create a php variable inside a php variable [duplicate]

Question

My PHP code has several PHP variables like this.

$a0 = $arr[0]['id'];
$a1 = $arr[1]['id'];
$a2 = $arr[2]['id'];
$a3 = $arr[3]['id'];
$a4 = $arr[4]['id'];

I want to create these PHP variables using a for loop This is what I tried so far. But it’s not working.

for($i=0; $i<5; $i++)
{
  $a.''.$i = $arr [$i]['id'];
}

Can anyone please help me?

Answer 1

Simply enclose in brackets {}

for($i=0; $i<5; $i++)
{
    ${'a'.$i} = $arr[$i]['id'];
}

Now

echo $a0; //$arr[0]['id'];
echo $a1; //$arr[1]['id'];
echo $a2; //$arr[2]['id'];
echo $a3; //$arr[3]['id'];
echo $a4; //$arr[4]['id'];

Answer 2

for($i=0; $i<5; $i++)
{
     $name = 'a' . $i;
     $$name = $arr [$i]['id'];
}