How to call double echo or double variable in php -

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i trying variable in php, existing text have issue this.

when echo $address_number; list3.

so need variable $list3 , need echo $list3; after that.

something <?php echo $(echo $address_number;); ?>

but not possible. solutions?

solution:

$address_number = $address.$number;  $iframe_url ="$address_number";  <?php echo $$iframe_url; ?>

thanks everybody!


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