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<?php $$a = '$a'; echo $a; echo $$a; echo $$$a;
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $a in /in/rDdXI on line 3 Warning: Undefined variable $a in /in/rDdXI on line 4 Warning: Undefined variable $a in /in/rDdXI on line 5 $a Warning: Undefined variable $a in /in/rDdXI on line 6 Warning: Undefined variable $$a in /in/rDdXI on line 6

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