PHP. Replace negative elements in the mass with positive elements

[yajahira]

Dun mass M (20). Create a program that transforms the negative elements of this body into positive.

[charlenef]

Evolution of the code in php research
Yes.

$m = [1,-1,...];

termination 1

for($i = 0; $i < count($m); $i++){
    if($m[$i] < 0){
        $m[i] = -$m[$i];
    } 
}

termination 2

$len = count($m);
for($i = 0; $i < $len; $i++){
   ....
}

terrain 2.1

 $n = count($m);
 while($n--){ 
    $m[$n] = ....
 }

termination 3

foreach($m as $idx => $v){
   if($v < 0) $m[$idx] = -$v;
}

Fourth

foreach($m as &$v){
   if($v < 0 )   $v = -$v;
}

Five. One.

foreach($m as &$v){
    $v = $v < 0 ? -$v : $v;
}

Five. Two.

 foreach($m as &$v){
     $v = $v * ($v < 0 ? -1 : 1);
 }

Six.

 foreach($m as &$v) $v = abs($v);

Seven.

array_walk($m, function(&$v){
        $v = abs($v);
    });

eight.

$m = array_map(function($v){ return abs($v); }, $m);

eight. One.

$m = array_map($fn($v) => abs($v), $m);

9

$m = array_map('abs', $m);