CODE EXAMPLE FOR PHP

php unique associative nested array by value

<?php
    function uniquAsoc($array,$key){
        $resArray=[];
        foreach($array as $val){
          if(empty($resArray)){
            array_push($resArray,$val);
          }else{
            $value=array_column($resArray,$key);
            if(!in_array($val[$key],$value)){
                array_push($resArray,$val);
              }
          }          
        }
        
        return $resArray;
    }
$array=[['phone'=>123,'id'=>1],['phone'=>748,'id'=>1],['phone'=>958,'id'=>3]];
print_r(uniquAsoc($array,'id')); 
/*
Array
(
    [0] => Array
        (
            [phone] => 123
            [id] => 1
        )

    [1] => Array
        (
            [phone] => 958
            [id] => 3
        )

)
  */
?>