What is the difference between identifying form fields by ID versus name attribute in PHP?

When identifying form fields in PHP, using the ID attribute allows for more specific targeting of individual elements for manipulation using JavaScript or CSS. On the other hand, using the name attribute is essential for accessing form data in PHP when the form is submitted. It is important to use both attributes appropriately depending on the task at hand.

// Example of identifying a form field by ID
<input type="text" id="username" name="username">

// Example of identifying a form field by name attribute
<input type="text" id="email" name="email">