PHP is used for creating web portals, Websites, E-commerce Platform , CMS , ERP Systems, Web Services created in PHP are used in Android Applications.
It is used to tell the sever to use the PHP parser. To begin php you must use <?php, and to end it, it is ?>.
You can't use PHP in an HTML document, but you can use HTML in PHP script.
PHP files extension is .php
Firstly, this is wrong question. The right one would be WHEN should you use PHP, not JSP? or, WHEN should you use PHP and WHEN JSP?
PHP 5 has a XML parser called SimpleXML that you could use.
You can use phpMailer() Or, you can use mail() PHP function to send emails via PHP script.
PHP certification is received after doing some sort of PHP course, there are many out there to do. You can use them in your CV to help you get a job in PHP.
Facebook uses PHP 5.
There are no PHP tags. Unlike HTML, PHP is not Markup language. They use scripts. An example would be <?php echo "Hello, World!"; ?>
That's PHP Engine.. Allow you to develop PHP Scripts.. you can use it to develop PHP Scripts and test it on your local machine before you send it to server.. (your website)
PHP itself is a scripting language, and uses it's own PHP interpreter (engine).
PHP is an Open Source Scripting Language. We can create Web Pages and Web Applications using PHP.