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

Use ${'varname'} syntax:

for($i=1; $i <= 5; $i++) {
    ${'file' . $i} = $i;
}

However, it's often better to use arrays instead of this.