How can syntax errors, such as missing quotation marks in echo statements, be identified and resolved in PHP code?

Syntax errors like missing quotation marks in echo statements can be identified by carefully examining the code for any inconsistencies or missing characters. To resolve this issue, simply add the missing quotation marks where needed in the echo statement. Example:

// Incorrect code with missing quotation marks
echo Hello World!;
```

```php
// Corrected code with quotation marks added
echo "Hello World!";