What is the common syntax error indicated by "unexpected 'echo'" in PHP scripts?

The common syntax error indicated by "unexpected 'echo'" in PHP scripts typically occurs when there is a misplacement of a semicolon, parentheses, or quotation marks in the code. To solve this issue, carefully check the line where the error is reported and ensure that all syntax elements are correctly placed and balanced. Additionally, make sure that any variables or functions being echoed are properly defined and enclosed within the echo statement.

// Incorrect code with syntax error: unexpected 'echo'
echo "Hello, World!;
```

```php
// Corrected code with fixed syntax error
echo "Hello, World!";