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@ 2019-12-06T14:00:19Z

<?php

$data = Array
(
     0  => Array
        (
             "id"  => 17,
             "drug"  => "Clobazam"
        ),

     1  => Array
        (
            "id" => 23,
            "drug" => "Dexametasona"
        ),

     2  => Array
        (
            "id" => 23,
            "drug" => "Diiodohidroxiquinoleína"
        ),

     3  => Array
        (
            "id" => 25,
            "drug" => "Diclofenac,dietilamina"
        )
        );

function collect_same_id(&$data){
        
        $tmp = [];
        $i = 0;
        foreach($data as $ind=>$rec){
          
             if(!array_key_exists($rec['id'],$tmp)){ 
                $tmp[$rec['id']] = $i;
                $i++;
            } else {
                $data[$tmp[$rec['id']]]['drug'] .= ', '.$rec['drug'];
                unset($data[$ind]); 
            } 
        }
        sort($data);
}

collect_same_id($data);

print_r($data);

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [0] => Array ( [id] => 17 [drug] => Clobazam ) [1] => Array ( [id] => 23 [drug] => Dexametasona, Diiodohidroxiquinoleína ) [2] => Array ( [id] => 25 [drug] => Diclofenac,dietilamina ) )

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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