What is the differece between $message and $$message?

This is a good question and is one that springs up quite often from those learning PHP.

$message is the standard way to create a variable and then also to reference the value of that variable when we want to print it, whilst we can use $$ to actually print the name of that variable rather than its value:


<?php



$message = "hello";



echo $message;//prints hello



echo "$$message";//prints $message

?>

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What is the differece between $message and $$message?

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