In the provided PHP code examples, what are the advantages and disadvantages of using concatenation versus direct output in echo statements?

When outputting text in PHP using the `echo` statement, you can either concatenate strings together or directly output them. Advantages of using concatenation: 1. Concatenation allows for more flexibility when combining variables and strings. 2. It can make the code easier to read and understand in some cases. Disadvantages of using concatenation: 1. It can be less efficient in terms of performance compared to direct output. 2. Using excessive concatenation can make the code harder to maintain. To solve this issue, it's important to strike a balance between using concatenation and direct output based on the specific context and requirements of the code. Example PHP code snippet:

// Using concatenation
$name = "John";
$age = 30;

echo "My name is " . $name . " and I am " . $age . " years old.";

// Using direct output
echo "My name is $name and I am $age years old.";