How can the issue of not being able to echo a variable in the second frame of a popup be resolved in PHP?

The issue of not being able to echo a variable in the second frame of a popup can be resolved by passing the variable through the URL parameters from the first frame to the second frame. This way, the variable will be accessible in the second frame for echoing. 

// First frame (popup1.php)
$variable = "Hello";
echo "<a href='popup2.php?var=" . urlencode($variable) . "' target='_blank'>Open Popup 2</a>";

// Second frame (popup2.php)
$variable = urldecode($_GET['var']);
echo $variable;

Keywords

PHP variable echo popup frame

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