What role does proper nesting of curly braces play in preventing syntax errors in PHP code?

Proper nesting of curly braces in PHP code is crucial in preventing syntax errors because it defines the scope of code blocks. If curly braces are not correctly nested, it can lead to unexpected behavior or errors in the code. To ensure proper nesting, each opening curly brace '{' must have a corresponding closing curly brace '}' in the correct order.

// Incorrect nesting example
if ($condition) {
    echo "Condition is true!";
} else {
    echo "Condition is false!";
// Missing closing curly brace
```

```php
// Correct nesting example
if ($condition) {
    echo "Condition is true!";
} else {
    echo "Condition is false!";
}