What is the difference between using id and class in PHP for CSS styling?

When styling elements in PHP using CSS, the main difference between using id and class is that id is unique and can only be applied to one element on the page, while class can be applied to multiple elements. If you want to style a specific element uniquely, you would use an id. If you want to style multiple elements in the same way, you would use a class. 

<!DOCTYPE html>
<html>
<head>
<style>
#unique {
  color: blue;
}

.same {
  color: red;
}
</style>
</head>
<body>

<?php
echo '<div id="unique">This is a unique element.</div>';

echo '<div class="same">This is the first element with the same styling.</div>';
echo '<div class="same">This is the second element with the same styling.</div>';
?>

</body>
</html>

Keywords

id class PHP CSS styling

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