How can PHP developers troubleshoot the issue of a required file not being found?

If a required file is not found, PHP developers can troubleshoot the issue by checking the file path, ensuring proper file permissions, and verifying that the file exists in the specified location. They can also use the `file_exists()` function to confirm the existence of the required file before including or requiring it in their code. 

$file_path = 'path/to/required/file.php';

if (file_exists($file_path)) {
    require_once $file_path;
} else {
    echo 'Error: Required file not found.';
}

Keywords

PHP file path include require error handling

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