Is it possible to create a link/button in PHP that can execute CMD locally on the user's computer?

It is not possible to directly execute CMD commands on a user's computer using PHP as PHP runs on the server-side and does not have access to the client-side system. If you need to perform actions on the user's computer, you can consider using JavaScript to run commands on the client-side. 

// PHP code that generates a link/button to run JavaScript code
echo '<a href="#" onclick="executeCMD()">Run CMD</a>';

// JavaScript function to execute CMD command
echo '<script>
function executeCMD() {
    // Example command to open CMD prompt
    var cmdCommand = "cmd.exe /c start cmd";
    var shell = new ActiveXObject("WScript.Shell");
    shell.run(cmdCommand);
}
</script>';

Keywords

PHP link/button execute CMD locally user's computer

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