Are there any best practices for converting PHP 5 scripts to PHP 4 manually?

When converting PHP 5 scripts to PHP 4 manually, it is important to be aware of the differences in syntax and functionality between the two versions. Some best practices include replacing object-oriented features with procedural code, using older functions and constructs that are compatible with PHP 4, and testing the code thoroughly to ensure compatibility.

// Example code snippet showing how to convert PHP 5 object-oriented code to PHP 4 procedural code

// PHP 5 code
class MyClass {
    public function myMethod() {
        return "Hello World!";
    }
}

$obj = new MyClass();
echo $obj->myMethod();

// PHP 4 equivalent code
function myMethod() {
    return "Hello World!";
}

echo myMethod();