How to write the code for the back button?

Question

I have a php code here and I would like to create a "back" href to get me back to where I was before. Here\'s what I have:

Answer 1

Back

this one (by Eiko) is perfect, use css to make a button of ... eg you can use this css class in as `

Back`

.back_button {
display:block;
width:100px;
height:30px;
text-align:center;
background-color:yellow;
border:1px solid #000000;
}