Security Announcement

Never echo without any safety precautions

Using echo without any safety precautions is a dangerous thing to do.

Try this: Run the code below, and open the application in a new tab. In the number field, fill in 4" onclick="alert('Hellooooo'). Now submit the form. Nothing looks off, and the number 4 still shows up in the form field. Now, click on the number field. Not a pleasant surprise!