There are many different open source licenses but they all must comply with the Open Source Definition - in brief: the software can be freely used, modified and shared. Programs released under this license can be used at no cost for both personal and commercial purposes. Open Source software is software with source code that anyone can inspect, modify or enhance. Freeware products can be used free of charge for both personal and professional (commercial use). You can jump in, in a short time, and start writing simple scripts in a few hours.įreeware programs can be downloaded used free of charge and without any time limitations. Don't be afraid to read the long list of PHP's features. The best things in using PHP are that it is extremely simple for a newcomer, but offers many advanced features for a professional programmer. You can even configure your webserver to process all your HTML files with PHP, and then there's really no way that users can tell what you have up your sleeve. The client would receive the results of running that script, but would not know what the underlying code was. What distinguishes PHP from something like client-side JavaScript is that the code is executed on the server, generating HTML which is then sent to the client. The code is enclosed in special start and end processing instructions that allow you to jump into and out of "PHP mode."
Instead of lots of commands to output HTML (as seen in C or Perl), pages contain HTML with embedded code that does "something" (in this case, output "Hi, I'm a PHP script!"). PHP (recursive acronym for PHP: Hypertext Preprocessor) is a widely-used open source general-purpose scripting language that is especially suited for web development and can be embedded into HTML.
Fast, flexible, and pragmatic, PHP powers everything from your blog to the most popular websites in the world. PHP is a popular general-purpose scripting language that is especially suited to web development.
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