PHP two-dimensional array custom function to remove duplicate items_PHP tutorial

function unique_array_2d($array2D,$stkeep=false,$ndformat=true)
{
// Determine whether to retain the first-level array key (the first-level array key can be non-numeric)
If($stkeep) $stArr = array_keys($array2D);

// Determine whether to retain the secondary array keys (all secondary array keys must be the same)
If($ndformat) $ndArr = array_keys(end($array2D));

//Dimensionality reduction, you can also use implode to convert a one-dimensional array into a string connected with commas
foreach ($array2D as $v){
                    $v = join(",",$v);
                  $temp[] = $v;
}

//Remove repeated strings, that is, repeated one-dimensional arrays
         $temp = array_unique($temp);

//Reassemble the disassembled array
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));

/**

* Deduplicate the two-dimensional array through the specified key

*

* @param array $arr Array to remove duplicates

* @param array $by Specify key to remove duplicates. If this parameter is not specified, array()
 will be returned
* @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") );*/