] =$array[6];
  $temp2[$k]["ename"] =$array[7];
 }
    return $temp2;
}