What common syntax errors can lead to unexpected parse errors in PHP code?

Common syntax errors that can lead to unexpected parse errors in PHP code include missing semicolons at the end of statements, mismatched parentheses or curly braces, and using incorrect variable names. To solve these issues, carefully review your code for any missing or misplaced syntax elements and ensure that all variable names are spelled correctly. Example:

// Incorrect code with missing semicolon
$name = "John"
echo "Hello, $name!";
```

To fix the issue, add a semicolon at the end of the `$name` assignment statement:
```php
// Corrected code with semicolon added
$name = "John";
echo "Hello, $name!";