How to get the previous url using PHP

Question

Suppose my site s url is given as hyperlink on some page on the internet  that page could be anything on internet - blog  orkut  yahoo  even stackoverflow etc  and someone clicks on it and visited my site  So can we know  using php  the previous url from which the visitor came to my page

User · Answer

SERVER  HTTP REFERER   will give you incomplete url   If you want http   bawse 3owl com jayz  magna carta holy grail php    SERVER  HTTP REFERER   will give you http   bawse 3owl com  only

User · Answer

SERVER  HTTP REFERER   is the answer

User · Answer

But you could make an own link for every from url   Example  http   example com auth holasite  In this example your site is  example com  If somebody open that link it s give you the holasite value for the auth variable   Then just   GET  auth   and you have the variable  But you should have a database to store it  and to authorize   Like   holasite   http   holasite com  You could use mysql too     And just match it  and you have the url   This method is a little bit more complicated  but it works  This method is good for a referral system authentication  But where is the site name  you should write an id  and works with that id

User · Answer

I can t add a comment yet  so I wanted to share that HTTP REFERER is not always sent   Notice  Undefined index  HTTP REFERER

User · Answer

Use the   SERVER  HTTP REFERER   header  but bear in mind anybody can spoof it at anytime regardless of whether they clicked on a link

[php] How to get the previous url using PHP

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