使用javascript将PHP变量复制到剪贴板

$variable = "Hello, World!";

function copyToClipboard(text) {
  var tempInput = document.createElement("input");
  tempInput.value = text;
  document.body.appendChild(tempInput);
  tempInput.select();
  document.execCommand("copy");
  document.body.removeChild(tempInput);
}

window.onload = function() {
  var phpVariable = "<?php echo $variable; ?>";
  copyToClipboard(phpVariable);
}