What are some best practices for including script code in PHP files?

When including script code in PHP files, it is important to follow best practices to ensure readability, maintainability, and security. One common approach is to separate the script code from the HTML markup by using PHP opening and closing tags. Additionally, using functions and classes can help organize and modularize the code. It is also recommended to avoid directly echoing HTML within PHP code and instead use templates or separate view files. 

<?php
// Example of including script code in a PHP file

// Define functions or classes
function calculateSum($a, $b) {
    return $a + $b;
}

// Use PHP opening and closing tags to separate script code
?>
<!DOCTYPE html>
<html>
<head>
    <title>PHP Script Code Example</title>
</head>
<body>
    <h1>Sum of 5 and 3 is: <?php echo calculateSum(5, 3); ?></h1>
</body>
</html>

Keywords

PHP script code include security validation

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