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<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Understand Basic Difference Between $ & $$Variable</title> </head> <body> <h1>Understand Basic Difference Between $ & $$Variable</h1> <?php $city="mumbai"; $$city="delhi"; ${${$city}}="gorakhpur"; echo $city. "<br>"; //output:mumbai echo $$city. "<br>"; //output:delhi. echo $mumbai; //output :gorakhpur ?> </body> </html>
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