How can syntax errors like unexpected T_STRING be avoided when writing PHP code for web applications?

To avoid syntax errors like unexpected T_STRING in PHP code for web applications, always make sure to properly enclose strings in quotes, especially when they contain special characters or variables. Use concatenation when necessary to combine strings and variables. Additionally, using an integrated development environment (IDE) with syntax highlighting can help catch these errors before running the code.

// Incorrect code that may result in unexpected T_STRING error
$name = "John";
echo "Hello, $name"
```

```php
// Corrected code with proper string encapsulation and concatenation
$name = "John";
echo "Hello, " . $name;