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Variables,  
Variable

1) What will be the output? <?php $name = 'foo'; $$name = 'bar'; echo $foo;





2) Fill the blank <?php $name = '123'; $$name = '456'; echo _______; // output 456





3) What will be the error (if any) in case of the following code <?php function foo() {} $function = "foo"; $function();





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