compile.sh

composer require yay/yay:dev-master
vendor/bin/yay range.yay.php > range.php

range.php

<?php

$first = 1;
$last = 5;

var_dump(range(1, 5));
var_dump(range($first, 5));
var_dump(range(1, $last));

range.yay.php

<?php

macro { T_VARIABLE·A |> T_VARIABLE·B } >> {
    range(T_VARIABLE·A, T_VARIABLE·B)
}

macro { T_LNUMBER·A |> T_LNUMBER·B } >> {
    range(T_LNUMBER·A, T_LNUMBER·B)
}

macro { T_VARIABLE·A |> T_LNUMBER·B } >> {
    range(T_VARIABLE·A, T_LNUMBER·B)
}

macro { T_LNUMBER·A |> T_VARIABLE·B } >> {
    range(T_LNUMBER·A, T_VARIABLE·B)
}

$first = 1;
$last = 5;

var_dump(1 |> 5);
var_dump($first |> 5);
var_dump(1 |> $last);