What potential issues could arise from not including the necessary class files in PHP scripts?

If the necessary class files are not included in PHP scripts, the code will not be able to access the classes and their methods, leading to fatal errors or undefined function calls. To solve this issue, you need to include the required class files using the `require_once` or `include_once` function at the beginning of your script. 

// Include the necessary class files
require_once 'path/to/ClassFile.php';
require_once 'path/to/AnotherClassFile.php';

// Your PHP script code here
// Now you can use the classes and their methods in your script

Keywords

include class files PHP scripts fatal error undefined class

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