- PHP is a server-side scripting language designed for web development but also used as a general-purpose programming language.
- PHP is designed to fill the gap between SSI (Server Side Includes) and Perl, intended for the web environment. Its principal application is the implementation of web pages having dynamic content.
- PHP was installed on more than 240 million websites (39% of those sampled) and 2.1 million web servers according to a survey.
- Originally created by Rasmus Lerdorf in 1994, the reference implementation of PHP is now produced by The PHP Group
- PHP originally stood for Personal Home Page,it now stands for PHP: Hypertext Preprocessor as a recursive acronym.
- Its popularity derives from its C-like syntax, and its simplicity. The newest version of PHP is 5.5 and it is heavily recommended to always use the newest version for better security, performance and of course features.
Syntax : -
<?PHP
// Your Coding
?>
- When PHP parses a file, it looks for opening and closing tags, which are <?php and ?> which tell PHP to start and stop interpreting the code between them. Parsing in this manner allows PHP to be embedded in all sorts of different documents, as everything outside of a pair of opening and closing tags is ignored by the PHP parser.
- PHP also allows for short open tags <? and ?> (which are discouraged because they are only available if enabled with short_open_tag php.ini configuration file directive, or if PHP was configured with the --enable-short-tags option.
- If a file is pure PHP code, it is preferable to omit the PHP closing tag at the end of the file. This prevents accidental whitespace or new lines being added after the PHP closing tag, which may cause unwanted effects because PHP will start output buffering when there is no intention from the programmer to send any output at that point in the script.
<?php
echo "Hello world";
// ... more code
echo "Last statement";
// the script ends here with no PHP closing tag
Any Doubts clarify it in the Comment Section.
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