PHP二维数组去重复项自定义函数_PHP教程

function unique_array_2d($array2D,$stkeep=false,$ndformat=true)
{
       // 判断是否保留一级数组键 (一级数组键可以为非数字)
       if($stkeep) $stArr = array_keys($array2D);

       // 判断是否保留二级数组键 (所有二级数组键必须相同)
       if($ndformat) $ndArr = array_keys(end($array2D));

       //降维,也可以用implode,将一维数组转换为用逗号连接的字符串
       foreach ($array2D as $v){
               $v = join(",",$v);
               $temp[] = $v;
       }

       //去掉重复的字符串,也就是重复的一维数组
       $temp = array_unique($temp);

       //再将拆开的数组重新组装
       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 "

";

print_r(unique_array_2d($array2D,true));
/**

* 将二维数组通过指定的 key 去重

*

* @param array $arr 要去重的数组

* @param array $by  指定key去重,该参数不指定将返回 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' => '张三' ),   

   array ('id' => 123, 'name' => '李四' ),   

   array ('id' => 124, 'name' => '王五' ),   

   array ('id' => 125, 'name' => '赵六' ),   

   array ('id' => 126, 'name' => '赵六' )   

);  

$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") );*/

/二维数组去掉重复值
function array_unique_fb($array2D){
     foreach ($array2D as $v){
         $v = join(",",$v);  //降维,也可以用implode,将一维数组转换为用逗号连接的字符串
         $temp[] = $v;
     }
     $temp = array_unique($temp);    //去掉重复的字符串,也就是重复的一维数组
    foreach ($temp as $k => $v){
        $temp[$k] = explode(",",$v);   //再将拆开的数组重新组装
    }
    return $temp;
}

//二维数组去掉重复值  并保留键值
function array_unique_fb($array2D){
    foreach ($array2D as $k=>$v){
        $v = join(",",$v);  //降维,也可以用implode,将一维数组转换为用逗号连接的字符串
  $temp[$k] = $v;
    }
 $temp = array_unique($temp);    //去掉重复的字符串,也就是重复的一维数组
    foreach ($temp as $k => $v){
        $array=explode(",",$v);  //再将拆开的数组重新组装
  $temp2[$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;
}