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how to redirect with js and alert if turn in previous page?

i want to redirect to a php page for example example.php and make possible not to turn back to the first page,if try to turn i must alert the user.i dont want do delete the page from hisotry. Any of that insrtuction:

    window.open('example.php','_self') or
    location.href:example.php or
    header("location: example.php) or
or location.replace('example.php;)

cant do what i want. is there any javascript method or php function to make that? Thanks in advance!

Solution

  • In Javascript you can use location.replace() to assign a new url - it forgets the previous location ( removes from history ) 

    location.replace( 'example.php' );

    For reference, try MDN