What You See is What You Get
Unlike PHP, ASP is a proprietary technology that requires upgrades and the purchase of many extra packages such as ASPEncrypt, Qmail and SA-FileUp for encryption, sending mail (with attachments etc) and file uploading. All these functions are built into PHP and don’t represent hidden costs.
When a business buys ASP, if you need encryption — you must buy ASPEncrypt; if you need email management — you must buy ServerObject’s QMail. If you Need file uploading — you must buy Software Artisans SA-FileUp; and the same goes for usermanagement components, image generation, and for pdf file generation.
All this is built into PHP for free.