Perl is a popular programming language used by many different websites, such as The Guardian, Amazon and IMDB. 123-reg Hosting packages come with a Perl debugger which will allow you to test your Perl code and iron out any mistakes you may have.
To check and validate Perl code on your website, please do the following:
Login to your 123-reg control panel.
Scroll down to the web hosting section.
Select the relevant domain name from the drop down box and click on the Manage button.
Click on the Perl Validator option in the Website Help & Diagnostics section.
Then enter the path to the script you wish to check into the field and press the Check Now button.