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Editorial Team
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Asked: 2026-05-26T16:42:17+00:00

I’m writing a PHP script and would like to present a warning message if

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I’m writing a PHP script and would like to present a warning message if the user clicks the back button on the browser. Is this something I can do in PHP? The only solution I’ve been able to find is via javascript, however it presents a warning message every time something is submitted on the page. If there is not a way to do this in PHP, can this javascript be altered to only work when the back button is pressed on the browser? Thanks.

 <script type="text/javascript" language="javascript" defer="defer">
 window.onbeforeunload = eventTermination;
 function eventTermination(args) {
 args.returnValue = ('WARNING:CANNOT GO BACK');
 }
 </script>
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1 Answer

  1. Editorial Team

    You can’t use PHP for this as PHP is a server-side scripting, means that the script is compiled on the server and sent to the client broswer as a HTML file.

    But JS is a client-side script, which means that it is compiled on browser side (client side).

    So for your request, PHP is not possible.

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