Is this a php variable variable bug? -

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is there logical explanation this?

<?php   $$a = 'hello world';   echo $$a; //displays hello world   echo $$aa; //displays hello world   echo $$aaa; //displays hello world   ?>

if try

$$a = 'hello world'; echo $$a; //displays hello world echo $$aa; //displays hello world echo $$aaa; //displays hello world   die( "<pre>" . print_r( get_defined_vars(), true ) . "</pre>" );

you can see has registed variable no name yes, according php's naming conventions, bug


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