how to change php variable name in a loop?

Question

Lets say I have a variable called $file and the for loop: for($i=1; $i <= 5; $i++) {}

For each iteration of the for loop, the $i value w

Answer 1

See PHP's manual on Variable Variables.

$var_name = '';
for ($i = 0; $i < 5; $i++)
{
  $var_name = 'file' . $i;

  // reference $$var_name now.
  $$var_name = 'foo';
}

var_dump($file1);
var_dump($file2);
var_dump($file3);
var_dump($file4);
var_dump($file5);

demo