parameter transferrance

I see from a php manual that php variable could transfer in different pages, so I wrote the following two pages:
1.submit.php
<form name=”form” method=”post” action=”adds.php”>
<input name=”name” type=”text”>
<input type=”submit” name=”submit” value=”submit”>
</form>
2.adds.php
<? php echo $name; ?>
In the first one,it generated a variable “$name” automatically,
but why the second adds.php show nothing on the page?

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