[PHP]Variable Variables

	
		
	
	
	";
	echo $hello."
";
	
	echo $$a."
";
	
	// What does $$var[1] mean?
	// #1: get the first element then evaluate dynamically?
	// #2: evaluate dynamically then get the first element?
	
	// Use {} to make it clear:
	// echo ${$var[1]};  // for #1
	// echo ${$var}[1];	 // for #2
	
	?>
	
 

hello
Hello everyone.
Hello everyone.