$line = '|i1234|lABCD|i5678|i90|lBOO';

for ($line) {
   /\G \|i     ([^|]*) /gcx && do { print "barcode: $1\n";  redo; };
   /\G \|l     ([^|]*) /gcx && do { print "homeloc: $1\n";  redo; };
   /\G \|[^il]  [^|]*  /gcx && do { redo; }; # skip bad stuff
}

__END__
output
======
barcode: 1234
homeloc: ABCD
barcode: 5678
barcode: 90
homeloc: BOO