javascript - Pass PHP variable within echo <script> content

Question

I am trying to pass $php_variable to JavaScript content in echo tag in one php file. It is because I hope to append the query value from old_page_url to new_page_url by using window.location.

For example,

http://example/?data=1234 to http://example/something-else/1234

My code snippet:

<?php

$php_variable = "testing";
echo "<script>";
echo "var toURL = 'http://example.com/something-else/'";
echo "window.location = toURL + $php_variable";
echo "</script>";

I have tried:

<?php

$php_variable = "testing";
echo "<script>";
echo "var toURL = 'http://example.com/something-else/'";
echo "window.location = toURL + json_decode($php_variable)";
echo "</script>";

and

<?php

$php_variable = "testing";
echo "<script>";
echo "var toURL = 'http://example.com/something-else/'";
echo "window.location = toURL + <?php echo $php_variable; ?>";
echo "</script>";

But these two don't work. Any idea?

Update: Final Code Snippet

<?php

$php_variable = "testing";
$toURL = "http://example.com/something-else";
echo "<script>";
echo "window.location = '$toURL/$php_variable'";
echo "</script>";

question from:https://stackoverflow.com/questions/65713228/pass-php-variable-within-echo-script-content

Answer 1

echo "window.location = 'http://example.com/something-else/$php_variable'";