Php evaluate a string as variable and extract value of it - 


<?php              $i=2;      $teststring='$_session["registered"]["firstname'.$i.'"]';            var_dump($teststring);       die;       if(isset(($teststring))){          //do       } ?>

in above code want find value of $_session["registered"]["firstname2'] variable , need suggestion/trick

why not just

$foo = $_session['registered']["firstname$i"];

array keys strings, , can dynamically generated. there absolutely no difference in php between these two:

$foo = array('bar' => 'baz'); $x = 'bar';  echo $foo[$x]; echo $foo['bar'];

both output baz.


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