foo this is one example bar
this is a line I don't care about
foo here's another keeper! bar
foo yet another bar
and a line to reject

##</code><code>##

while ($text =~/foo(*.?)bar/) {
   manipulate ($1)
}

##</code><code>##

while ($text =~/foo(*.?)bar/g) {
   manipulate ($1)
}

##</code><code>##

while ($text =~/\Gfoo(*.?)bar/g) {
   manipulate ($1)
}

##</code><code>##

($text =~/foo(*.?)bar/g)
manipulate ($1);
while ($text =~/\Gfoo(*.?)bar/g) {
   manipulate ($1)
}