The PHP script is used to make a website dynamic.
The code must be written within the defined PHP tags otherwise it would not execute.
With tags, you can display the final output after data manipulation e.g. listing fetch records from MySQL database in the <table>, display value in HTML element, upload image, etc.
Contents
1. PHP Tags
All PHP codes are specified within <?php ?> tag.
Syntax –
<?php // code ?>
Example
<html>
<body>
<?php
echo "PHP CODE";
?>
</body>
</html>
2. Include and require
With include and require statement, you can include existing PHP files in your file.
Syntax – include
include "file-path";
Syntax – require
require "file-path";
Both statements are used for including file but the only difference is –
The require statement trigger FATAL ERROR if a file is included more than once but the include statement doesn’t.
In the example, I have included config.php file on the page. config.php file contains PHP code.
After including the PHP file you can use functions and variables of the including file on your page.
Example
<?php include "config.php"; ?>
<html>
<body>
<?php
echo "PHP CODE";
?>
</body>
</html>
3. Conclusion
Specify your PHP code between <?php ?> tags in the webpage. You can use include and require statements to embed existing PHP files.
