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344 B

<?php
//$array = [1, 3, 4, 5, 6];
//
//var_dump($array[2.3]);
//
//var_dump($array['3.2']);
//
//$str = "hello world\n";
//var_dump($str[99]);
//var_dump($str[-3]);
function foo()
{
global $gv;
$gv = 100;
}
function main()
{
var_dump($_SERVER);
foo();
global $gv;
var_dump($gv);
global $gv;
var_dump($gv);
}