How can PHP developers effectively troubleshoot and debug syntax errors, such as unexpected T_STRING, in their code?

To effectively troubleshoot and debug syntax errors like unexpected T_STRING in PHP code, developers should carefully review the line of code where the error is reported, paying attention to any missing or misplaced quotation marks or special characters. It is also helpful to use an integrated development environment (IDE) that can highlight syntax errors in real-time. Additionally, using PHP's built-in error reporting functions like error_reporting(E_ALL) can help identify and resolve syntax errors quickly.

// Example code snippet with unexpected T_STRING error
echo "Hello, world!;
```

```php
// Corrected code snippet with missing quotation mark
echo "Hello, world!";