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php5  5.3.10
globals.inc
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00001 <?php
00002 
00003 var_dump(isset($_SERVER));
00004 var_dump(empty($_SERVER));
00005 var_dump(gettype($_SERVER));
00006 var_dump(count($_SERVER));
00007 
00008 var_dump($_SERVER['PHP_SELF']);
00009 unset($_SERVER['PHP_SELF']);
00010 var_dump($_SERVER['PHP_SELF']);
00011 
00012 unset($_SERVER);
00013 var_dump($_SERVER);
00014 
00015 ?>