What strategies can be employed to efficiently debug PHP code when encountering errors like unexpected end of file or missing closing brackets?

When encountering errors like unexpected end of file or missing closing brackets in PHP code, a common strategy is to carefully review the code for syntax errors or missing closing brackets. One approach is to use an integrated development environment (IDE) that highlights syntax errors or to enable error reporting in PHP settings. Additionally, using tools like PHP lint or a code validator can help identify and fix syntax errors efficiently.

<?php

// Example code with missing closing bracket
function exampleFunction() {
    echo "Hello, world!";
// Missing closing bracket
```

In this example, the missing closing bracket after the `echo` statement can be fixed by adding a closing curly brace `}` at the end of the function. 

Corrected code:

```php
<?php

// Example code with missing closing bracket
function exampleFunction() {
    echo "Hello, world!";
} // Added closing bracket