What is the impact of starting and ending PHP in every line of code on script performance and readability in PHP forums?

Starting and ending PHP in every line of code can have a negative impact on script performance as it increases the overhead of parsing and executing PHP code. It also makes the code less readable and harder to maintain. To improve performance and readability, it is recommended to minimize the number of PHP opening and closing tags in your code.

<?php

// Bad practice
echo "Hello ";
?>
<?php
echo "World";

// Good practice
echo "Hello ";
echo "World";
?>