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.
Nice, but what does that mean? An example:
Example #1 An introductory example
<!DOCTYPE HTML>
<html>
<head>
<title>Example</title>
</head>
<body>
<?php
echo "Hi, I'm a PHP script!";
?>
</body>
</html>
Instead of lots of commands to output HTML (as seen in C or Perl),
PHP pages contain HTML with embedded code that does
"something" (in this case, output "Hi, I'm a PHP script!").
The PHP code is enclosed in special start and end processing
instructions
<?php and ?>
that allow you to jump into and out of "PHP mode."
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