How can variables from a main PHP program be passed to and displayed in a secondary browser window opened with JavaScript?

To pass variables from a main PHP program to a secondary browser window opened with JavaScript, you can use query parameters in the URL of the new window. You can encode the variables in the URL when opening the new window using JavaScript and then extract and display them in the secondary window using JavaScript. 

<?php
$variable1 = "Hello";
$variable2 = "World";

echo "<script>";
echo "window.open('secondary_window.php?var1=" . urlencode($variable1) . "&var2=" . urlencode($variable2) . "', '_blank');";
echo "</script>";
?>

Keywords

PHP JavaScript variable passing window.open data transfer

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