2.1. Embedding PHP Scripts
In Chapter 1, when I talked about Apache and web servers in general, I mentioned how a server will process PHP in a file before sending that file to the browser. But you might be curious how the server knows where to look for PHP.
By default, servers look for PHP only in files that end with the .php extension. But a .php file can contain elements that aren't part of your PHP script, and searching the entire file for potential scripts is confusing and resource-intensive. To solve this issue, all PHP scripts need to be contained with PHP delimiters. To begin a PHP script, you include the opening delimiter <?php and start coding. To finish, you simply add ?> to the end of the script. Anything outside of these delimiters ...
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