use strict;

my($web,$incident_id);


$web = "
bla log_id=12345& bla Label Defect bla>
bla log_id=53456& bla Label Defect bla>
bla log_id=13642& bla Label Defect bla>
bla log_id=48735& bla Label Defect bla>
";
print "$web\n";

  foreach ($web =~ m/(log_id\=(\d*)\&.*?Label Defect)/gm) {
   print "Found \"Label Defect\"\n";
   $incident_id = $2;
   print "INC: $incident_id\n";
   print "$1\n";
   do "stuff for each $incident_id";
}