Import data in CSV format. Normally an easy task using split but sometimes, the fields will have comma's enclosed by quotes.
Something like.
Aaron, "123 Main St, USA", 555-555-1212
Assuming your string gets put into $text.

    my @new  = ();
    push(@new, $+) while $text =~ m{
        # the first part groups the phrase inside the quotes.
        # see explanation of this pattern in MRE
        "([^\"\\]*(?:\\.[^\"\\]*)*)",?
           |  ([^,]+),?
           | ,
       }gx;
       push(@new, undef) if substr($text, -1,1) eq ',';

Taken from Jeffrey Friedl's Mastering Regular Expressions

Encode a string so that it's safe to be passed in a url. Equivalent of urlencode in PHP.

$str =~ s/([^A-Za-z0-9])/sprintf("%%%02X", ord($1))/seg;

Now, the reverse, decode a string from a url. Equivalent of urldecode in PHP.

$str =~ s/\%([A-Fa-f0-9]{2})/pack('C', hex($1))/seg;