What best practices should PHP developers follow when organizing file structures and including files in PHP scripts to avoid errors like "failed opening file for inclusion"?

When organizing file structures and including files in PHP scripts, developers should follow best practices such as using absolute paths, checking for file existence before including, and using appropriate error handling to avoid errors like "failed opening file for inclusion". 

// Example of including a file using absolute path and checking for existence

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

if (file_exists($file_path)) {
    include $file_path;
} else {
    echo "File not found";
}

Keywords

autoloading namespaces require_once include_path file permissions

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