PHP全局变量

<?php

$name = 'Ramsey';

function print_and_chean_name()
{
echo "<p>{$GLOBALS['name']}</p>";
$GLOBALS['name'] .= 'Heather';
echo "<p>{$GLOBALS['name']}</p>";
}

print_and_chean_name();
?>

<?php

$name = 'Ramsey';

function print_and_chean_name()
{
global $name;
$name .= "嗯嗯";

echo "<p>{$name}</p>";
echo $name;
}

print_and_chean_name();
?>