How can the use of callback functions be beneficial in PHP programming?

Using callback functions in PHP programming can be beneficial as it allows for more flexibility and reusability in code. Callback functions can be passed as arguments to other functions, allowing for dynamic behavior based on the specific context. This can be particularly useful in scenarios where you want to define custom behavior for a certain process or event. 

// Example of using a callback function in PHP
function process_data($data, $callback_function) {
    // Perform some processing on the data
    $processed_data = $data * 2;
    
    // Call the callback function to further manipulate the processed data
    $result = $callback_function($processed_data);
    
    return $result;
}

// Define a custom callback function to square the input
function square_number($num) {
    return $num * $num;
}

// Usage example
$data = 5;
$result = process_data($data, 'square_number');
echo $result; // Output: 100

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